Question # 1

2x + 3y > 4 is a linear inequality in

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one variable

two variables

three variables

none of these

If A is a skew-symmetric matrix of order n and P, any square matrix of order n.prove that P' AP is

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Skew-symmetric

Symmetric

Null

Diagonal

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If A is a skew-symmetric matrix of order n and P, any square matrix of order n, prove that P' AP is

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Skew-symmetric

Symmetric

Null

Diagonal

The period of 3 sin x is

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2π

9π

3π

5π

The number of arbitrary constants in the general solution of a differential equation is equal to the different equation

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Order

Degree

Variables

All are correct

A function F(x) is called even if

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F(x) = F (-x)

F(x) = F(-x)

F(x) = -F(x)

2F(x) = 0

The are of the circle centred at ( 1 , 2) and passing through ( 4 , 6) is:

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10π

25π

5π

25/2π

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If A∩B=B, then n(A∩B) is equal to

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n(a)

n(a)+n(c)

n(c)

None of these

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If (2, 3) is the mid point of (a, 3) and (5, b) then

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a = 1 , b = -3

a = -1 , b = 3

a = 1 , b =3

a = -1 , b = -3

Two sets A and B are said to be disjoint if

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In order of A is m x n and order of B is n x p then order of AB is

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m x m

n x n

m x p

p x m

If five triangles are constructed having sides of the lengths indicated below, the triangle that will NOT be a right triangle is

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8, 15, 17

3, 4, 5

12, 15, 18

5, 12, 13

If x,y are two positive distinct numbers then

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A>G>H

A<G<H

A=G=H

None of these

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0

1

-2

10

θ and 2kπ+θ are the ________ angles

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Quadrantal angles

Coterminal

Allied

None

sin(a-90°)=______;

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sina

cosa

-sinθ

-cosa

A number A is said to be the A.M between the two numbers a and b if a, A, b are in

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A.M

A.P

G.P

G.M

If cos 20°=K and cos x=2 k²-1, then the possible values of x between 0° and 360° are

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140°

50° and 140°

50° and 130°

40° and 320°

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sec 3x + c

- cosec 3x + c

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3

1

2

4

If b²- 4ac is positive then the roots of the equation are

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Real

Imaginary

Positive

Negative

x = _________ is in the solution of 2x + 3 < 0

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0

2

-1

-2

The roots of px2 - (p-q)x-q=0 are

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equal

Irrational

Rational

Imaginary

Domain of secθis

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If f(x) = x²then f(0) is

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0

1

2

none of these

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The set of real roots of the equation log_{(5x + 4)}(2x +3)³- log_{(2x + 3)}(10x²+ 23x + 12) = 1 is

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{-1}

{-3/5}

Empty set

{-1/3}

If the points (a,2b):(c,a+b):(2c-a,h) lie on the same line then

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h=2a

h=a+b

h=ab

h=ac

∀a,b, c ε R ac = bc ⇒ a = b, c ≠ 0 is a

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Symmetric property

Cancellation property w.r.t multiplication

Reflexive property

Transitive property

If circumference of circle is divided into 360 congruent parts the angle subtended by one part at the centre of circle is

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1 degree

1 second

1 minute

1 radian

The conic is a parabola, when:

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ᵨ > 1

ᵨ < 1

ᵨ = 1

ᵨ = 0

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

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The set (Q, .)

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Forms a group

Does not form a group

Contains no additive identity

Contains no additive inverse

The set {1,-1,i,-i}

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Form a group w.r.t addition

Form a group w.r.t multiplication

Does not form a group w.r.t multiplication

Not closed under multiplication

Which is not included in the domain of cos^-1x

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0

1

-1

2

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3

2

8

0

Zero is

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An irrational number

A rational number

A negative integer

A positive number

(x + 2)²= x²+ 4x + 4 is

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A linear equation

A cubic equation

A quadratic equation

None

The period of|sin⁡2x| is

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π/2

-π/2

π

π/3

4/√49 is a

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Irrational Number

Prime Number

Rational number

Whole number

A coin is tossed. If head comes up, a die is thrown but if tail comes up, the coin is tossed again. The probability of obtaining a head and an even number is

