Question # 1

Choose an answer

If A=B, then

Choose an answer

A⊂B and B⊂A

A⊆B and B⊈A

A⊆B and B⊆A

None of these

Choose an answer

sin h x

cos h x

sec h x

cosec h x

1 radian = ______

Choose an answer

180°

90°

57.296°

60°

Choose an answer

Associative law of addition

Commutative law of addition

Additive identity

Closure law of addition

99th term of the series 2 + 7 + 14 + 23 + 34 + ..... is

Choose an answer

9998

9999

10000

None of these

Roots of the equation 2x²- 7x + 3 = 0 are

Choose an answer

Rational

Irrational

Complex

None of these

Choose an answer

I quadrant

II quadrant

III quadrant

IV quadrant

Choose an answer

The area of circle of unit radius =

Choose an answer

0

1

4

π

The square root of 2i - 20i is

Choose an answer

±(5 - 2i)

±(5+ 2i)

(5 - 2i)

None of these

Choose an answer

The term involving x⁴ in the expansion (3-2x) is

Choose an answer

217x⁴

15120x⁴

313x⁴

-25x⁴

Choose an answer

A sequence is a function whose domain is

Choose an answer

N

Subset of N

R

None of these

Choose an answer

2

-3/2

1

0

The exact degree value of the function sin-1( -√3/2) is

Choose an answer

70^ο

50^ο

90^ο

60^ο

Cos^-1 12/13 =

Choose an answer

tan^-1 3/5

cot^-1 13/12

Sec^-1 13/12

sin^-1 5/13

Choose an answer

Closure law of addition

Closure law of multiplication

Commutative law of addition

Commutative law of multiplication

For n€ N,2^n>2 > n is to only when

Choose an answer

n<2

n≤ 4

n≥ 4

Which conjunction is not true ?

Choose an answer

To each element of a group there corresponds ______ inverse element

Choose an answer

Two

One

No

Three

Choose an answer

Let a₁, a₂, a₃, a₄and a₅be such that a₁, a₂, and a₃are in A.P., a₂, a₃and a₄are in G.P and a₃, a₄and a₅are in H.P. Then, a₁, a₃and a₅are in

Choose an answer

G.P.

A.P.

H.P.

None of these

If the roots of 3x2+kx + 12 = 0 are equal then k = ______

Choose an answer

Ifᵨ> 1 , then the conic, is:

Choose an answer

Ellipse

Parabola

Hyperbola

None of these

x²+ x - 5 = 0 is

Choose an answer

A polynomial

An inequality

An identity

None

Choose an answer

Range of cosecθis

Choose an answer

W - {y | -1 < y < 1}

R - {y | -1 < y < 1}

O - {y | -1 < y < 1}

R

(A∪B)∪C= --------------------------

Choose an answer

A∩B(B∪C)

A∪(B∪C)

A∪(B∩C)

None of these

The point lying on the terminal rat of -270° is

Choose an answer

(1,0)

(0,-1)

(0,1)

(-1,0)

If distance of (a,b) from x-axis is 2 then

Choose an answer

a = 2

b = 2

a = b

b = 4

Choose an answer

are real no

both are not real

are imaginary no

both are imaginary

I f a =5i + 2j, then|a| =

Choose an answer

√13

√7

1/√13

√29

If a,β are the roots of the equation x2 + kx +12 = 0 such that a - β = 1, the value of k is

Choose an answer

0

±1

±5

±7

Domain of cosh x is

Choose an answer

R

R -{0}

[1,∞)

[0,∞)

The position vector of a point (x, y) in xy plane is

Choose an answer

none of these

Choose an answer

ab=-1

ab = 1

ab = 2

None

Choose an answer

The equation of line passing through intersection of line x = 0 and y = 0 and the point (2,2) is

Choose an answer

y = x

y = x - 1

y = x + 1

Choose an answer

-1

0

1

None of these

The velocity of a particle moving along a straight line is given by v = 3t + t². The acceleration of the particle after 4 seconds from the start is

Choose an answer

4

11

26

None

The coefficient of the second term of (a+b)⁴ is

Choose an answer

1

9

3

5

2.333....is a

Choose an answer

Irrational no

Complex no

Rational no

None of these

The value of x which is unchanged by the mapping in the function defined by f ; x⟶ x² + 5x -5 for x> 0 is

Choose an answer

1

5

-5

-1

A conditional "if p then q" is denoted by

Choose an answer

In set builder notation the set {0,1,2,........100} can be written as

Choose an answer

{x / xε B ∧ x ≤ 100}

{x / x ∈ W ∧ x < 101}

{x / x ∈ Z ∧ x < 101}

The set of first 100 whole numbers

Choose an answer

The straight line passing through the focus and perpendicular to the directrix of the conic is known as its

