Question # 1

Which of the following is more elastic material?

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iron

Aluminum

Wood

Rubber

The pressure will be low where the speed of fluid is

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Zero

High

Low

Constant

When the temperature difference between the source and the the sink increases, the efficiency of the heat engine will

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Increase

Decrease

Is not affected

May increase or decrease depending upon the nature of the working substance

The velocity-time graph of a car is a straight line which rises the same height for equal intervals of time, if it moves with

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zero velocity

constant velocity

zero acceleration

constant acceleration

A longitudinal sinusoidal wave has wavelength of 1cm and a period of 2sec. Its wavevelocity is:

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50 cm/ sec

0.5 cm/ sec

5 m/ s

0.005 m/ sec

When the terminal velocity is reached the acceleration of body moving through a viscous medium is

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Zero

Positive

Negative

Depends upon other factors

The energy density for capacitor is

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1/2 ∈_oE²

1/2 ∈_rE²

1/2 ∈_r∈_oE²

1/2 ∈_o∈_rE

Linear momentum is a vector quantity and has direction of

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Its displacement

Velocity

Acceleration

None of these

The forces which forms a couple

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Can be replaced by a single equivalent force

cannot be replaced by a single equivalent force

Are perpendicular to each other

All of these

How large a force is required to accelerate a body of weight 5 N with 4 ms^-2 is

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10 N

5 N

2 N

1 N

For a gas obeying Boyle's law, if the pressure is doubled the volume becomes:

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One half

Double

Four times

None of these

The final image obtained by astronomical telescope is

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Inverted w.r.t object

Magnified

Virtual

All of them

Earth receivers huge amount of energy directly from

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Water

Moon

Sun

None of these

For the sustained interference of light the necessary condition is that the two sources should

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Have constant phase difference

Be narrow

Be close to each other

Of same amplitude

Which one of the following particles projected perpendicular to a uniform magnetic field with the same velocity will be deflected least?

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Electron

Proton

Deuton

None of these

If the mass of the body is M on the earth surface, then the mass of the same body on the moon

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M/6

Zero

M

None of these

Amorphous solids are more like

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crystalline solids

polymeric solids

glassy solids

any one of them

A piece of copper and another of germinium are cooled from room temperature to 80K. The resistance of

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Each of them increases

Each of them decreases

Copper increases and germanium for

Copper decreases and germanium increases

Work done by 1kg of water when it falls through the height of 10m is

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98 j

9.8 j

100 erg

9800 erg

If moon radius 1600 km and g on its surface is 1.6 ms^-2Then the escape velocity on the moon is

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1600 ms^-1

50.6 ms^-1

50.8 ms^-1

2263 ms^-1

Critical angle of light passing from glass to air is minimum for

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Red

Green

Yellow

Violet

If a gymnast sitting on a rotating table with his arms out stretched suddenly lowers his hands

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The angular velocity decreases

The moment of inertia decreases

The angular velocity remains constant

The angular momentum increases

Energy stored in a capacitor is

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E = 1/2 C²V²

E = 1/2 C^-1V²

E = 1/2 CV²

E = C²V²

The ‘emf ’ is always even when no current is drawn through the battery of the cell:

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Zero

Present

Absent

Maximum

For earth the escape velocity is 11.2 kms^-1. For a planet whose mass and radius are twice those of the earth, the escape velocity will be

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44.8 kms^-1

22.4 kms^-1

11.2 kms^-1

2.8 kms^-1

A motor runs at 20 rev/s and supplies a torque of 75Nm. Power delivered by it is

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6.12 hp

12.6 hp

7.3 hp

8.3 hp

Distance covered by a freely falling body in one second is

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9.8m

4.9m

2.7m

3.9m

For which color of light the refractive index of glass is larger

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Red

Green

Blue

Violet

The base of equation of continuity is on the

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First law of motion

Law of conservation of mass

Law of conservation of charge

Law of conservation of momentum

The internal energy of a gram mole of an ideal gas depends upon

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Pressure alone

Volume alone

Temperature alone

Both pressure and temperature

Young's modulus for glass is

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15

35

39

55

With the rise of temperature the amplitude of atoms

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Slow down

Fixed

Increases

None of these

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1 PV

2 PV

1/2 PV

Zero

The typical speed of Moon around the Earth is

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1000 ms^-1

2000 ms^-1

3000 ms^-1

4000 ms^-1

The typical speed of human running is

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1 ms^-1

2 ms^-1

4 ms^-1

5 ms^-1

One erg is equal to

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10⁵j

10^{7 j}

10^-3 j

10^-7j

Which does not show polarization

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Longitudinal wave in gas

Transverse wave in gas

Both a and b

None of these

A constant volume gas thermometer is more sensitive than liquid thermometer because

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Gas expand more than liquid

Gases are easily obtained

Gases are much lighter

Gases do not easily change their state

Which one is not correct representation?

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5N

3 Newton

5 Newton

both a and b

If the diameter and mass of the earth become two times their present values, then the weight of an object on the surface of the earth will

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Remain unchanged

Become half

Become one fourth

Be doubled

Time between the normal heart beats is

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8 × 10^-1 sec

_{8 × 10}^-2_sec

8 × 10^-3 sec

None of these

Charles Coulomb measured the force between two charges in

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1860 AD

1890 AD

1874 AD

1871 AD

An inertial frame of reference in which acceleration is

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Very high

Very very low

Zero

None of these

Newton's laws are adequate for speeds that are

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low compared with the speed of light

equal to the speed of light

greater than the speed of light

all of them

To demonstrate the phenomenon of interference we require two sources that emit radiation

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Of same frequency

Different wavelength

Of the same frequency and having definite phase relationship

Of nearly the same frequency

The speed of light in a medium depends upon

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Its wavelength

Its frequency

Refractive index

All of these

Intensities of the two waves of light are I and 4I.The maximum intensity of the resultant wave after superposition is

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5I

9I

16I

25I

Which theory of gravitation is better

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Einsteins

Newtons

Lapalces

None of these

Two wave of intensities I an 4I superpose then the maximum and minimum intensities are

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5I and 3I

9I and I

9I and 3I

5I and I

The distance from Earth to Sun is

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10⁹ m

10⁸ m

10¹⁰ m

10¹¹ m

Fraunhofer spectrum is a

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Line absorption spectrum

Band absorption spectrum

Line emission spectrum

Band emission spectrum

Rainbow is formed due to combination of

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Dispersion and total internal reflection

Reflection and refraction

Dispersion and focusing

Refection and scattering

Light appears to travels in straight lines since

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It is not absorbed by the atmosphere

It is reflected by the atmosphere

Its wavelength is very small

Its velocity is very large

Fringe spacing ΔY is the distance between two adjacent bring fringes on the screen is

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ΔY = Lλ/d

ΔY = Ld/λ

ΔY = dλ/L

ΔY = Lλ/d m

Which of the following graph represents the velocity of a spherical body falling through a viscous medium

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When light passes through a tourmaline crystal, it becomes

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plane polarized

directly polarized

un-polarized

spherically polarized

The particles equal in mass or greater than mass of protons are called:

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Leptons

Mesons

Baryons

Quarks

Near and far points of a healthy human eye respectively are

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0 and 25 cm

0 and infinity

25 cm and 100 cm

25 cm and infinity

In crystalline solids, atoms are held about their equilibrium positions depending upon the strength of:

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Adhesive forces

Nuclear forces

Inter atomic cohesive force

Electromagnetic force

None of these

In Young's double slit experiment, the widths of dark and bright fringes are

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different

equal

zero

variable

With the propagation of longitudinal waves through a material medium, the quantitiestransferred in the direction of propagation are:

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Energy, momentum and mass

Energy and momentum

Energy and mass

Energy

Types of physical quantities are

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one

Two

Three

None of these

In the equation PV^γ= constant, the valueγof is unity then the process is

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Isothermal

Adiabatic

Isobaric

Irreversible

Albert A. Michelson devised interferometer is

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1820

1845

1860

1881

The direction of velocity is along the direction of

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Motion

Displacement

Velocity

None of these

Which of the following phenomenon cannot take place if we consider light as longitudinal wave?