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1/8

2/8

3/8

None of these

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Which one represents a sequence

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an

Sn

a(n)

{an}

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The centre fo the circle x²+ y²+ 12x -10 = 0 is

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(12, -10)

(6, -5)

(-12, 10)

(-6, 5)

an -an-1,∀n∈N∧n>1 in an A.P is called

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Common difference

nth term

Common ratio

None of these

A non-terminating, non-recurring decimal represent

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A natural number

A rational number

An irrational number

A prime number

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2, 3

3, 3

2, 6

2, 4

pth term of an H.P. is qr and qth term is pr then the rth term of the H.P. is

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pqr

1

pq

pqr²

If x² + px + 1 is a factor of ax³+ bx +c, then

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a²+ c²= -ab

a²- c²= -ab

a²- c²= ab

None of these

A line segment whose end points lie on a circle is called

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The secant of the circle

The arc of the circle

The chord of the circle

The circumference of the circle

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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

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2 x 3

3 x 2

2 x 5

5 x 2

The angle between lines xy =0 is

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45°

60°

90°

180°

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The minimum value of the quadratic function f(x) = 5 x 2-11,is

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7

-7

6

-11

If n is any positive integer then 4ⁿ>3ⁿ+ 4 is true for all

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tan 294° =______;

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tan 24°

-tan 24°

cot 24°

-cot 24°

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Find the geometric mean between 4 and 16

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For any set B,B∪B' is

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Is set B

Set B'

Universal set

The points (5, -4, 2),(4, -3, 1),(7, -6, 4),(8, -7, 5) are vertices of a

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Square

Parallelogram

Rectangle

Rhombus

The point ________ is in the solution of the inequality 2x - 3y < 4

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(0, -2)

(1, -3)

(2, 2)

(3, 0)

Five engineering, four mathematics, two chemistry books are placed on a table at random.The probability that the books of each kind are all together is

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∀a,b, c ε R,a +c = b + c = > a = b

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Reflexive property

Symmetric property

Cancellations property w.r.t. addition

Transitive property

If the matrices A and B have the order 1 x 10 and 10 x 1 then order of AB is

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1 x 1

1 x 10

10 x 10

10 x 1

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-2x³

2x^-3

-2x^-3

2x³

w⁷³= ______

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0

1

w

w²

For any set X, X∪X is

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X

X'

Φ

Universal Set

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0

1

undefined

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x³⁹

40x³⁹

40x⁴¹

none of these

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none of these

The angles of elevation of the top of a tower at the top and the foot of a pole of height 10 m are 30° and 60° respectively. The height of the tower is

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10 m

15 m

20 m

None of these

O (0,0)is called:

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Position vector

Free vector

Unite vector

Null vector

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Given two independent event A and B such that P(A) = 0.30 and P(B) = 0.60. Probability of getting neither A nor B is

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0.28

0.13

0.12

0.42

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cosec x + c

-cosec x + c

-sec x + c

sec x + c

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

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Real and equal

Real and distinct

Complex

None of these

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0

1

-1

None of these

The equation x2+ y2- 8x+ 6y+ 25= 0 represents

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A circle

A pair of straight lines

A point

None of these

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Linear equation

Quadratic equation

Cubic equation

None of these

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If the terminal rays of an angle falls on any axis then the angle is called

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Allied angle

Acute angle

Standard position

Quadrantal angle

If a polynomial p(x) is divided by x-c, then the remainder is

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p(x)

x-c

c

P(c)

Tan 360° = _______

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-1

0

1

Undefined

The three noncollinear points through which a circle passe are known, then we can find the:

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Variables x and y

Value of x and c

three constants f,g and c

inverse of the circle

A function from X to X is denoted as

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f : X to Y

f : Y to Y

A function in which the second elements of the order pairs are distinct is called

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Onto function

One-one function

Identity function

Inverse function

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Sum of all the four forth roots of unity is

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1

-1

i

0

cos h²x + sin h² x

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an even function

an odd function

an even and implicit function

neither even nor a odd

The distance of the point (a, b) from x-axis is

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a

b

a + b

sec h x = ________

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Which of the following is skew symmetric matrix