Choose an answer

Tangent

axis

Focal chord

major or manor axis

The area of sector with central angle of 1 radians in a circular region whose radius is 2 m is

Choose an answer

nCn-r is equal to

Choose an answer

n!

n-1Cr

nCr

None of these

s > t then

Choose an answer

(s - t)²> (t - s)²

(s - t)²< (t - s)²

(s - t)²= (t - s)²

None

The angle between the vectors 3i + j - k and 2i - j + k is

Choose an answer

30°

45°

60°

90°

If A = {x/x is a positive integer and 4≤x<23}, then A=

Choose an answer

{1,2,3,4,5,6,7}

{4,5,6...........22}

{1,2,3,.........23}

{1,2,3,4,5}

Choose an answer

π/ 2

π/ 3

π/ 4

π

Choose an answer

y + 1 = Ae^x

y + 1 = Axe^x

xe^x= C

y + xe^x= C

A polynomial P(x)has a factor (x-a)if P(a) =

Choose an answer

a

x

1

0

We solve the system of non-homogeneous linear equations by

Choose an answer

a and b

b and c

c and a

a,b and c

√-1 b=

Choose an answer

b

2

2b

None of these

The set (Z, +) forms a group

Choose an answer

Forms a group w.r.t. addition

Non commutative group w.r.t. multiplication

Forms a group w.r.t multiplication

Doesn't form a group

Choose an answer

1

-1

The difference of two consecutive terms of an A.P. is called ______

Choose an answer

General term

Common ratio

Common difference

None of these

Apollonius was a:

Choose an answer

Rocket

Muslims scientist

Greek mathematicians

Method of finding conics

If x⁴- 10x²- 2x + 4 is divided by x + 3, then the reminder is

Choose an answer

1

0

4

None of these

Choose an answer

A is proper subset of B

A is an improper subset of B

A is equivalent to B

B is subset of A

Choose an answer

cos 2x

2 cos 2x

2 sin2x

-2 cos2x

Choose an answer

1

2

-2

4/√49 is a

Choose an answer

Irrational Number

Prime Number

Rational number

Whole number

Choose an answer

A key ring is an example of

Choose an answer

Permutation

Circular permutation

Combination

None

Choose an answer

The distance of the point (-2 , -3) from y-axis is

Choose an answer

2

-2

3

-3

Choose an answer

The surface generated by lines, consists of two parts, called:

Choose an answer

vertex

apex

nappes

axis

Choose an answer

The order of the matrix A is 3 x 5 and that of B is 2 x 3.The order of the matrix BA is

Choose an answer

2 x 3

3 x 2

2 x 5

5 x 2

The line y =mx +1 is tangent to the parabola y2 =4x if

Choose an answer

m=1

m=2

m=3

m=4

If f(x) = x + 1 then f(z²-1) is

Choose an answer

z²

z²+ 2

z²- 2

none of these

The points (x, y) which satisfy a linear inequality in two variables x and y from its

Choose an answer

domain

range

solution

none of these

Choose an answer

sin (α+β) + sin (α-β)

Choose an answer

2 sinαcosβ

sin (2αβ)

sinαcosα

None of these

The value of n, when ⁿP₂= 20 is

Choose an answer

3

4

6

5

Choose an answer

If Z = (1,2), then Z^-1 =?

Choose an answer

(0.2, 0.4)

(-0.2 ,0.4)

(0.2,-0.4)

(-0.2,-0.4)

Choose an answer

A²- 5A + 7I = 1

2A²- 3A + 7I = 0

A²- 5A + I = 0

A²- 5A + 7I = 0

Choose an answer

0

90°

180°

360°

f(x) = 1 is

Choose an answer

identity function

constant function

linear function

quadratic function

The interval in which f(x)=x3-6x2+9x is increasing

Choose an answer

1<x<3

x<1 and x>3

X ≥1 and x ≤ 3

-∞ < x < ∞

Choose an answer

3/8

7/8

1/8

None

Choose an answer

1

0

3

-3

Which of the vectors have opposite direction?

Choose an answer

quadrant I

quadrant II

quadrant III

quadrant IV

Choose an answer

The fractions obtained from fractional distillation of petroleum are placed in increasing order of their boiling points. Which order is correct

Choose an answer

Natural gas, petroleum ether, gasoline kerosene

Petroleum ether, kerosene, natural gas, petroleum ether

Gasoline, kerosene, natural gas, petroleum ether

Kerosene, gasoline, petroleum ether, natural gas

A smuggler could not carry gold by chemically depositing iron on the gold surface since

Choose an answer

Gold is denser

Iron rusts

Gold has higher reduction potential then iron

Gold has lower reduction potential then iron

Which of the following sulphates is not soluble in water

Choose an answer

Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium sulphate

Composition of clay in cement is:

Choose an answer

25%

50%

75%

80%

The reaction rate is expressed in the units of

Choose an answer

mol dm^-3S^-

mol dm^-3

mol dm^-3N^-

dm^-3S^-

Antibonding MO is formed by

Choose an answer

Addition of atomic orbitals

Substraction of atomic orbitals

Multiplication of atomic orbitals

None of these

Pressure volume work is

Choose an answer

The depression of freezing point is directly proportional to

Choose an answer

Mole fraction of the solution

Molarity of the solution

Molality of the solution

Molarity of the solvent

The electrolytic cell used for the production of metallic sodium is known as

Choose an answer

Down's cell

Solvary's cell

Haber's cell

None of these

Rutherford's model of atom failed because:

Choose an answer

The atom did o have a nucleus and electrons

It did not account fro the attraction b/w protons and neutrons

It did no account for the stability of the atom.

There is actually no space b/w the nucleus ad the electrons.

Anode is the surface on which probability of finding electron is:

Choose an answer

50%

Less than 10%.

More than 95%.

Zero.

Sulphur dioxide affects

Choose an answer

Cell wall

Plasmodesmata

All membrane systems

Nucleus

Sodium can be obtained by :

Choose an answer

Electrolysis of acidified water.

By heating NaCl and water at 100°

Electrolysis of molten sodium chloride.

Electrolysis of aqueous sodium chloride.

The net heat change in chemical reaction is same whether it is brought in two or more different ways in one or several steps. it is known as

Choose an answer

Henry's law

Joule's principle

Hess's law

Law of conservation of energy

The ph of 10-3 mole dm-3 of an aqueous solution of H₂SO₄ is :

Choose an answer

3.0

2.7

2.0

1.5

Amino acids are buildng blocks of:

Choose an answer

protein

Carbohydrates

Lipids

fats

The substances which soften the polymer are called

Choose an answer

Stabilizers

Plasticizers

Retarders

Pigments

The value of R (Rydberg's constant) is _______ m-1

Choose an answer

1.0974 x 107

1.0842 x 107

1.082 x 10-7

Both a and b

The formation of PVC from vinyl chloride is an example of

Choose an answer

Substitution reaction

Addition polymerization

Condensation polymerization

Condensation reaction

Lead accumulator contains

Choose an answer

30% NaCI solution as electrolyte

30% HCI solution as electrolyte

30% H₂SO₄solution as electrolyte

30% NaOH solution as electrolyte

______ are called biocatalysts

Choose an answer

Organic acids

Organic bases

Enzymes

All

Rutherford's experiment led to the discovery of

Choose an answer

Nucleus

Electron

Proton

alpha particle

The reaction of alcohol with SOCI₂in the presence of pyridine as catalyst gives

Choose an answer

Acids

Acid chloride

Alkyl halide

Benzene

Choose an answer

Proton donar

Dehydrating agent

Catalyst

Electrophile

Esters have peculiar smell, which of the following is used as an essence of orange

Choose an answer

Isoamyl acetate

Iosamyl valerate

Octyl acetate

Methyl butyrate

H₂+ L₂----2Hl

In the above equilibrium system, if the concentration of reactants at 25°C is increased, the value K_C will :

Choose an answer

Remains Constant

Increases

Cecreases

Depends upon nature of reactans

A one thousand dm³sample of water contains one gram of iron (iii) ions what is the concentration in parts per million of Fe^3f(eq) in parts per million

Choose an answer

0.001

0.01

0.1

1.0

Corrosion is basically a

Choose an answer

Altered reaction in presence of H₂O

Electrochemical phenomenon

Interaction

Union between two light metals and a heavy metal

Law of mass action states that rate of chemical reaction is directly proportional to the product of active masses of the reactants. The term active mass means

Choose an answer

Mass in grams converted to products

Number of moles

Number of moles per dm³of reactants

Total pressures of the reactants

Substituted phenyl groups are called

Choose an answer

acyl groups

phenyl groups

Aryl groups

Alkyle groups

1 mol of N₂O₄ was decomposed according to given equation in 1dm₃ container. At equilibrium x mole of N₂O₄ have dissociated. What is the value of K_C:

Choose an answer

2x/(1-x)²

4x²/(1-x)

4x/(1-x)

2x/(1-x)

The filtration process is used to separate solid from

Choose an answer

Liquid

Gas

Solid

All of above

The number of unpaired electrons in the p-subshell of oxygen atom

Choose an answer

1

2

3

4

The digestion of fats in the intestines is aided by

Choose an answer

Diffusion

Protection

Peptization

Emulsification

Which of the following substances is used as an antiknock compound?

Choose an answer

Tetraethyl lead

Lead tetrachloride

Lead acetate

Ethyle acetate

Linear geometry is present in:

Choose an answer

Sp³

Sp²

Sp

D²sp³

Which of these polymers is an addition polymer?