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diffraction

interference

polarization

reflection

For keeping a body in circular motion,the force required is

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Centripetal

Centrifugal

Radial

Tangential

If the earth suddenly shrinks to half of its present radius the acceleration due to gravity will be

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g/2

4g

g/4

2g

What is the time taken by light to travel 4 mm in a material of refractive index 3

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4 x 10^-11 s

2 x 10^-11 s

16 x 10^-11 s

8 x 10^-11 s

Mirage is a phenomenon due to

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Reflection of light

Refraction of light

Total internal reflection of light

Diffraction of light

The instantaneous velocity is define as the limiting value ofΔd/Δtwhen the time intervalΔt approaches to

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zero

maximum

minimum

infinity

For a fixed force, larger is the mass of a body, the

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greater is its acceleration

smaller is its acceleration

smaller is its weight

zero is its acceleration

A prism splits a beam of white light into its seven constituent colors.This is so because

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Phase of different colors is diferent

Amplitude of different colors is different

Energy of different colors is different

Velocity of different colors if different

Which of the following substances possesses the highest elasticity?

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Al

Copper

Steel

Rubber

When a crystal is subjected to stress, it tends to break or fracture along definite direction which is characteristic of a simple. This is called

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Cleavage

Allotropy

Isotropy

None of these

When we consider the average velocity of a body, then the body is moving in

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straight line

curved line

may be in a straight or curved path

none of them

According to Bernoulli s theorem velocity and pressure

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Are directly proportional

Are inversely proportional

Have no relation

Are equal

The young s modulus for a perfect rigid body is

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Zero

1

Infinite

None of these

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r

r²

r³

None of these

The energy need to magnetize and demagnetize the specimen during the each cycle of magnetizing current is

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Value of current

Value of demagnetizing current

Value of magnetic flux density

Area of the loop

Newton's first law of motion is also known as

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Law of motion

Law of mechanics

law of inertia

None of these

Viscosity of air at 30^oC in Nsm^-2

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0.015 × 10^-3

0.019 × 10^-3

0.151 × 10^-3

0.0179 × 10^-3

Mathematically the vertical velocity component is

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V_fy = Vi cos θ - gt

V_fy = Vi cos θ + gt

V_fy = Vi sin θ - gt

V_fy = Vi sin θ + gt

When a droplet falls through a medium with terminal velocity the acceleration is

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Maximum

Minimum

Constant

Zero

A circular disc rolls down an inclined plane without slipping. What is its rotational kinetic energy

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1/2 MR²ω

1/4 MR²ω²

1/2 M²R²ω²

3/4 M²R²ω²

The materials which are used in selective absorption method to polarize the light are

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chronic substances

organic substances

inorganic substances

diachronic substance

__________ is a cubic pattern having one extra atom or molecule at the centre of each of the six faces of the cube

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Simple cube

Face centered cube

Body centered cube

None of these

The renewable energy source is a biomass which is a

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Rare source

Unlimited source

Potential source

None of these

A steady current is flowing in a conductor of non-uniform cross-section. Thecharge passing through any cross-section per unit time is

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Directly proportional to the area of cross-section

Inversely proportional to the area of cross-section

Proportional to square of the area of cross-section

Independent of the area of cross-section

The ratio of forces between two tiny bodies with constant charges in air and in an insulating medium of dielectric constant k is

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1 : K

K : 1

1 : K²

K² : 1

Reverse process of vector addition is called

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Negative of a vector

Subtraction of vector

Resolution of a vector

Multiplication of a vector

A usual way to obtain a plane wave is to place point source of light at the focus of a

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concave lens

convex lens

both of them

either of them

The speed of sound in air is

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320 ms^-1

323 ms^-1

330 ms^-1

333 ms^-1

A null vector is defined as

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Zero magnitude

Arbitrary direction

Fixed direction

a and b

Capacitor is a device use to store the

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A.C. current

D.C. current

Charge

Voltage

Light year is measured in

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Time

Length

Speed

None of these

The minimum distance between a source and the screen for which a real image is possible with a convex lens is

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Its focal length

Twice the focal length

Four times the focal length

Square of the focal length

The size of the domains in such that they can contain

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10²to 10⁴atoms

10⁴to 10⁸atoms

10⁸to 10¹²atoms

10¹²to 10¹⁶atoms

The approximate efficiency of steam locomotive is

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8%

9%

10%

11%

Mathematically the instantaneous velocity is defined as

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Significant figure in 0.00110

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One

Two

Three

Four

An airplane flies 400 m from north and then files 300 m south and then flies 1200 m upwards then net displacement is

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1200 m

1300 m

1400 m

1500 m

Area between the velocity time graph and time axis is equal to

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Speed of object

Distance covered

Velocity of the object

Acceleration

When V₁ is approximately zero then Bernoulli's equation reduces to

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Torricelli's theorem

Venturi relation

Equation of continuity

None of these

A unit vector may be defined by the

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Surface

Direction by normal drawn vector

Along the direction of surface

a and b

Find the average speed of oxygen molecule in the air at S.T.P

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591 ms^-1

461 ms^-1

396 ms^-1

372 ms^-1

The dimensions of Young's Modulus are

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[ML^-1T^-1]

[ML^-1T^-2]

[MLT^-2]

[ML^-2T^-1]

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3 x 10⁵J

2 x 10⁵J

10⁵J

Zero

The time rate of change of velocity is called

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Initial velocity

Uniform velocity

Accelerations

None of these

A rocket carries its own fuel in the form of a

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Liquid and oxygen

Solid and oxygen

Both

None of these

If solid sphere and solid cylinder of same mass and density rotate about their own axis,the moment of inertia will be greater for

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Solid sphere

Solid cylinder

Both

Equal both

IF the spinning speed of the earth is increased then the weight of the body at equator

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Does not change

Doubles

Decreases

Increases

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Bernoulli's equation

Torricelli's theorem

Venturi relation

None of these

The relative velocity before and after the collision is

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V₁+ V₂= V'₂+ V'₂

V₁- V₂= V'₂- V'₁

V₁- V₂=-( V'₂- V'₁)

None of these

Three coplanar forces acting on a body keep it in equilibrium. They should, therefore be

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Parallel

Non-parallel

Concurrent

Non concurrent

The weight of 100 kg man in an elevator going up with an acceleration of 4ms^-2will be

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908 N

490 N

100 N

1380 N

Close orbiting satellites orbit the Earth at a height of about

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500 km

400 km

300 km

800 km

Period of vibration of an atom in a solid is

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1 × 10^-10 sec

_{1 × 10}^-13_sec

1 × 10^-16 sec

1 × 10^-19 sec

A ball is thrown with a speed of 30 ms^-1_{in a direction of 30}° with the ground. What will be its time of flight?

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3.1 s

1.55 s

0.31 s

15.5 s

If the plane polarized light is incident on the second sheet of Polaroid, no light is emitted when their axes are

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Parallel to each other

Perpendicular to each other

In between two positions

None of these

Which of the following types of optical fibre has a core which rages in diameter from 50 to 1000μm?