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

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0.5m2

2m2

1m2

4m2

Choose Relative Pair Of Word

ARCHIPELAGO : ISLAND

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Peninsula : Strait

Cluster : Stars

Border : Desert

Sun : Planet

Affectation

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pretense

reality

standing

adverse effect

Choose Relative Pair Of Word

RIB CAGE : LUNGS

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Skull : brain

Appendix : organ

Sock : foot

Skeleton : body

Hair : scalp

Choose correct word or phrase that is most similar to the word given

EXTOL

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To flatter

Acknowledge

Deprive of

Praise

Tax

(Complete the sentence with suitable words)

Fauzia presents herself as a journalist by asking people in power the kinds of ____ questions that order reporters do not ask

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Pointed

Circumnutating

Abnormal

Irrelevant

Orbitals having same energy are called

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Hybrid orbitals

Valence orbitals

Degenerate orbitals

D-orbitals

Electronegativity order of alkyl halides is:

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Rl > RBr > RCl > RF

Rbr > RCl > RF >Rl

RCl > RF >Rl > RBr

RF >Ri > RBr >RII

Aluminium oxide is:

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Acidic oxide

Basic oxide

Amphoteric oxided

None of these

The color of Cr³⁺ion is

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Violet

Blue

Pink

Green

Alcohol reacts with halogen acid to produce

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Alkyl halides

Aldelydes

Ketones

Alkanes

The saturated hydrocarbons usually end with suffix ______

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Ane

Ene

Yne

Oic

Which woody raw material is used for the manufacture of paper pupl

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Cotton

Bagasse

Poplar

Rice straw

A pollutant affects

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Human health

Quality of life

Functioning of ecosystem

All of these

AgCl is soluble is

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Aqua regia

H₂SO₄

HCl

NH₃

The negatively charged particles are called

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Cation

Radical

Anion

Positron

Elements in which f-orbitals are in the process of completion are called

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Outer transition element

Inner transition elements

Non-tranistion elements

Radioactive elements

In the reaction of oxalic acid with KMnO₄and H₂SO₄is slow at the beginning but after sometimes the reaction becomes faster due to

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Formation of MnSO₄which acts as 'Auto catalyst

Formation of CO₂which acts as 'Auto catalyst

Formation of K₂SO₄which acts as 'Auto catalyst

Evolution of O₂gas which acts as 'Auto catalyst

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1

2

3

4

Which is symmetric alkene?

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CH=C-CH₂

CH≡CH

CH₃-C≡C - CH₃

B and C

The digestion of fats in the intestines is aided by

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Diffusion

Protection

Peptization

Emulsification

Wolf-kishner reduction is used for the reduction of

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Nitro compounds

Carboxylic acids

Carbonyl compounds

Olefins

Dipole moment of CO molecule is:

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0.0

1.112 D

0.112 D

2.112 D

Drawback DDT as presticide is

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I becomes ineffective after some time

It is less effective than others

It is not easily/rapidly degraded in nature

Its high cost

The rate of reaction :

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Remain same as reaction proceeds.

May decrease or increase as reaction proceeds .

Increase as reaction proceeds.

Decreases as reaction proceeds.

The strongest acid among the following aromatic compound is

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Ortho-nitrophenol

Para-chlorophenol

Para-nitrophenol

Meta-nitrophenol

Which of the following equations represents the action of heat on NaHCO₃

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-778.9 KJ

788.0 KJ

-1.9 KJ

+1.9 KJ

Which of the following statement is not related to Solvay's process of Na₂CO₃

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Cheap materials

Pure product

Continuous process

Harmful by-products

Which of the following oxides is amopheric in character?