Choose an answer

Nylon-6,6

Polystrene

Terylene

Epoxy resin

The electronegativity of elements in a period from left to right

Choose an answer

Decreases

Increases

First decreases then increases

First increases then decreases

Ethyl alcohol prepared during fermentation is pure:

Choose an answer

20%

10%

11%

12%

Propanone is the product obtained by dehydrogenation of

Choose an answer

2-Propanol

1-Propanol

Isobutyl alcohol

Propanethoil

Choose an answer

Step 1 Step 2

HCI HCN

HcN,NaCH H₂SO₄

H₂SO₄ K₂Cr₂O₇/H₂SO₄

KCN HCI

The decrease in radius in large for:

Choose an answer

Monovalent ions.

Trivalent ions.

Divalent ions.

Atoms.

Which of the following elements is not present in all proteins?

Choose an answer

Carbon

Hydrogen

Nitrogen

Sulphur

Acetylene gives

Choose an answer

White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu(NO3)2

White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu2C12

White ppt. with both

Red ppt. with both

Ammonium carbonate when heated to 200°C gives a mixture of NH₃and CO₂vapour with a density of 13.0. What is the degree of dissociation of ammonia carbonate?

Choose an answer

3/2

1/2

2

1

Which of the following is not a property of cathode rays

Choose an answer

They can produce x-rays when they strike a heavy metal anode

They can cause reduction reaction

They produce fluorescence in rare earth and minerals

They comprise neutral particles

In the expression rate = K [A]^a[B]^bK is

Choose an answer

The order of reaction

The speed of reaction

The specific rate constant

The overall order of reaction

Choose an answer

Diastase

Lipase

Inverters

Zymase

Kinetic energy of the molecules is due to

Choose an answer

Transnational motion

Rotational motion

Vibrational motion

All of these

Which of the following compounds does not react with NaHSO₃?

Choose an answer

C₆H₅CHO

Acetophenone

Acetone

Acetaldehyde

The number of atoms present in molecule determines its:

Choose an answer

Molecularity

Atomicity

Basicity

Acidity

Terylen fibre is made by reaction of terephthalic acid with

Choose an answer

Ethylene

Ethylene glycol

Glycol

Terylene

White P when boiled with strong solution of caustic soda produces

Choose an answer

Phosphine

Posh acid

Phosphorous acid

None

Pb has inert pair of electrons:

Choose an answer

One

Two

Three

Four

Compounds containing cyanide group (.........C=H) are called:

Choose an answer

Nitrides

Nitrites

Nitriles

Cyanides

If two lone pairs are present then bond angle of tetrahedral compound reduces to ______ degrees

Choose an answer

109.5°

107.5°

104.5°

None

The chemical formula of Epson salt is

Choose an answer

MgSO₄

MgCl₂

MgSO₄. 7H₂O

MgCl₂. 7H₂O

Kolb's method of alkanes production, is actually

Choose an answer

Hydrolysis

Catalysis

Electrolysis

Hydrogenation

An element in +3 oxidation state has the electronic configuration (Ar) 3d³. Its atomic number is

Choose an answer

24

23

22

21

Which reaction yields Bakelite?

Choose an answer

Urea with HCHO

Tetramethyl glycol with Hezamethylene diisocyanate

Phenol and HCHO

Ethylene glycol and Dimethylterephthalate

The formula of calcium superphosphate is

Choose an answer

CaHPO₄

CaH₂PO₄

Ca(H₂PO₄)₂

None of these

The catalyst,. which is used as specialist for cracking, are

Choose an answer

Aluminates

Alumlnosilicates

Aluminium slats

All can be used

Which one is used as a fuel for internal combustion engines in many European countries and Brazil

Choose an answer

C₂H₅OH

CH₃OH

CH₃COOH

C₂H₂

Primary carbon attaches with other hydrogen atoms directly:

Choose an answer

One

Two

Three

At least one or more than it

An organic compound 'A' has the molecular formula C₃H₆O, it undergoes iodoform test. When saturated with HCl it gives 'B' of molecular formula C₉H₁₄O. A and B, respectively are

Choose an answer

Propanal and mesitylene

Propanone and mesityl oxide

Propanone and 2, 6-dimethyl-2,5-heptadien-4-one

Propanone and mesitylene oxide

Charge to mass ratio of electron was discovered by:

Choose an answer

Millika.

Rutherford.

J.J. Thomson.

Chadwick.

Which one of the following statements is true about discovery of neutrons?

Choose an answer

These particles were formed by the bombardment of Alpha-particles on Beryllium.

These particles are formed by the spiting of alpha-particles.

These particles were discovered by natural radioactivity.

None of above.