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single mode step fibre

multi-mode step index fibre

multi-mode graded index fibre

none of them

By calculating the area under the velocity time graph, we can find the

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Acceleration

Velocity

Distance

None of these

The substance, which exists in two or more crystal forms under different conditions is called:

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Isomorphism Substance

Allotropic substances

True substances

Polymorphous substances

The approximate efficiency of steam turbine is

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35 - 46%

40 - 43%

29 - 36%

30 - 47%

When the radioactive nucleus emits a beta particle, the proton neutron ration:

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increases by one

Remains same

Decreases by one

Decreases by four

In a uniform circular motion

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Velocity and acceleration remain constant

Kinetic energy remain constant

Speed and acceleration change

Only velocity change acceleration remain constant

In YDS experiment using white light

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Colored fringes will be obtained

No fringes will be observed

Alternative bright and dark fringes will be seen

None of these

The magnitude of torque determines its

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Linear acceleration

Angular acceleration

Moment arm

None of these

The potential energy per unit charge is the unit of

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Flux

Electric intensity

Potential difference

None of these

On heating, it becomes a very viscous liquid at almost

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500 C^o

800 C^o

900 C^o

1000 C^o

As the working substance of a heat engine completes a cycle, there is no change in:

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Internal energy

Pressure

Volume

All of these

In case of YDS experiment, the distance of the mth bright fringe on the screen from center is

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Y = (m + 1)λL/d

Y = mλL/d

Y = (m + 1/2)λL/d

None of these

An accurate measurement is the one which has

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Percertainity

Less percentage uncertainty

Less fractional uncertainty

b and c

Minimum number of unequal forces whose vector sum can be zero is

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3

4

2

5

Identify practical use of superconductor

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MRI

Super computer

Magnetic levitation train

All above

Power is defined as

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P = ΔV/Δt

P = ΔW/Δt

P = mV/t

P = mt/V

A particle is moving in a circle with uniform speed v.In moving from a point to another diametrically opposite point.

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The momentum changes by mv

The momentum changes by 2mv

The kinetic energy changes by (1/2) mv²

The kinetic energy changes by mv²

An average energy used by the car-from petrol in its life time

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1 × 10⁹ J

1 × 10¹⁰ J

1 × 10¹¹ J

1 × 10¹² J

A diffraction grating contains 5000 lines per centimeter, its grating element will be

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1 x 10^-4nm

1 x 10^-14m

1 x 10^-14cm

1 x 10^-4cm

Which of the material have largest value of young's modulus

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Copper

Diamond

Aluminum

Iron

The dimensional formula for latent heat is:

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M^°L²T¹

ML²T^-2

MLT^-2

ML²T^-1

The electrons occupying the conduction band are known as

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conduction electrons

free electrons

both of them

none of them

The measure of deformation in a certain solid due to the action of stress is called

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Hooke's law

Mechanical advantage

Stress

Strain

A 1500 kg car has its velocity reduced from 20 ms^-1 to 15 ms^-1 in 3.0 S. How large was the average retarding force

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- 4.5 KN

- 2.5 KN

- 3.7 KN

- 4.3 KN

The band full of electrons, which donot play any part in the conduction process is known as

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Conduction band

Forbidden energy band

Valence band

Completely filled band

Stress may be

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Tensile

Compressive

Shear

All of these

Rocket engines lift a rocket from the earth surface because hot gas with high velocity

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Push against the earth

Push against the air

React against the rocket and push it up

Heat up the air which lifts the rocket.

The speed of light in other material is always

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Greater than c

Less than c

Equal to c

None of these

Which of the following is non-conservative field

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Gravitational field

Frictional field

Electrostatic field

None of these

When a stress changes length, it is called the

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compressional stress

tensile stress

shear stress

any one of them

The valence energy band may be either

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Completely filled

Partially filled

a and b

All of them

A typical rocket ejects the burnt gases at speeds of over

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4000 ms^-1

5000 ms^-1

6000 ms^-1

None of these

The relative permitivity ∈_r for teflon is

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2.1

2.4

2.9

3.0

Two equal forces (P each) act at a point inclined to each other at an angle of 120°.The magnitude of their resultant is

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P/2

P/4

P

2P

One cannot see through fog because

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Fog absorbs light

The refractive index of fog is infinity

Light suffers total reflection at the droplet in a fog

Light is scattered by the droplets in fog

In electromagnetic waves electric and magnetic field ar

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Parallel

Antiparallel

Perpendicular

Sometimes parallel sometimes perpendicular

When small number of atoms from some other suitable element is added to the semi-conductor material, then this process is known as

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impurification

adding

doping

extrinsivity

A collision in which the K.E. is not conserved is called

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Elastic collision

Inelastic collisiion

Both

None of these

Stokes law is strictly obey by

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Ideal fluid

Real fluid

Both A and B

None of these

The stopping potential for a certain metal is 10 volt, the max. Energy of emitted electron is:

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10 J

100 J

1.6 × 10-18 J

1.6 × 10-19 J

The speed of commercial jet (air liner) is

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200 ms^-1

267 ms^-1

327 ms^-1

335 ms^-1

Electrons move in the field from

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Low to high potential

High to low potential

Electric field to magnetic field

None of these

The organic substances which shows optical rotation when they are in solution

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Tartaric acid

Sugar

Alcohol

a and b

Rate of change of momentum is called

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impulse

force

torque

momentum

One degree of thermodynamics scale of temperature is called:

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Celsius

Fahrenheit

Kelvin

Radian

The unit of thermodynamic temperature scale is.

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Kelvin

Celsius

Fahrenheit

None of these

Which one light source can travel faster through optical fibre is

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Infra red

Visible

Ultra violet

All of these

Which of the following can become a good temporarily magnet?

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iron

steel

both of them

none of them

Viscosity of glycerin at 30^oC in Nsm^-2

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6.12 × 10^-3

6.18 × 10^-3

6.29 × 10^-3

6.79 × 10^-3

Two masses m₁ and m₂ have equal momentum their kinetic energies are in ratio of

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m₂: m₁

m²1 : m₂²

m₁: m₂

m₂^{2 :}m²1

The magnitude of the scalar product is

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AB sin Φ

AB cos Φ

AB

None of these

The angular momentum of a body is conserved if

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Force acting on it is zero

Torque acting on it is zero

Force acting on it is constant

Torque acting on it is constant

Stoke s law holds for

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Cubical bodies

Cylindrical bodies

Spherical bodies

Elliptical bodies

if volume of a sphere increases then terminal velocity

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Remains same

Increases

Decreases

None

Crystalline solid do not show

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Sharp melting points

Flat faces

Long range order

Isotropic expansion coefficients

The simplest type of rectification known as half wave rectification is obtained by

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Using a transistor

Suppressing the harmonics in A.C. voltage

Suppressing half wave of A.C. supply by using diode

Using a Coolidge

In the relations d sinθ = nλ, shows that the value of θ depends upon 'n' so the images of different colours are much separated in

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Low orders

Middle orders

High order

None of these

The product of mass flow per second with velocity is

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Momentum

Acceleration

Force

Displacement

Photo cells are used for :

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Security and counting system

Automatic door system

Automatic street lighting

All of these

If the K.E.of a body becomes four times of the initial value.then new momentum will

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Become twice its initial value

Become three times.its initial value

Become four times.its initial value

Remains constant

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

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-2 mv

Zero

2 mv

mv

Such a surface on which all the points have the same phase of vibration is known as

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wavefront

amplitude

displacement

all of them

The weight of the body at the centre of the earth is

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9.8 N

Zero

19.6 N

None of these

Young's modulus for diamond is

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700

913

1100

1120

A unit set is the smallest basic structure which is:

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One dimensional

Two dimensional

Three dimensional

Four dimensional

None of these

A.H Compton studied the scattering of X-rays by loosely bound electrons from a graph target in:

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1905

1911

19251

1923

Which of the fluid has ideal behaviour at low speeds

Choose an answer

Air

Blood

Honey

None of these

Law of conservation of momentum has been verified for the

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Cosmological level

Microscopic level

Submicroscopic level

a and c

The maximum size of an object as seen by the naked eye is obtained when it is placed of