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CaO

CO₂

SiO₂

SnO₂

The amount of energy required to remove an electron from an atom of an element in the gaseous state is called

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Electron affinity

Electronegatively

Ionization energy

None of these

Two H-atom combine to form a strong H₂molecule due to

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Increase in potential energy

Decrease in potential energy

Energy remains unchanged

Distance is increased

All the elements belongs to the 2nd period are

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Normal elements

Transition elements

Stable elements

Halogens

The state of hybridization of carbon atom in methane is

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sp³

sp²

sp

dsp²

Self linkage of carbon to produce long chains

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isomerism

Polymorphism

Polymerization

Catenation

The chemical method used for determination of rate of reaction is

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Spectroscopic

Conductiometric

Refractometric

Titration

The charge of an electron is determined by

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J.J. Thomson

Crooks

Perrin

R.A.Millikan

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4 mole per dm³

2 mole per dm³

0.33 mole per dm³

0.67 mole per dm³

The tip of the funnel should touch the side of the beaker in order to avoid

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Splashing

Leakage

Mixing

Contamination

Interstitial compounds have

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Half formula

Fixed formula

Indefinite formula

None

The characteristic reactions of alkanes are

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Addition reactions

Substitution reactions

Condensation reactions

Polymerization reactions

The amount of heat evolved or absorbed in a chemical reaction indicated by balanced chemical equation at 25° and one atmospheric pressure is called

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Enthalpy of formation

Enthalpy of neutralization

Enthaply of combustion

Enthaply of reaction

The decrease in radius in large for:

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Monovalent ions.

Trivalent ions.

Divalent ions.

Atoms.

What is going to replace the petroleum?

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Silica

Silicates

Silicones

Silicon

Aledehydes ketones can be prepared form alcohols by their:

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Reduction

Oxidation

Decomposition

Synthesis

F₂, Cl₂, Br₂and l₂lie below SHE is the Electro chemical series that is why these

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Undergo reduction

Undergo oxidation

Liberate H₂gas with steam

None of these

Which of the statement is contrary to the first law of thermodynamics

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Energy can neither be created nor destroyed

One form of energy can be transferred into an equivalent amount of other kinds of energy

In an adiabatic process the work done is independent of its path

Continuous production of mechanical work without supplying an equivalent amount of heat is possible

Give IUPAC name fo Acetone

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Ethanal

Propanone

Butanone

Propanal

In which molecule carbon atom is sp²hybridized

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CH₄

C₂H₄

C₂H₂

None of the above

How many g of dibasic acid (mol. wt. 200) should be present in 100 ml of the aqueous solution to give 0.1 Normality?

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1 g

2 g

10 g

20 g

Protein may have

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Primary structure

Secondary structure

Tertiary structure

All of these

______ is called milk of magnesia

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NaOH

KOH

LiOH

None

A 4f orbital has

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one node

two node

three node

four nodes

Acetic acids react with PCI5 giving:

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Acetamide

Acetyl chloride

Alcohol

Ether

Isotopes of an element differ in

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Number of protons

Number of electrons

Number of neutrons

Number of electrons and protons

The term ebullioscopy is used for

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Depression of freezing point

Elevation in boiling point

Lower of vapour pressure

None of the above

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1

10

5

0.33

50 cm³of 0.05 molar nrea (N₂H₄CO) solution has % W/N concentration

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6%

3%

0.3 %

0.6 %

Which of the following salt is used as purgative

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CaSO₄

MgSO₄

BeSO₄

NaCl

The structure of ICI₂is

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Trigonal

Trigonal bipyramidal

Octahedral

Square planar

The coordination number of iron in [Fe(H₂O)₆]³⁺is

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2

3

4

6

The rate equation for a reaction is Rate =k[A]. what are unit of K ?

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Mole-1 dm³ S^-1

Mole dm³ S^-1

Moledm³

S^-1

Glacial Acetic acid is

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Pure acetic acid at 100°C

Acetic acid mixed with methanol

Pure acetic acid at 0°C

Pure acetic acid above 16.6°C

Hydrolysis of potassium acetate produces

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Acidic solution

Neutral solution

Basic solution

None of these

According to Mendleev, the physical and the chemical properties are the periodic function of their

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Atomic number

Atomic mass

Atomic wt

None

First atomic theory was put forward by an English school teacher:

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Maxewell

Newton

Sanger

John Dalton

Mg becomes isoelectronic with neon when it

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Loses two electrons

Gains two electrons

Loses 1 electron

Gains 1 electron

Which one of the following is not an example of chain growth polymer?