The number of moles of NH₄CI dissolved in 500 cm³of its 15%, W/N solution is

Choose an answer

1 mole

1.4 mole

2.0 mole

2.4 mole

The amount of electricity that can deposit 108 g of silver from silver nitrate solution is

Choose an answer

1 ampere

1 coulomb

1 faraday

2 ampere

pKb value of NH₄OH is 4.74. If the concentration of NH₄OH is 1 molar containing 0.1 molar NH₄Cl, then pH of this buffer will be

Choose an answer

3.74

10.26

4.74

9.26

Phosphorus pentoxide finds use as

Choose an answer

An oxidizing agent

A reducing agent

A bleaching agent

A dehydrating agent

Which is not a component of environment

Choose an answer

Biosphere

Lithospahre

Hydrosphere

None of these

The third line of the Balmer series, in the emission spectrum of the hydrogen atom,is due to the transition from the

Choose an answer

Fourth Bohr orbit to the first Bohr orbit

Fifth Bohr orbit to the second Bohr orbit

Sixth Bohr orbit to the third Bohr orbit

Seventh Bohr orbit to the third Bohr orbit

Which of the following is not aromatic hydrogencarbon

Choose an answer

Benzene

Naphthalene

Toluene

Cyclohexene

The fibre which contains polymers of vinylidine chloride as fibre forming substance is known as

Choose an answer

Saran fibre

Nylon

Polyester

Acetate fibre

Which of the following pairs are chemically dissimilar?

Choose an answer

Na and K

Ba and Sr

Zr and Hf

Ca and Zn

Which compound has the maximum repulsion with water?

Choose an answer

C₆H₆

C₂H₅OH

CH₃CH₂CH₂OH

CH₃----O---CH₃

In lead accumulator the electrolyte is H₂SO₄solution is

Choose an answer

30% H₂SO₄

60% H₂SO₄

80% H₂SO₄

90% H₂SO₄

In thermal decomposition of N₂O the half life period for two different initial concentrations of N₂O are

(i) 255 second for initial N₂O 290 mm Hg

(ii) 212 second for initial N₂O 360 mm Hg then it is

Choose an answer

Zero order

First order

Second order

Third order

Alkyl halides are considered to be very reactive compounds towards nucleophiles because

Choose an answer

They have an electrophilic carbon

They have an electrophilic carbon and a good leaving group

They have an electrophilic carbon and a bad leaving group

They have a nucleophilic carbon and a good leaving group

The fourth period contains elements

Choose an answer

8

16

18

32

1.0 g pure calcium carbonate was found to require 50 ml of dilute HCl for complete reaction. The strength of HCl solution is given by

Choose an answer

4 N

2 N

0.4 N

0.2 N

The quantum number which describe the orientation of the orbitals is

Choose an answer

Spin quantum number

Principle quantum number

Azimathal quantum number

Magnetic quantum number

Types of cracking are:

Choose an answer

Thermal

Catalytic

Steam

All a, b ,c

Choose an answer

4-methyl pentene

2-methyle-1-butene

2-methyl propane

None of the above

Pick out the wrong statement. In electrochemical cell

Choose an answer

Electrons are released at anode

Cathode is regarded as negative electrode

Chemical energy is converted into electrical energy

Salt bridge maintains the electrical neutrality of the solution

Which of the following is not a fertilizer

Choose an answer

Nitrophos

Dolomite

Super phosphate of lime

Urea

N-atom forms three covalent bonds, its electronic configuration is

Choose an answer

Any substance under going physical or chemical change is said to be

Choose an answer

Surrounding

System

Losphere

Lithosphere

Solvent extraction is an unstable,Process and it is controlled by:

Choose an answer

Alcohol extraction

Petrol extraction

Phenol extraction

Ether extraction

The bond angle between hydrogen atoms and carbon in alkane is

Choose an answer

104.5°

107.5°

109.5°

120.5°

Benzene is prepared from n-hexane in the presence of catalyst

Choose an answer

Cr₂O₃

Al₂O₃

SiO₂

All above

Which one of the following gases is used for artificial ripening of fruits

Choose an answer

Ethene

Ethane

Methane

Propane

Aledehydes ketones can be prepared form alcohols by their:

Choose an answer

Reduction

Oxidation

Decomposition

Synthesis

By applying Hess's law, we can calculate

Choose an answer

ΔH

ΔS

ΔF

K

Which of the following statements about acetic, anhydride is not correct

Choose an answer

It is immiscible with water but is hydrolysed to give acetic acid

It is prepared by the action of actyl chloride on the sodium salt of acetic acid

it reacts with ammonia to give acetamide

it is a strong acid

The solutions of NaCl and KCl are prepared separately by dissolving same amount of solute in water, which of the following statements is true fro these solutions ?

Choose an answer

KCl solution will have higher boiling point than NaCl solution.

Both the solutions have same boiling points.