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Far point

Near point

Distant point None of these

The centripetal acceleration is supplied by

Choose an answer

Applied force

Gravity

Initial velocity

None of these

The SI unit of stress is

Choose an answer

Nm²

Nm

dynesm^-1

N

S.I unit of stress is

Choose an answer

N/m

N m

Nm^-2

newton

In a semiconductor,the mobility of holes is

Choose an answer

Greater then electrons

Less than electrons

Equal to electrons

None

The diameter of an atom is

Choose an answer

10^-7 m

10^-10 m

10^-12 m

10^-14 m

the equation F = ma, the mass 'm' is

Choose an answer

rest mass

variable mass

inertial mass

gravitational mass

The conductivities of conductors (metals) have

Choose an answer

10⁵ (Ω)^-1

10⁷ (Ωm)^-1

10⁸ (Ωm)^-1

10⁹ (Ωm)^-1

In an isothermal process, the change is internal energy is

Choose an answer

Maximum

Zero

Very small

None of these

A non-inverting amplifier has infinite input resistance then the voltage gain of noninverting amplifier will be:

Choose an answer

Zero

Infinite

One

100

A positively charged particle is moving perpendicular to a uniform magnetic field. The magnetic force makes the particle to move along:

Choose an answer

An elliptical path

A circular path

A parabolic path

None of these

In an astronomical telescope is the objective has the focal length f_o is

Choose an answer

Small

Very small

Long

None of these

When the density is constant for the steady flow of incompressible fluid equation of continuity becomes

Choose an answer

ρ₁A₁V₁ = ρ₂A₂V₂

ρ₁m₁A₁V₁ = ρ₁m₁A₂V₂

A₁V₁ = A₂V₂

None of these

A peptide having molecular mass of more than 10,000 is called as

Choose an answer

Fat

Vitamin

Carbohydrate

Proteins

Areal gas obeying Van der Waal's equation will resemble ideal gas ilf the:

Choose an answer

both a and b are large

both a and b are small

a is small and b is large

a is large and b is small

London forces are more affective at

Choose an answer

low temperature

high temperature

low pressure

low temperature and high pressure

Spectrometry method is applicable if a reactant or a product absorbs radiation

Choose an answer

Ultraviolet

Visible

Infrared

Any of these

Molar mass of high molecular w.f. polymers ranges from:

Choose an answer

1000 to 10000

10000 to 100000

100000 to 1000000

1000 to 1000000

The element with highest E°red

Choose an answer

N

F

O

CI

choose the best example of diffusion of gases:

Choose an answer

vapour condensing on moist surface

spreading of small from a scent bottle

hot air rising above a candle

bubbling in soda bottle

Glycerine is a polar compound. It boils at 290°C under one atmospheric pressure. It should be distilled under reduced pressure due to reason that

Choose an answer

there are strong intermolecular forces between molecules of glycerine

it decomposes at 290°C

low pressure makes the liquid to boil at high temperature

the reduced pressure decreases the boiing point of liquids

The most unsymmetrical one in crystal system is

Choose an answer

triclinic

Li, Na, K

monoclinic

hexagonal

The molecules of air don't settle down. This is due to:

Choose an answer

non-polar nature of gases

different molar mass

elastic collisions of gas molecules

pressure of dust particles in air

How many allotropic forms are present in carbon?

Choose an answer

Two

Four

Three

Five

Which is not a calcareous material?

Choose an answer

line

clay

marble

marine shell

The order of reactivitv of alksI halides towards nucleophile is

Choose an answer

RI>RBr RF>RCI

RF>RCI>RBr>RI

RI>RBr> RCI>RE

RF>RBr>RCI>RI

Heat balance of earth is maintained by sphere:

Choose an answer

Hydrosphere

atmosphers

lithosphere

biosphere

The semi solid wastes in landfills is called:

Choose an answer

Landfill

effluents

Leachate

Incineration

In which of the following techniques rate of reaction is directly related with number ofions

Choose an answer

Spectrometry

Dilatometric method

Conductometric method

Refractometric method

Phosphorus is very useful in the growth of:

Choose an answer

leave

stem

seed

root

Addition of unsymmetrical reagent to an unsymmetrical alkene is governed by

Choose an answer

Cannizzaro's Reaction

Aldol Condensation

Kirchhoff Rule

Markownikov's Rule

Vapour pressure is not affected by

Choose an answer

Surface area

Intermolecular forces

Temperature

Nature of liquid

When the temperature is raised, the viscosity of the liquid decreases.This is because of

Choose an answer

Decreased volume of the solution

Increase in temperature increases the average kinetic energy of molecules which overcome the attractive force between them

Decreased covalent and hydrogen bond forces

Increased attraction between the moelcules

Which of the following is incorrect for glucose & sucrose

Choose an answer

Both are water solube

Natural polymers

Source of energy

Carbohydrate in nature

The % age of nitrogen in ammonia is:

Choose an answer

80%

92%

90%

50%

Poisoning of CO can be reveresed by giving oxygen at pressure:

Choose an answer

low

least

medium

High

Cl₂is a gas while iodine is a solid due to

Choose an answer

stronger London forces with high polarizability

greater electro negativity of Cl than iodine

stronger dipole dipole forces

iodine is colored while chlorine is colourless

Keratin is

Choose an answer

Protein of tendons

Rich in sulfur

Poor in cysteine

Conjugated protein

Amorphous solids

Choose an answer

have sharp melting points

undergo clean cleavage when cut with knife

have perfect arrangement of atoms

can possesses small regions of orderly arrangements of atoms

Isozymes are the enzymes which:

Choose an answer

have similar chemical properties

have similar physical properties

have different physical and chemical properties

Starch is a polymer of

Choose an answer

Sucrose

Fructose

α-D-Glucose

Lactose

Choose the chief air pollutant among the following which depletes ozone layer:

Choose an answer

carbon monoxide

carbon dioxide

chloroflurocarbons and nitrogen oxides

sulphur dioxide

Which of the following bond is responsible for joining the amino acids in proteins?

Choose an answer

Metallic Bond

Di sulfide bond

Peptide Bond

Which of the following tests helps to distinguish between alkyne and alkene?

Choose an answer

Lucas test

Tollen's reagent test

Baeyer's test

Fehling's solution test

Glucose and gulose are ____ for each other

Choose an answer

Geometrical isomers

Metamers

Apimers

None

The examples of a hexagonal system is

Choose an answer

sugar

graphite(a=b not equal to c) {Alpha =beta. not equal to gamma}

sulphur

diamond

The state of matter which exist only within a relatively narrow range of temperature and pressure

Choose an answer

Solid

Gas

Liquid

Plasma

What is clinker?

Choose an answer

Roasted calcareous material

Roasted calcareous & argelarious material

Roasted argillaceous material

Roasted gypsum

NH₃gas is liquefied more easily than N₂Hence

Choose an answer

Van der Waals constants a and b of NH₃> that of N₂

Van der Waals constants a and b of NH₃< that of N₂

a(NH₃) > a (N₂) but b (NH₃) < b(N₂)

a (NH₃) < a (N₂) but b (NH₃) > b (N₂)

Kerosene is liquid at room temperature.This is due to:

Choose an answer

organic nature

H-bonding

molecular size

dipole-dipole forces

One Joule is equivalent to

Choose an answer

4.184 cal.

0.4184cal.

1/2 cal.

1/4.184 cal

What is the co-ordination number of face centered cubic structure?