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Neoprene

Bunna-S

PMMA

Glyptal

The number of electron pairs shared in carbon tetrachloride molecule is

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2

3

4

1

The sum of mole fractions (X) of components of solution is equal to

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100

200

One

Zero

A fibre which is made from acrylonitrile as monomer

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PVC

Rayon fibre

Acrylic fibre

Polyester fibre

Hybridization in alkanes is:

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sp

sp²

sp³

dsp²

Choose an answer

There is no change in temperature

No change in volume

Heat is absorbed

Heat is released

Monosaccharides are

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Aldoses

Ketoses

Either a and b

None of these

Raney - nickel is the alloy of Ni with

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Pt

Al

Cu

Pd

When electron jumps from n₂= 2,3,4,5,.... orbit to n₁= 1 orbit in the hydrogen atom, the radiations emitted give the spectral lines

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Lyman series

Blamer series

Paschen series

Brackett series

Which of the following is a molecular diseases?

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Allergy

Cancer

German measles

Sickle cell anemia

Copper oxide is dedected by borax bead test with colour:

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Blue

Red

Yellow

Black

In 1903 Arthur Lapeworth became the first chemist to investigate a reaction mechanism. The reaction he investigated was that of hydrogen cyanide with propanone. What do we now call the mechanism of this reaction

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

Picric acid is

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2, 4, 6-Trinitrotoluene

2, 4, 6-Tribomoethanol

2, 4,6-Trinitrophenol

Para-Nitrophenol

Phosphate pollution is caused by

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Weathering of phosphate rocks only

Agricultural fertilizers

Phosphate rocks and sewage

Sewage and agricultural fertilizers

Molarity of pure water is :

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33.3

55.5

44.4

66.6

Aldehydes can be distinguished from ketones by

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2,4-DNPH test

NaHSO₃test

N₂H₄test

Tollen's test

Which is not a colligative property?

Choose an answer

Osmotic pressure

Lowering of vapour pressure

Depression of freezing point

Elevation of boiling point

17.1 grams sucrose (C₁₂H₂₂O₁₁) dissolved in 250 cm³of solution. This has molarity

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0.1 M

0.2 M

0.01 M

0.02 M

The empirical formula of benzene is determined by

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IR spectra

U.V

Elemental analysis

NMR spectra

Property of transition element is :

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Low m.p and b.p

Parramagnetism

Oxidation state

Low binding energies

Among the nitrogen containing fertilizer, the one with about 82% nitrogen content is

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Ammonium nitrate

Ammonia

Ammonium phosphate

Ammonium sulphate

Ethyl alcohol is industrially prepared from ethylene by

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permanganate oxidation

Catalytic reduction

Absorbing in H₂SO₄followed by hydrolysis

Fermentation

The percentage of carbon in different types of iron products is in the order of

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Cast iron > wrought iron > steel

Wrought iron > steel > cast iron

Cast iron > steel > wrought iron

Cast iron = steel > wrought iron

Chemical equilibrium involving reactants and products in more than one phase is called

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Static

Dynamic

Homogeneous

Heterogeneous

When electrons revolve in stationary orbits

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There is no change in energy level

They vecome stationary

They are gaining kinetic energy

There is increase in energy

Which of the following is not fatty acid?

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

Which is an essential constituent of chlorophyll

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Be

Fe

Mg

Ca

If Grignard reagent is allowed to react with another alkyl halide the main product is

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An alkane

Cyclo alkane

Alkyne

An alkene

Violet colour is obtained when dilute CuSO₄is added in alkaline solution of protein. This test is known as

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Biuret

Xanthoproteic test

Hopkins-cole

All of these

When acetylene is passed through a copper tube at 300°C, it polymerizes to

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Polyacetylene

polyethylene

Benzene

None of these

Which statement is true about a free radical

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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

The relative atomic mass of chlorine is 35.5. What is the mass of 2 mol of chlorine gas

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142 g

71 g

35.5 g

18.75 g

Functional group of ketones is:

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---CHO

---CO---

---C≡ N

---COOH

Among the elements given below, the one with highest electropositivity is

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Cu

Cs

Cr

Ba

Choose an answer

Increase in concentration of 1

Decrease in concentration of I₂

Increase in temperature

Increase in total pressure

Whenever a week base is dissolved in water, it give its conjugate acid. similarly a weak acid in water produces its conjugate base. This conjugate acid-base pair concept is stated by

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Law of mass action

Le-charlier's principle

Common ion effect

Lowery Bronsted concept

Rusting of iron is catalysed by

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Fe

O₂

Zn

H⁺

Nitrogen in the atmosphere is:

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78%

21%

0.9%

0.03%

In the ground state of an atom, the electron is present:

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In the nucleus.

In the second shell.

Nearest to the nucleus.

farthest from the nucleus.

Grignad reagent is reactive due to

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The presence of halogen atom

The presence of Mg atom

The polarity of C - Mg bond

None of above

As the light shines on the metal surface, the electrons are ejected

Choose an answer

slowly

instantaneously

either of these

none of these

Which force is not a conservative force:

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Frictional force

Gravitational force

Electric force

Elastic spring force

A photon is considered to have

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Momentum

Energy

Wavelength

All of the above

Neutron was discovered by

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Curie

Roentgen

Chadwick

Rutherford

The error may occur due to:

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Negligence

Faulty apparatus

Inappropriate method

all of these

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

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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

The voltage increases linearly with

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time

velocity

acceleration

torque

The angle of deflection of coil can be measured by the

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one method

three method

two method

none of these

Electron is a particle whose mass is:

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Greater than that of a proton

Smaller than that of a proton

Smaller than that of a proton or a neutron

Greater than that of an atom

The molecules or ions in a crystalline solids are

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static

not static

randomly moving

all of them

Bodies failing freely under gravity provide good example of motion under

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non-uniform acceleration

uniform acceleration

variable acceleration

increasing acceleration

The appearance of the colour in the soap (oil) film results from:

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Dispersion

Interference

Reflection

Refraction

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

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Diffraction

Interference

Polarization

Dispersion

Silicon can be obtained from

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Lead

Uranium

An isotope of oxygen

Sand

The number of isotopes of hydrogen are

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2

1

3

4

Graphs which are used to illustrate the variation of velocity of an object with time are called

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distance time graphs

speed time graphs

velocity time graphs

acceleration time graphs

In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:

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Greater than

Equal to

Smaller than

None of these

Branch of physics which deals with the study of stars and galaxies is called:

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Solid state physics

Astrophysics

Molecular physics

Chemical physics

Ferromagnetic substances lose their magnetism when heated above a certain temperature, known as

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critical temperature

curie temperature

high temperature

fixed temperature

At 'resonance' the transfer of energy from deriving source to the oscillator is

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maximum

minimum

zero

none of them

The value of the plank's constant 'h' is given by

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1.6 x 10^-19J

1.67 x 10^-27Kg

6.63 x 10³⁴Js

6.63 x 10^-34Js

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

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0.1 watt

1 watt

10 watt

100 watt

Linear momentum is a

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fixed quantity

constant quantity

scalar quantity

vector quantity

The charge per unit time through any cross-section of a conductor is called

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capacitance

electric power

current

potential difference

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

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outwards

inwards

in either way

none of these

The value of current at resonance in series LCR circuit is affected by the value

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R only

C only

L only

R, C and L

The vector is space has:

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One Component

Two Compnents

Three Components

Non of these

Astrophysics is a branch of physics, which deals with

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Sub-atomic

Stars and galaxies

Light and sound

Music

The mass of a body measured by a physical balance in a lift at rest is found to be m, if the lift is going up with an acceleration a, its mass will be measured as

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m (1 - a/g)

m (1 + a/g)

m

Zero

In a normally biased n-p-n transistor, an electron c current I_Eflows from the

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emitter into the base

collector into the base

base into collector

none of these

A long wire wound tightly on a cylindrical core is called:

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Potentiometer

Solenoid

Toroid

Wheat and stone bridge

None of these

One torr is equal to

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13.33 N/m²

760 N/m²

760 mm Hg

133.3 N/m²

Recent studies of ferromagnetism have shown that there exists in ferromagnetic substances small regions called