KCl and NaCl solutions possess same vapour pressure.

KCl solution possesses lower freezing point than NaCl solution.

Which statement is true about a free radical

Choose an answer

An atom with a positive charge

An atom with a negative charge

An atom with a lone pair of electrons

An atom with unpaired electron

Simple sugars are :

Choose an answer

Monosacchrides

Disaccharides

Oligo saccharides

Trisaccharides

Which one of the following equations represent the reaction that occurs when calcium nitrate is heated strongly

Choose an answer

Most hazardous metal pollutant of automobile exhaust is

Choose an answer

Mercury

Lead

Cadmium

Copper

During the steady flow, different streamlines

Choose an answer

cannot across each other

can across each other

either of them

neither of them

The shortest distance between two points directed from its initial point to final point is called:

Choose an answer

Velocity

Displacement

Speed

Distance

A field is uniform and much stronger:

Choose an answer

Inside a long solenoid

Outside a long solenoid

At the end of a long solenoid

At the central point of long solenoid

None of these

An aircraft is moving with a velocity of 300 ms^-1. If all the forces acting on it are balanced, then

Choose an answer

It still moves with the same velocity

It will be just floating at the same point in space

It will be fall down instantaneously

It will lose its velocity gradually

In gases, the charge carries are:

Choose an answer

Electrons

Positive ions

Negative ions

Both (A) and (C)

Both (A) and (B)

A body walks to his school at a distance of 6 km with a speed of 2.5 km/h and walks back with a constant speed of 5 km/h. His average speed for round trip expressed in km/h is

Choose an answer

24/13

10/3

3

4,8

The transition from solid state to liquid state is:

Choose an answer

Abrupt

Slow

Continous

Discontinous

Both (A) and (D)

The path followed by the projectile is known as:

Choose an answer

Cycle

Hyperbola

Trajectory

Route

1 amu is equal to

Choose an answer

1.66 x 10^-24kg

1.66 x 10^-19kg

1.66 x 10^-34kg

1.66 x 10^-27kg

The r.m.s. value of alternating current is equal to its maximum value at angle of

Choose an answer

60°

45°

30°

90°

When the pn-junction is forward biased. the current flows through it is of the order of

Choose an answer

mili-amperes

amperes

nano-amperes

micro-amperes

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

Choose an answer

Adhesive force

Nuclear forces

Inter atomic cohesive force

Electromagnetic force

None of these

Real gases strictly obey gas law at:

Choose an answer

High pressure and low temperatures

Low pressures and high temperatures

High pressures and high temperatures

None of these

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

Choose an answer

60 W bulb

100 W bulb

Both equally

None of these

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

Choose an answer

Push against the air

React against the rocket and push it up

Heat up the air which lifts the rocket

Push against the earth

SHM is type of ______ motion

Choose an answer

Vibratory

Linear

Circular

None

Gaussian surface is always:

Choose an answer

Rectangular

Spherical

Cylindrical

Box shape

Any of these

The number of countries who manage the largest satellite system is:

Choose an answer

3

24

126

200

The mechanics, which deals with the objects moving with velocities approaching that of light is called:

Choose an answer

Relativistic mechanics

Wave mechanic

Quantum mechanics

Statics

A person starts his journey from a point 0, travels 4 Km SW, then 4 Km NW, and finally 4 Km north-east. At what distance is he now from point 0?

Choose an answer

0 Km

4 Km

8 Km

12 Km

Which of the following options states the names of fluids in the order of increasing viscosity?

Choose an answer

mercury, motor oil, methanol

methanol, mercury, motor oil

motor oil, mercury, methanol

methanol, motor oil, mercury

Compton studied the scattering of x-rays by loosely bound electrons from:

Choose an answer

NaCl crystal

Graphite crystal

Zirconia

Copper crystal

None of these

The rate of change of momentum of a molecule is equal to:

Choose an answer

Pressure

Work

Density

Force

The SI unit of electric flux is

Choose an answer

Weber

Nm²C^-1

NmC^-1

Nm^-2C

The relation between charge 'Q' and current 'I' is given by

Choose an answer

Q = I/t

Q = It

Q = I²t

Q = I²/t

A bar 1.0 m in length and located along x-axix moves with a speed of 0.75 c with respect to a stationary observer. The length of the bar as measured by the stationary observer is

Choose an answer

1.66 m

1.0 m

0.66 m

2.66 m

The direction of velocity is along the direction of

Choose an answer

distance

displacement

acceleration

all of them

At any point on the right bisector of the line joining two equal and opposite charges

Choose an answer

At electric field is zero

The electric potential is zero

The electric potential decreases with increasing distance from the centre

The electric field is perpendicular to the line joining the charges

Two water pipes of diameters 4 cm and 8 cm are connected with a supply line. The velocity of flow of water in the pipe 4 cm diameter is