Choose an answer

12

8

6

10

Choose the gas law which gives relationship between volume and pressure:

Choose an answer

Bolye,s law

Graham,s law

Dalton,s law

Charles,s law

Which of the following equation is for idea gas:

Choose an answer

PV = dRT

PR = nTP

PM = nRT

PV = nRT

If a = b = c and x = y = z 90° then crystal structure is

Choose an answer

Cubic

Tetragonal

Orthorhombic

Triclinic

As the number of carbon atoms increases the number of isomers also increase. The 5 C compound pentane has as many as

Choose an answer

3 isomers

5 isomers

6 isomers

10 isomers

Photochemical smog consists of higher concentration of:

Choose an answer

Oxidants

Ozone

a & b

NO₃

Which of the following is the unit for pressure of a gas in system international

Choose an answer

Nm^-2

mm of Hg

atmosphere

torrr

A pollutant affects

Choose an answer

Human affects

Quality of life

Functioning of ecosystem

All of these

The density of a gas is 1.964 g dm-³ at 273K and 76 cm Hg The gas is

Choose an answer

CH₄

CO₂

C₂H₄

Xe

The deviation of a gas from ideal behaviour is maximum at

Choose an answer

-10°C and 5.0 atm

100°C and 2.0 atm

-10°C and 2.0 atm

0°C and 2.0 atm

Boron, aluminium, gallium, indium and thallium belong to group lll-A of the periodic table show a decrease with increasing relative atomic mass:

Choose an answer

Ionic character of the compounds

The first ionization energy

The basic character of the oxides

The stability of +2 oxidation

Coagulation removes suspended particles in ran water:

Choose an answer

60%

70%

80%

90%

Which of the following processes has always. ∆H=-ve

Choose an answer

Formation of compound

Dilution of a solution

Dissolution of ionic compound

Combustion

Boiling point of water remains 100°C although heat is continuous supplied. it is because

Choose an answer

decomposition of water takes place

hydrogen bonding is increased

external atmospheric pressure is not changing

kinetic energy of H₂O molecules is increasing

Which of the following undergoes easy dehydration?

Choose an answer

3-MethyIbutan-2-ol

Ethanol

2.Methylpropan-2-ol

Methanol

NaOH+HCI- NaCI+ H2O. Enthalpy change in the above reaction is called

Choose an answer

Enthalpy of reaction

Enthalpy of Neutralisation

Enthalpy of formation

Enthalpy of combustion

Coinage metals Cu. Ag, and Au are the least reactive because they have

Choose an answer

Negative reduction potential

Positive reduction potential

Negative oxidation potential

Positive oxidation potential

Insoluble ferric oxide is produced in the pH range:

Choose an answer

1 to 8

6 to 9

3 to 13

8 to 13

The molar volume of CO₂ is maximum at:

Choose an answer

S.T.P. (0^∘C and 1 atm)

127^∘C and 1 atm

0^∘C and 2 atm

273^∘C 2atm

A combination of glucose and fructose is called

Choose an answer

sucrose

table sugar

a & b

Lactose

The force which hold the atoms together to form a compound is called:

Choose an answer

Dispersion forces

London forces

A chemical bond

Ven der wall's forces

A student mixed ethyl alcohol with small amount of sodium dichromate and added it to the hot solution of dilute sulphuric acid. A vigorous reaction took place. He distilled the product formed immediately. What was the product?

Choose an answer

Aceton3

Dimethyi ether

Acetic acid

Acetaldehyde

For a gas the isotherm is the graph between

Choose an answer

V and T

T and P

n and T

P and V

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg Toxic.

Choose an answer

It attaches to sulphur of the disulphide link

Hg is a heavy metal

Hg is liquid at room temperature

Hg is non reactive chemically

C-H bond length in the benzene is

Choose an answer

0.99A°

1.09A°

1.12A°

1.34A°

Enthalpy of a system can be calculated by which of following relationship

Choose an answer

q=ΔΕ

q=m×S×∆T

q=pv

q=m×v×∆T

which one of the following statements bout negative ions is incorrect?

Choose an answer

they are also know as anions

they are formed when atoms gain electrons

they are large than the atom from which they were formed

they are smaller than the atom from which they were formed

Polymorphism is shown by AgNO3. Which one of the following options is true for AgNO3?

Choose an answer

Orthorhombic and rhombohedral

Cubic and orthorhombic

Cubic and tetragonal

Monoclinic and hexagonal

Oxidation state of Mn' in KMnO4. K2MnO4, MnO2 and MnSO4 is in the order

Choose an answer

+7.+6.+2,+4

+6,+7,+2,+4

+7. +6.+4.+2

+4, +6, +7,+2

The volume of gas depends upon the ______ molecules

Choose an answer

Size of

Molecular weight

Space between

Both a and b

Lipids are naturally occurring compounds produced in cell and are water insoluble but soluble in organic solvents. One of the followings is not a lipid. Select among the following

Choose an answer

Nucleic acid

A triglyceride

Sterol

Vitamin D

Amorphous substance show

(i) Short and long range order

(ii) Short range order

(iii) Long range order

(iv) Have no sharp melting point

Choose an answer

(i) and (ii) are correct

(ii) and (iv) are correct

(ii) (iii) and (iv) are correct

(i) and (iv) are correct

Which one is non-reducing sugar?

Choose an answer

sucrose

glucose

fructose

galactose

Which of the following is sweetest sugar

Choose an answer

Glucose

Maltose

Fructose

Sucrose

Zn has

Choose an answer

Zero unpaired electrons

Three unpaired electrons

Five unpaired electrons

One paired electrons

Smell of cooking gas during leakage from gas cylinder is detected because of the property of:

Choose an answer

Effusion

Evapotration

Diffusion

Conduction

One dm3 of H2 and O2: has different masses but no. of particles are

Choose an answer

same

H2 has greater

different

O2 has greater

The maximum hydrogen bonding is in:

Choose an answer

diethyl ether

ethanol

water

benzene

Optimum PH for enzyme pepsin is

Choose an answer

01

2

05

6.5

Which of the following amino acid is named due to its taste

Choose an answer

Alanine

Lysine

Valine

Glycine

Types of bonds between C terminal and N terminal is

Choose an answer

Covalent

Disulphide bond

Peptide

Ionic

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

Choose an answer

SO₂

NO₂

CO

a and b only

Which of the following are thermoplastic materials?

Choose an answer

PVC

polystyrenes

polyethylene

all these

An amion acid exists in the form of Zwitter-ioin which has:

Choose an answer

one + ve charge

one - ve charge

one +ve and -ve charge

two +ve charge

All of the following are polar amino acids except

Choose an answer

Serine

Glutamate

Arginine

Alanine

Plastic are a pollution problem because many plastics

Choose an answer

Burn to produce toxic fumes

Decompose to produce toxic products

Are made from petroleum

Are very inflammable

Potable water is considered to be

Choose an answer

Safe for human consumption

The ground water

The surface water

Now safe for human consumption

On hydrolysis sucrose gives

Choose an answer

Glucose and maltose

Fructose and lactose

Fructose and maltose

Glucose and fructose

Consider the reaction

PCI5 (g) <---------> PCl3 (g) +Cl2 (g) in a closed container at equilibrium. At a fixed temperature, what will be the effect of adding more PCl5 on the equilibrium constant

Choose an answer

It increases

It remains unaffected

It decreases

Can't be predicted without Ki

Which element of group V-A and VII-A does not use d-orbital?

Choose an answer

Nitrogen

Sulphur

Arsenic

Chlorine

Keeping the temperature constant, if the gas is expended:

Choose an answer

Kinetic energy of molecules will increase.

Number of gas molecules increases.

Temperature will increase.

Pressure will decrease.

The amino group in 19 alpha-amino acids is primary; only one alpha-amino acid has secondary amino group which one is that

Choose an answer

Alanine

Glutamic acid

Glycine

Proline

Which attractive forces cause molecular solids to be formed?