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tiny regions

domains

vectors

none of them

The disorder in the system increases due to the

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removal of heat

addition of heat

removal or addition of heat

none of them

The work done in moving a body between two points in a conservative field is independent of the

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Direction

Force applied

Path followed by the body

Power

In the study of thermodynamics, which gas is considered as the working substance

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real gas

ideal gas

any gas may be ideal or real

none of them

When a platinum wire is heated, it appears white at

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1600°C

900°C

1100°C

1300°C

Bodies which falls freely under gravity provides good example of motion under:

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Uniform acceleration

Non-uniform acceleration

Uniform velocity

None of these

Electromagnetic waves transport:

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Energy only

Momentum only

Both A and B are correct

None of is correct

Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator

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greater than the frequency of applied force

equal to the frequency of applied force

less than the frequency of applied force

all of them

Acceleration of the mass at any instant is given by

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a=k/m x

a= - m/k x

a = - k/m x

a=m/k x

There is a regular arrangement of molecules in a

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amorphous solids

polymeric solids

crystalline solids

none of them

An inertial frame of reference is that frame of reference in which

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a = 0

a > 0

a < 0

all of them

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

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3 x 10²⁰

3 x 10¹⁰

6 x 10²⁰

6 x 10¹⁰

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

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zero

small

large

very large

Substances which break just after the elastic limit is reached, are known as

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brittle substances

ductile substances

plastic substances

elastic substances

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

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64 W

80 W

100 W

125 W

In radio-active decay, the original element which disintegrate to another element is called

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element

daughter element

parent element

none of these

The effects of bends in a wire on its electrical resistance are:

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Zero

Much larger

Larger

Smaller

None of these

The study of physics involves?

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Structure of space and time

Interaction of electromagnetic radiation with matter

Both of them

Chemical changes

None of them

The nature of radiations emitted by a hot body depends upon its:

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Metarial

Temperature

colour

Volume

Length

Absolute motion cannot be detected

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in its own frame of references

in a different frame of references

both in its frame and different frame of references

none of these

Electric field lines emerge from the charges in

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One dimension

Two dimensions

Three dimensions

Four dimensions

None of these

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

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5μF

20μF

10μF

15μF

A rotating wheel accelerates up to the value of 0.75 rev/sec²after 2 seconds of its start. Its angular velocity becomes:

Choose an answer

9.42 rad/sec

2.6 rev/sec

1.5 rev/sec

Both A and C

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

Bernoulli's equation is based upon law of conversation

Choose an answer

Mass

Momentum

Energy

None of these

Centripetal acceleration is also called _______ acceleration:

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Tangential

Radial

Angular

None of them

Slope of velocity-time graph represents:

Choose an answer

Acceleration

Speed

Torque

Work

If the waves produced in a microwave oven are of wave-length 12 cm, then their frequency will be:

Choose an answer

2500 MHz

0.25 MHz

2500 KHz

None of these

In magnet-coil experiment, emf can be produced by

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Keeping the coil stationary and moving the magnet

Keeping the magnet stationary and moving

Relative motion of the loop and magnet

Any one of above

All above

In RLC series circuit, resonance occurs when

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X_{L > Xc}

X_{L < Xc}

X_{L = Xc}

None of these

From sand, we get a material used for construction of computer chips. That material is called:

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Germanium

Silicon

Copper

Lead

CT scanning is the abbreviated name of

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Computed Technology

Computed Technique

Computed Technology

Computerized Technique

Huygen's theory cannot explain

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Diffraction

Interference

Polarization

Photoelectric effect

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?