Choose an answer

1/4 times

4 times

Twice

1/2 of 8 cm diameter pipe

Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

Choose an answer

Interference

Diffraction

Polarization

Refraction

The word amorphous means:

Choose an answer

Without any structure

With definite structure

Regular arrangement of molecules

Both (B) and (C)

None of these

If m means mass of gases objected per second from a rocket and v shows the change in velocity, than mv is named as:

Choose an answer

Force

Energy

work

impulse

Most of the geysers occur in:

Choose an answer

Volcanic regions

Magnetic regions

Northern region

None of these

The critical temperature of tin is

Choose an answer

1.18 K

4.2 K

3.72 K

7.2 K

If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:

Choose an answer

5 cm

10 cm

20 cm

25 cm

Which of the following is not a unit of power:

Choose an answer

J-sec

Watt

N m/sec

Horsepower

Which quantity has different dimension:

Choose an answer

Work

Pressure

Energy

Torque

The direction of the acceleration is the same as that of

Choose an answer

speed

velocity

both of them

none of them

According to the second law, which is must to produce work

Choose an answer

a source contains a large amount of heat energy

two sources at the same temperature

two sources at the different temperatures

a source contains a small amount of energy

The current in LCR circuit will be maximum whenωis

Choose an answer

As large as possible

Equal to natural frequency of LCR system

The amplifier which us used to perform mathematical operations electronically is known as

Choose an answer

calculator

OP-AMP

computer

any one of them

A body is dropped from a tower with zero velocity, reaches ground in 4s. The height of the tower is about

Choose an answer

80 m

20 m

160 m

40 m

The restoring force always directed towards the

Choose an answer

extreme position

mean position

both of them

none of them

Which of the following can become a good temporarily magnet

Choose an answer

iron

steel

both of them

none of them

In SHM, there is always a constant ratio between displacement if body and its:

Choose an answer

Velocity

Period

Mass

Acceleration

In the equation E=mc²value of c is:

Choose an answer

1,86,000 miles per hour

1,86,000 miles per sec

3 X 10⁸m/sec

Both A and C

Both B and C

Semi-conductor elements have atoms with

Choose an answer

2 valence electrons

3 valence electrons

4 valence electrons

5 valence electrons

An object undergoes S.H.M has maximum speed when its displacement from the mean position is

Choose an answer

maximum

zero

half of the maximum value

one third of the maximum value

The speed of a pendulum is measured to be 3.0 s in the inertial reference frame of the pendulum. What is its period measured by an observer moving at a speed of 0.95 c with respect to the pendulum

Choose an answer

2.9 s

3.0 s

6.6 s

9.6 s

A high temperature, the proportion of shorter wavelengths radiation, emitted by the body

Choose an answer

decreases

first increases then decreases

increases

any one of them

The SI unit of stress is

Choose an answer

N/m²

Nmc

dynes/m

N

The mass of fluid passing through any cross-section per unit time is called

Choose an answer

electric flux

magnetic flux

mass flux

none of them

The information from far side of the universe are gathered by:

Choose an answer

Radio telescope

Microscope

Telescope

Spectro scope

An ordinary glass gradually softens into a 'paste -like' state before it becomes a very viscous liquid. It happens almost at:

Choose an answer

800^oC

500^oC

300^oC

100^oC

None of these

The induced current in the loop can be increased by:

Choose an answer

Using a stronger magnetic field

Moving the loop faster

Replacing the loop by a coil of many turns

All above

Both (A) and (B)

A physical system under going forced vibrations is known as

Choose an answer

Simple harmonic oscillator

Compound harmonic oscillator

Physical harmonic oscillator

driven harmonic oscillator

In case of streamed lined flow of liquid, the loss of energy is

Choose an answer

Maximum

Minimum

Infinite

equal to what is in turbulent flow

The velocity of sound is greatest in

Choose an answer

Water

Air

Vacuum

Metal

Acceleration produced in a body by the force varies

Choose an answer

inversely as the applied force

directly as the applied force

directly as the mass of the body

none of them

The magnitude of the displacement is a line from initial position to final position which is

Choose an answer

straight

curved

either be curved or straight

none of them

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Choose an answer

2R

4R

16R

Zero

Work done is maximum when angle between force and displacement is:

Choose an answer

0°

90°

180°

None of these

The time required to complete on vibration is called

Choose an answer

frequency

total time

time period

velocity

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Choose an answer

N = nN_Am = MN_A

n = N N_A, M = mN_A

M = N_A/N , N_A= m/n

N = nN_A, M = mN_A

Viscosity is defined as

Choose an answer

the friction between fluid and its container's walls

the internal friction between two layers of fluid

the resistance to flow a fluid experiences

the extent to which outside factors effect the fluid's flow

Monochromatic light means waves of:

Choose an answer

Same frequency

Same colour

Same wavelength

All of them

The modulus of elasticity can be written as

Choose an answer

stress x strain

strain/stress

1/2 x stress x strain

stress/strain

Scalar product is also called:

Choose an answer

Cross product

Dot product

Product scalar

Product vector

Graph of Black body radiation is example of

Choose an answer

Band spectra

Continuo's spectra

Line spectra

All

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Choose an answer

heat capacity

specific heat capacity

molar specific heat

molar specific heat at constant volume

A non-inertial frame of reference is that frame of reference in which

Choose an answer

a = 0

a > 0 or a < 0

v = 0

none of them

The capacity of a parallel plat capacitor depends on the

Choose an answer

Type to metal used

Thickness of plates

Potential applied across the plates

Separation between the plates

There is present in paraffin a large amount of:

Choose an answer

Nitrogen

Hydrogen

Carbon

Baryllium

Lithium

A ball is dropped vertically down and it takes time t to reach the ground. At time t/2

Choose an answer

The ball had covered exactly half the distance

The velocity of the ball was V/3 where V is the velocity when it reached the ground

The ball had covered less than half the distance

The ball had covered more than half the distance

A process in which no heat enters or leaves the system is called

Choose an answer

isochoric process

isothermal process

adiabatic process

none of them

Recently a complex crystalline structure known as Yetrium Barium Copper Oxide have been reported to become superconductor at

Choose an answer

125 K

25 K

263 K

163 K

A disc rolls down a hill and its speed at bottom is found to be 11.4 m/sec. Height of the hill is then nearly:

Choose an answer

10 m

12 m

13 m

15 m

When a body moves with a constant speed in a circle:

Choose an answer

No work is done on it

No acceleration is produced in the body

Velocity remains constant

None of these

The reciprocal of decay constant λ of a radioactive material is:

Choose an answer

Frequency

Half life

Year

Mean life

None of these

Pressure exerted by a gas on the walls of its container in due to

Choose an answer

adhesion between the gas molecules and the container

cohesion between the gas molecules and the container

collision between the gas molecules and the container

surface tension of the gas

One radian is equal to:

Choose an answer

30.3°

45.3°

50.3°

57.3°

Which of the following waves are more energetic

Choose an answer

radio waves

infrared waves

ultraviolet

γ-rays

Specific heat at constant pressure is greater than the specific heat at constant volume because

Choose an answer

Heat is used up to increase temperature at constant pressure

Heat is used by gas for expansions purposes at constant pressure

Heat is use dup to increase internal energy

The above statement is invalid

Work done is maximum when angle between force and displacement is:

Choose an answer

0°

90°

180°

None of these

A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?

Choose an answer

3 x 10²⁰

3 x 10¹⁰

6 x 10²⁰

6 x 10¹⁰

Which of the following quantity for particle executing SHM is non-zero at mean position

Choose an answer

Force

Acceleration

Velocity

Displacement

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec^-2comes out to:

Choose an answer

980 N

580 N

1380 N

Zero

The property of light which does not change with the nature of the medium is:

Choose an answer

Frequency

Amplitude

Wavelength

None of these

Astrophysics is a branch of physics, which deals with

Choose an answer

Sub-atomic

Stars and galaxies

Light and sound

Music

Pressure of a gas at constant volume is proportion to

Choose an answer

Total energy of gas

Average P.E to molecules

Average K.E of molecules

Total internal energy of gas

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Choose an answer

The charge in the plates reduces and potential difference increase

Potential difference between the plates increase, stored energy decreases and charge remains the same

Potential difference between the plates decreases and charge remains unchanged

None of the above

In above figures, tell which set of graphs shows that a body is moving with uniform velocity:

Choose an answer

(i) and (ii)

(ii) and (iii)

(iii) and (iv)

When a falling body hits ground, its KE changes to _____ energy.

Choose an answer

Potential

Chemical

Mechanical

sound and heat

Mass of proton is of order of

Choose an answer

10^-31gm

10^-27kg

10^-24gm

10⁺²⁷kg

The torque per unit twist of coil is called

Choose an answer

proportionality constant

gravitational constant

boltzman constant

coupling constant

Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as

Choose an answer

waves

beat

interference

resonance

Referring to above figure, current in the coil P grows from zero to its maximum value

Choose an answer

At the instant the switch is closed

At the instant the switch is opened

When switch is kept open

All of above

Neither of above

If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers

Choose an answer

larger

shorter

equal

none of these

Electron volt is the unit of

Choose an answer

Potential difference

Energy

Resistance

Capacitance

The unit of spring constant is:

Choose an answer

J-sec

Metre

Nm^-1

None of these

The ideal gas law is

Choose an answer

P = nRT

V = nRT

PV =RT

PV =nRT