Choose an answer

lonic

Metallic

Covalent

van der Waals

Photo chemical smog contains _________ as main reactants:

Choose an answer

nitrons oxide and unburnt hydrocarbons

niliric oxide and unburnt hydrocarbons

NO and burnt hydrocarbons

N₂O and burnt hydrocarbons

Liquids evaporate at every temperature. When the temperature becomes constant for a liquid, then:

Choose an answer

rate of evaporation is greater than the rate of condensation

the rate of condensation is greater than the rate of evaporation

The rate of condensation and evaporation become equal

it depends upon the nature of the liquid

For incineration temperature range is (in ^oC)

Choose an answer

700-800

800-900

900-1000

1000-1100

The boiling points of the halogens

Choose an answer

increases down the group

decreases down the group

remains constant

can not be predicted

An instrument which is used to measure the pressure of a gas is called:

Choose an answer

barometer

photometer

stalagmometer

viscometer

Which of the following is a simple protein

Choose an answer

Albumins

Legumin

Callogen

All

Caseinogen is

Choose an answer

Simple protein

Derived protein

Phosphoprotein

Rich in sulfur containing amino acids

The rate diffusion of H₂is 4 times than the of an unknown gas at same temperature and pressure, the molecular mass of unknown gas is

Choose an answer

32

16

4

64

If there are weak intermolecular forces in a liquid, it will be

Choose an answer

more volatile

less volatile

more dense

less heavy

A pressure of 1Nm^-2 is equal to:

Choose an answer

one bar

one pascal

stalagmometer

one aomosphere

Solids in which atoms, ions or molecules are not regularly arranged are

Choose an answer

crystalline solid

amorphous solids

liquid crystals

low melting points

What is the effect of polluted air on environment:

Choose an answer

ozone

acid rain

global warming

smog

What water freezes at 0∘ , Its density decreases dues to:

Choose an answer

cubic structure of ice

empty spaces present in the structure

change of bond lengths

change of bond angles

In a period the atomic radii

Choose an answer

increase

decrease

remain same

first increase, then decreased

The specifie substance (metabolite) that fits on the enzyme surface and is converted to products is called

Choose an answer

Co-factor

Isoenzyme

Prosthetic group

Substrate

Potassium fertilizers are especially useful for:

Choose an answer

Tobacco

Potato

Coffee

All of these

Molar mass of repeating unit of PVC monomer is:

Choose an answer

43

53

63

73

Out of total amount of water available for human use is

Choose an answer

0.30%

0.2%

40%

50%

Esters have fruity smell and are used as artificial favours. Amyl acetate gives flavour of

Choose an answer

Banana

Jasmine

Pineapple

Orange

Dipole-induced dipole forces are also called

Choose an answer

dipole-dipole forces

ion-dipole forces

Debye forces

London-dispersion forces

Calendar stock is process in paper making in which

Choose an answer

Moisture is removed

Pulp is spreaded over fabric or screen

Paper thickness is removed

Paper is wounded in the form of reel

The compound that has zero dipole moment is

Choose an answer

HCl

H₂S

NH₃

CH₄

The temperature in the incineration of industrial and hazardons waster process had a range:

Choose an answer

950 to 1300°C

500 to 900°C

250 to 500°C

900 to 1000°C

The relationship which describes the variation of vapour pressure with temperature is called

Choose an answer

Hess's law

Arrhenius equation

Kirchhoff's law

Clausius-Clapeyron equation

which of the following d blocks element can showthe highest oxidation number is its ompound

Choose an answer

Chromium

iron

Copper

Manganese

During the manufacturing process of cement the temperature of the decomposition zone goes up to

Choose an answer

600°C

800°C

1000°C

1200°C

The gas which obey's the gas laws at all conditions of temperature and pressure is called:

Choose an answer

Perfect gas

Super gas

Ideal gas

Real gas

When two ice cubes are pressed together they unite to form one cube. Which of the following forces is responsibles for holding them together

Choose an answer

Van der Waal's

covalent bonding

hydrogen bonding

dipole-dipole interaction

When a compressed gas is allowed to pass through a nozzle of a jet into a region of low pressure, it produces

Choose an answer

cooling

vaporization

fusion

expansion

The ratio of most probable velocity to that of average velocity is

Choose an answer

π/2

2/π

√π/2

The mechanism of polymerization involves free radical addition polymerization or condensation polymerization. Choose the correct statement

Choose an answer

Polyester is an addition polymer

Polythene is an addition polymer

Polyvinyl chloride (PVC) is a condensation polymer

Polystyrene

Which one of the following statements about positive ions is incorrect?

Choose an answer

they are also known as cations

they are formed when electrons are removed from atoms

they are larger than the atom from which hay were formed

they are smaller than the atom from which they were formed

Keratomalacia is caused due to the deficiency of vitamin

Choose an answer

A

K

B

D

N terminal of glutathione is

Choose an answer

Glycine

Cysteine

Glutamate

Aspartate

Which ion is most polarising?

Choose an answer

AI³⁺

Ba²⁺

Mg²⁺

Na⁺

What is the formula of talc or soapstone?

Choose an answer

Na2B4O7.10H2O

H2Mg3(SiO3)4

Cu2S

NaNO3

Ecosytem is a smaller unity of:

Choose an answer

nydosphere

biosphere

lithosphere

atmosphere

All the following statements are incorrect except:

Choose an answer

all of the gases cannot be liquefied

increase of pressure will not decrease the inter molecular distance in a gas

gas molecules do not attract each other at very low temperature

actual volume of a gas is not negligible at very pressure

The particles in solids are

Choose an answer

widely separated and moving randomly

widely separated not moving

moving randomly but not separated

close together and vibrating slightly

The enzymes that catalyse the addition or removal of ammonia are:

Choose an answer

Lyases

Ligases

Transferases

Kinses

Nucleic acid fist descovered in

Choose an answer

1868

1869

1900

1905

Ozone is present in layer around earth:

Choose an answer

atmosphere

tropospher

stratosphere

thermosphere

Rise in vapour pressure of water from 30 to 60°C is only 32 torr to 149.4 torr (117.4 torr) but from 60 to 90°C is 149.4 to 527.8 torr (378.4 torr).it is due to

Choose an answer

change in geometry of H₂O molecules at higher temperature

decrease in volume takes place at higher temperature

vapour pressure of liquids increases rapidly closer to their boiling points

boiling starts

The root mean square velocity of a gas is doubled when the temperature is

Choose an answer

reduced to half.

reduced to one-fourth

increased four times

inereased two times

Suspended matter is settled in purification of water by:

Choose an answer

aeration

coagulation

chlorination

treatment

The volume of a gas that is occupied by its one mole at S.T.P. is known as:

Choose an answer

atomic volume

molar volume

normal volume

total volume

There are _________ types of solids

Choose an answer

1

2

3

4

Water bodies are included in:

Choose an answer

Atmosphere

Hydrosphere

Lithosphere

All of these

Transition compounds which occur as tripositive ions have no

Choose an answer

4s-electron

3p-electron

3s-electron

2s-electron

The elements of group I-A react violently with water and make the solution

Choose an answer

neutral

amphoteric

acidic

alkaline

Major cause of SO2 on global scale is

Choose an answer

Volcanoes

Electric sparks

Combustion

All

Pan is an irritant to human beings and it affects

Choose an answer

Eyes

Nose

Hair

Skin

Which process of pulp making is mostly used in Pakistan?

Choose an answer

Kraft process

Sulphite process

Neutral sulphite semi chemical process (NSSC)

All of these

The slope of the graph is steepest at the beginning of reaction showing

Choose an answer

Rapid decrease in concentration of reactants

Rapid increase in concentration of reactants

Fast rate of reaction

All of the above

Property due to which water acts as a universal solvent is

Choose an answer

Polarity

It's ability to make hydrogen bond

Both A and B

Strong dipole dipole interaction

The intramolecular forces in gases are:

Choose an answer

Weak.

Normal.

Very weak.

Strong.