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0 Km

4 Km

8 Km

12 Km

Rice takes longest to cook

Choose an answer

In a submarine 100 m below the surface of the sea

At sea level

At Murree

At Mount Everest

A lift is moving up with acceleration equal to 1/5 of that due to gravity. The apparent weight of a 60 kg man standing in lift is

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60 kg wt

72 kg wt

48 kg wt

Zero

The force which opposes the applied force producing the displacement in the spring is called

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restoring force

periodic force

centripetal force

resistive force

The only significant motion possessed by the mono-atomic gas represented is:

Choose an answer

Translatory

Rotatory

Vibratory

None of these

The average value of current and voltage over a cycle is

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Positive

Negative

Zero

May be positive or negative

The restoring force is ______ and opposite tot he applied force within ______

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Equal, Elastic limit

Different, The walls of the laboratory

Different, Elastic limit

None of these

A tube is tapered from 20 cm diameter to 2 cm diameter, the velocity at the first cross-section is 50 cm/s, then the velocity at the second cross-section is

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50 m/s

20 m/s

40 cm/s

5 cm/s

The basic circuit element in a d.c. circuit is a/an

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Inductor

Resistor

Capacitor

Battery

The work performed on an object does not depend on:

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Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

What must be changing when a body is accelerating uniformly?

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the force acting on a body

the velocity of the body

the mass of the body

the speed of the body

The maximum drag force on a falling sphere is 9.8 N, it weight is

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1 N

9.8 N

4.9 N

Cannot be calculated

When a platinum wire is heated, it appears dull red at about

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500°C

900°C

1100°C

1300°C

Mechanical waves on the surface of a liquid are

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Transverse

Longitudinal

Torsional

both transverse and longitudinal

According to slok's law, drag force depends on

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Radius of the spherical body

Terminal velocity of body

Coefficient of viscosity

All of above

When a vector is multiplied by a negative number, its direction:

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Remains the same

Changes

Changes by 180°

None of these

Newton's first law is also called:

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Law of torque

Law of force

Law of inertia

None of these

Through which character we can distinguish the light waves from sound waves

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Interference

Refraction

Polarization

Reflection

When a constant potential difference is applied across the conductor, the drift velocity of electrons:

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Increases

Decreases

Remains the constant

Either of these

None of these

The drag force acting on a spherical droplet of radius 10^-5m moving with a velocity of 1 cm/sec in a fluid of velocity 5.31 x 10^-7m/sec. The units comes out to be:

Choose an answer

10^-16N

10^-14N

10^-12N

10^-10N

A car moves for half of its time at 80 km/h and rest half of time at 40 km/h, The total distance covered is 60 km. What is the average speed of the car?

Choose an answer

60 km/hr

80 km/hr

120 km/hr

180 km/hr

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

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Potential

Chemical

Mechanical

sound and heat

Phenomenon of radioactivity is due to disintegration of

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nucleus

neutron

proton

molecule

A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against friction is:

Choose an answer

+5 x 10¹J

+5 x 10²J

+5 x 10³J

+5 x 10⁴J

Physicist George Simon ohm was a

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German physical

French physicist

Chinese physicist

Russian physicist

When a mass 'm' is pulled slowly, the spring stretches by an amount x_o, then the work done will be

Choose an answer

W=Kx_o

W=1/2Kx_o

W=1/2Kx²_o

W=4Kx_o

The percentage of available heat energy converted into work by a petrol engine is roughly

Choose an answer

35 %

40 %

35 to 40 %

25 %

The distance covered by a body in unit time is called.

Choose an answer

Displacement

speed

Velocity

Both B and C

The power factor of resonant series circuit is

Choose an answer

1

0

-1

0.5

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Choose an answer

546 K

273 K

546°C

273°C

The smooth or steady stream-line flow is know as

Choose an answer

Laminar flow

Turbulent flow

Both a and b

None of the above

One joule is equal to

Choose an answer

1.6 x 10¹⁹eV

6.25 x 10¹⁸eV

1.6 x 18¹⁸eV

6.25 x 10¹⁹eV

Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons

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Frequency

Penetrating power

Energy

Method of creation

Tick the conservative force:

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tension in a string

Air resistance

Elastic spring force

Frictional force

Tick the series which lie/s in. the infra-red region.

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Pfund series

Brackett series

Paschen series

All of these

None of these

The flux through a closed surface depends upon:

Choose an answer

Shape of geometry of the closed surface

Charge enclosed

Nature of the medium

Both (A) and (B)

Both (B) and (C)