Which one of the following has zero dipole moment

Choose an answer

NH3

CHCI3

H2O

BF3

The eleventh concentration of metal cause clogs of gills in fish:

Choose an answer

Al

He

Pb

Ca

Density of a gas is usually expressed in

Choose an answer

Kg m³

Kg dm³

g dm^-3

g cm^-3

Carboxylic acid is more acidic than phenol because of the greater stability of

Choose an answer

Carboxylic acid

Phenoxide ion

proton

Carboxylate ion

Helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is

Choose an answer

same as that of a hydrogen molecule

half that of a hydrogen molecule

two times that of a hydrogen molecule

four times that of hydrogen molecule

Formic acid is given name from Latin word a "formic" which means:

Choose an answer

Red out

Vinegar

Butter

Milk

Liquefaction of gas can only be carried out if the:

Choose an answer

without caring for the value critical volume at critical stage

the temperature is more than critical and pressure is 1000 atm

the temperature is below the critical and pressure is very high

temperature is above the critical temperature and pressure can have any value

Enzymes are

Choose an answer

simple proteins

derived proteins

compound proteins

conjugated proteins

Iodine number of an oil indicates its:

Choose an answer

molecular weight

purity

degree of unsaturation

acidic strength

Which of these the most widely used nitrogen fertilizer in Pakistan?

Choose an answer

urea

ammonium nitrate

ammonium sulphate

ammonium chloride

Polar ice caps can melt due to

Choose an answer

Acid rain

Green House Effect

Smog

Chlorofluorocarbons

Properties of polymeric material depends upon

Choose an answer

Chemical composition

Structure of molecule

Boiling point

Both A and B

In which one of the following does the central atom not possess an 'octet' in its outer shell?

Choose an answer

BH₃

CH₄

NH₃

H₂O

Ozone gas has boiling point:

Choose an answer

Low

High

Medium

Highest

Optimum temperature for enzyme activity is

Choose an answer

125°C

37°C

40°C

100°C

Which one of the following is co-polymer

Choose an answer

PVC

PVA

Polystyrene

Terylene

Which one of the following statements about sodium chloride is incorrect?

Choose an answer

it has a high melting point

it conducts electricity at room temperature

it is soluble in water

it is brittle

Boyle's law does not fall even:

Choose an answer

Temperature is extremely high.

Pressure is extremely high.

Mixture of gases is taken.

All of above.

The main pollution of leather tanneries in the waste is due to the salt of

Choose an answer

Chromium

Copper

Chromium

Lead

The bond angle between any two sp hybrid orbitals is A.109.28°

Choose an answer

107.09°

120°

90°

80°

The respiration process taking place in animals depends upon a difference in:

Choose an answer

vapour pressure

osmotic pressure

partial pressure

atmospheric pressure

Which one of the following is a disaccharide?

Choose an answer

glucose

sucrose

fructose

starch

In purification of potable water the coagulant used is:

Choose an answer

Nickel sulphate

Copper sulphate

Barium sulphate

Aluminium sulphate

The basic difference between synthetic and natural fertilizer is in their

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raw material

crop application

usage

shapes

Condensation occurs between amino acids with the elimination of

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H₂O

H₂

O₂

NH₃

Amount of fresh water used by agriculture is

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2%

23%

69%

97%

The proteins which give an amino acid and non-protein group on hydrolysis are known as

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Derived protein

Albumins

Conjugated simple protein

Conjugated protein

Proteins are classifies into ______ classes based on physic-chemical properties

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2

3

5

9

Enzymes are chemically

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carbohydrates

proteins

fatty acids

phospholipids

Which of the following polymers is used for weather resistant paints

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acrylic resins

polyvinyl acetate

polystyrene

PVC

Enzymes consist of

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proteins only

proteins and non-protein parts

fats only

futs and non-fatty components

The crystal system are of

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7 types

10 types

5 types

8 types

The heat of hydrogenation of most of the alkene is about

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120 kJ/mol

100 kJ/mol

140 kJ/mol

105 kJ/mol

At present the number or cement factories in Pakistan are:

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20

22

25

30

Which of the following solids has a simple molecular lattice?

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magnesium oxide

sodium

silicon(IV) oxide

sulphur

Vegetable oils are

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Unsaturated fatty acids

Glycosides of unsaturated fatty acids

Glycosides of saturated fatty acids

None

One of the best applications of Hess's law to calculate the lattice energy of ionic compound is

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Measurement of enthalpy change in a calorimeter

Studying of first law of thermodynamics

Measurement of a heat of formation of a compound

Born-Haber cycle

The overall effect of the photochemical smog in the after noon is built up of

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Neutralization

oxidizing agent

Reducing agent

Activating agent

Which of the following configurations corresponds to alkaline earth metals?

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[Ar] 3d10, 4s2

[Ne] 3d2, 3p2

[Ar] 4s2

[Ar], 3d10, 4s1

Which of following is NOT use the polyvinylacetate (PVA)

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An adhesive material

Binder for emulsion

Used as gramophone

None as these

Lysine

Choose an answer

Basic Only ketogenic

Ketogenic glucogenic

Acidic glucogenic

Non essential

Factors affected denaturation of proteins:

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Change in temp and pH

Strong reducing agent

Strong oxidizing agent

All of these

Which of these are isomrophous to one another NaCl, NH₄Br, K₂CrO₄, K₂SO₄

Choose an answer

NaCl and NH₄Br both cubic

NH₄Br and K₂SO_{4 both tetragonal}

K₂CrO_{4 and}K₂SO₄orthorhombic

NaCl and K₂SO₄both rhobohedral

The reason of acid rain is:

Choose an answer

release of CO in excess by in complete combustion

excess release of NO₂ and SO₂ from burning of fossil fuels

Formation of NH₃ in excess form industry and coal gas

Formation of excess CO₂ due to combustion and respiration

Pressure remaining constant at which temperature the volume of a gas will become twince of what it is at 0∘C.

Choose an answer

546∘C

200∘C

546K

273K

Vegetable oil are

Choose an answer

unsaturated fatty acids

glycerides of unsaturated fatty acids

glycerides of saturated fatty acids

essential oil obtained from plants

In which of the following compounds hydrogen bonding is not present

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water

ethanol

ether

ammonia

The highest temperature above which a gas cannot be liquified no matter how much pressure is applied, is called as

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critical temperature

absolute zero

liquefaction temperature

boiling point

The volume of an ideal gas is decreased to half, What will happen to the force exerted on the walls of the container by the gas particles?

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the force is halved

the force increases by a factor of 4

the force remains constant

the force increased by a factory of 2

Water has high boiling point which is due to:

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high electric constant

weak dissociation

high specific heat

H-bonding between its molecules

The rate of diffusion of a gas is proportional to

Choose an answer

P /√d

√p/d

P/d

√ P/d

Macromolecules or polymers are large molecules built up from small m0lecules known as monomers.This hypothesis put forward by:

Choose an answer

Newton

schrodinger

Lewis

Stadinger

Relationship between volume of a gas and prevailing conditions of temperature and pressure are called

Choose an answer

Gas laws

Equilibrium laws

Rate laws

None of these

Which is not the condition for the formation of smog

Choose an answer

there must be sufficient NO gas

there must be sunlight to help photo chemical reactions to take place

air must be blowing swifty

there must be SO₂in the air

Lumen of the cristae is the part of

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Inner membrane

Outer membrane

Inner compartment

Outer compartment

The vector in case of Trypanosoma

Choose an answer

Mosquito

House fly

Tsetse fly

None of these

For vaccination Edward jenner removed material from which?

Choose an answer

Small pox lesion

Cow pox lesion

Chicken pox

All of these

E. coli are

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Cocci

Bacilli

Spiral

None of these

Which of the following is a messenger of both chemical and nervous coordination

Choose an answer

Acetylcholine

Dopamine

Epinephrine

Serotonin

Choose the right synonyms

Caliph

Choose an answer

Muslim religious ruler

a deputy commissioner

a district administrator

a justice

If a __________ is not present, the meeting must be adjourned.

Choose an answer

Quorum

Quarter

Quiz

Quota

MUFFLE

Choose an answer

Wrap

Soften

Hasten

Disturb

Urbane?

Choose an answer

Well-dressed

Friendly

Polished

Prominent

I am____forward to our picnic scheduled in the next month.

Choose an answer

Looking

Planning

Seeing

Going

Organizing

The sergeant lifted an ______ finger at us

Choose an answer

Acoustic

Cross

Admonitory

Imperfect

The tapeworm is an example of ______ organism, one that lives within or on another creature, deriving some or all of its nutrients from its host

Choose an answer

A hospitable

A parasitic

A protozoan

An exemplary

INDUSTRIOUS

Choose an answer

Intelligent

Hard working

Clever

Reserved

Aboriginal

Choose an answer

modern

ancient

fabricated

implored

Choose the right synonyms

Complacent

Choose an answer

anxious

eager

contended

oblivious

Choose the right synonyms

Facile

Choose an answer

arduous

burdensome

effortless

challenging

captivities

She hopes to ______ her sister's sporting achievements

Choose an answer

Emulate

Simulate

Cooperate

Separate

Cholera is mainly ______ through contaminated food and drinks

Choose an answer

Conducted

Transferred

Circulated

Transmitted

Aerodynamics

Choose an answer

Science dealing with the forces of acting on solid bodies moving through air

science dealing with the growth of plants

science dealing with the purification of environment

science dealing with the animal life

Several members of party eulogizedtheir leaders at the public meeting.

Choose an answer

Thanked

Praised

Wished

Flattered

Choose the right synonyms

Yin and Yang

Choose an answer

male and female principles of the universe

the Japanese king and queen

the Korean king and queen

the Chines king and queen

the Egyptian king and queen

Choose the right synonyms

Melange

Choose an answer

separation

mixture

fusion

isolation

reduction

Choose the right synonyms

Catacomb

Choose an answer

residence

tomb

mansion

palace

Choose the right synonyms

Predatory

Choose an answer

hunting

rescue

animate

elemination

cattle-rearing

Choose the right synonyms

Inanity

Choose an answer

fullness

emptiness

wisdom

intelligence

approximation

Dowry is no longer permitted by law even in____marriage.

Choose an answer

Natural

Bigamous

Love

Conventional

Polygamous

The newest fiber optic cables that carry telephone calls cross. country are made of glass so ______ that a piece 100 miles thick is clearer than a standard windowpane

Choose an answer

Fragile

Immaculate

Tangible

Transparent

Choose the appropriate word

Nobody knew about his achievement. He is a ----------------------

Choose an answer

Blockheaded

dark horse

lion

wolf

Altruistic

Choose an answer

selfish

self-sacrificial

miserly

cowardly

Choose the right synonyms

Scuttle

Choose an answer

bustle

slow

paralyse

halt

jam

ADMIT

Choose an answer

Decide

Realise

Accept

Commit

The purchaser should avoid asking for ______ information

Choose an answer

Suppliant

Superfluous

Surreptitious

Sycophant

The aim of the report is to ______ the main points of the new regulations

Choose an answer

Emigrate

Emulate

Elucidate

Embarrass

Choose the right synonyms

Raze

Choose an answer

construct

renovate

demolish

possess

affirm

Choose the right synonyms

Pedestrian

Choose an answer

walker

occupant

lame

crippled

dormant

WELTER

Choose an answer

Sacrifice

Clarity

Height

Confusion

Most rulers wished to ______ Alexander the Great

Choose an answer

Emulate

Guile

Gullible

Hackneyed

Choose the right synonyms

Debut

Choose an answer

last performance in public

first performance in public

popular performance in public

popular performance in public failure

Choose the right synonyms

Vale

Choose an answer

forest

desert

valley

mountain

turf

Her novel published to universal acclaim, her literary gifts acknowledged by the chief figures of the Harlem Renaissance, her reputation as yet ______ by envious slights, Hurston clearly was at the ______ of her career

Choose an answer

Undamaged .... Ebb

Untarnished .... Zenith

Untainted ..... extremity

Blackened ..... Mercy

Choose the appropriate word

After the accomplishment of the task she felt --------------------------

Choose an answer

Perturbed

Complacent

Anxious

Restless

Choose the appropriate word

Parents and children are in affectionate ---------------- to one another

Choose an answer

Discrepancy

Affinity

Compulsion

Thrust

JARGON?

Choose an answer

Unintelligible speech

Exaggeration

Kind of gait

Word game

Acquiesce

Choose an answer

accede

disapprove

oppose

accuse

Choose the right synonyms

Catharsis

Choose an answer

memories

dreams

release of strong feeling

nightmares

Choose the right synonyms

Glib

Choose an answer

close tongued

smooth tongued

shy

diffident

oblivious

Choose the right synonyms

Inscrutable

Choose an answer

expressionless

candid

vivid

glazing

onormous

Choose the right synonyms

Medley

Choose an answer

monotony

assortment

similarity

relevance

depiction

Choose the appropriate word

The tall boy owing to ---------------- succeeded in mounting the cliff.

Choose an answer

diligence

inactivity

sluggishness

avarices

Choose the grammatically correct sentence

The were off to a^A flying start but cannot^B keep up their pace^C NO ERROR^D

Choose an answer

A

B

C

D

Choose the right synonyms

Congeal

Choose an answer

clot

disperse

scatter

spread

Choose the right synonyms

Maneuver

Choose an answer

action

halt

stoppage

facility

hindrance

GADFLY

Choose an answer

Horror

Nuisance

Gain

Blessing

Choose the right synonyms

Disdain

Choose an answer

appreciate

glorify

scorn

remind

Conjecture?

Choose an answer

Grave

Outward

To Guess

To Claim

Your case is so unique that I am not getting any ______ to support it

Choose an answer

Help

Precedent

Reason

Happening

EXORBITANT

Choose an answer

Odd

Ridiculous

Excessive

Threatening

Choose the right synonyms

Sunder

Choose an answer

separate by force forever

unify

accompany

launch

disperse

Choose the right synonyms

Menial

Choose an answer

base

high spirited

glorious

charitable

exuberant

Choose the right synonyms

Cobble

Choose an answer

do actively

put together hastily or clumsily

perform excellently

bring forth

The year 1889 was the ______ of the inauguration of George Washington

Choose an answer

Steel

Cay

Centennial

Trip

A responsible person never finds his obligation ___________ .

Choose an answer

Onerous

Ominous

Omniscient

Opprobrious

The windows were ______ with steam.

Choose an answer

Opaque

Obtuse

Obtain

Clear

DEFLECT

Choose an answer

Frustrate

Cheat

Pervert

Depress

Choose the right synonyms

Chivalry

Choose an answer

defamation

gallantry

timidness

enlightenment

solve as per the directiongiven above

Choose an answer

If I had known

This yesterday

I will have helped him

No error

I tried to give him some good advice but he _________ to listen.

Choose an answer

Refused

Denied

Prevented

Avoided

Choose the grammatically correct sentence

His circumstance^A did not allow him to continue his studies^B when he was young^C NO ERROR^D

Choose an answer

A

B

C

D

Choose the right synonyms

Moot

Choose an answer

vexed

generated

considered

observed

penerated

Choose the appropriate word

In heroic stories we read about ----------------- of great men

Choose an answer

Chivalry

Cowardice

Pitiless

Oblivious

SOLICIT

Choose an answer

Beseech

Demand

Claim

Require

Choose the right synonyms

Classic

Choose an answer

commonplace

ideal

neglected

accustomed

Choose the right synonyms

Elucidate

Choose an answer

conceal

reveal

appeal

kneel

The radars were ________ for further attacks.

Choose an answer

Ruddy

Reconnoitering

Reconnecting

Rotary