Question # 1

The number of subsets of a set having three elements is

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4

6

8

none of these

The 6th term of the sequence 7,9,12,16......is

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27

32

20

19

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real number

complex number

rational number

irrational number

{1, 2, 3, 4,.....} is set of ______

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Natural numbers

Whole numbers

Integers

Rational numbers

If sin 6θ+ sin 4θ+ sin 2θ, thenθ=

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The system of measurement in which the angle is measured in radians is called the

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circular system

CGS system

sexagesimal system

none of these

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2 x 2

2 x 3

3 x 2

3 x 3

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R/[0,4]

R/(0,4)

(0,4)

[0,4]

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π

π/6

-π/2

2π

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2^x

2^xIn x

2^xIn 2

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cos⁴θ- sin⁴θ=

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cos4θ

cos2θ

-sinθ

sin2θ

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additive property

multiplicative property

additive identity

multiplicative identity

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An open sentences formed by using the sign of equality '=' is called ______

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An identity

An equation

A polynomial

None of these

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Cos-1 (-x) =

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-x

1/x

tan-1 x

π-cos-1 x

The parabolay2=4ax open up if

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a<0

a≠0

a>0

All are incorrect

Express the perimeter P of square as a function of its area A?

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P = 4√A

P =√A

P = 2A

P =π√A

A∪(A∪B)= --------------------

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B

A

A∪B

None of these

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6x - 2 + c

x³- x²+ x + c

6x - x²+ c

6x³- x²+ c

Which symbolic notation represent unary operation ?

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-

∨

∧

⇔

The set of the first elements of the ordered pairs forming a relation is called its

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Function on B

Range

Domain

A into B

cos 2α=

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sin²α+ cos²α

-cosθ

tanθ

None of these

Four cards are drawn at random from a pack of 52 playing cards. The probability of getting all the four cars of the same suit is

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44/4165

22/4165

11/4165

None of these

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Associative law of addition

Commutative law of addition

Additive identity

Closure law of addition

If a_n= 2n -3, write the first four terms

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-3, -1, 1, 3

1, 3, 5, 7

-1, 1, 3, 5

None of these

Derivative of x³w.r.t x is

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0

1

3x²

x³

The vertex of the parabola (xsin a -ycos a)2 =4a(xcos a +ysin a) lies at

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(acos a,asin a)

(a,0)

(cos a,sin a)

(0,0)

The domain of y = cos-1 x is

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-∞ < x < ∞

-1≤ x≤ 1

x≤ -1 or x ≥ 1

None of these

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sec x tan x

-cosec x cot x

sec²x

-sin x

The set of rational numbers is subset of

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The set of natural numbers

The set of real numbers

The set of integers

The set of whole numbers

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The distance between the points A(3,1) and B(-2,-4) is

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5

25

10

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a₁+ a₂

a²₁+ a²₂

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Two real roots

Two positive roots

Two negative roots

One positive and one negative root

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(2x+a+b+c)

(a+b+c)

(a+b+c+x)

0

Vector additon is:

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Commutative

Associative

Commutative and Associative

None of these

The domain of the principle sine function is

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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

If 4 > b or a < b than a = b is a

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Additive property

Transitive property

Trichotomy property of inequality

None of above

cotθ= sin 2θifθ=

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Out of 10, 000 families with 4 children each, the number of families all of whose children are daughters is

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375

500

625

150

3x + 4 < 0 is

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not inequality

equation

identity

inequality

The square root of 2i - 20i is

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±(5 - 2i)

±(5+ 2i)

(5 - 2i)

None of these

The multiplicative inverse of -3i is

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3i

-3i

-1/3i

1/3 i

The set which has no proper subset is

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{0}

{}

{∅}

None of these

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The decimal fraction in which we have finite number of digits in its decimal part is called.

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recurring decimal fraction

Non terminating faction

Non recurring fraction

terminating decimal fraction

cosθ/2=

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0

Independent of a

Independent of b

Independent of c

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none of these

The transpose of a row matrix is a ______

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Zero matrix

Diagonal matrix

Column matrix

Row matrix

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0

2

4/3

5/3

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Φ set is the _______ of all sets

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Subset

Union

Universal

Intersection

ᵨ is a

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variable

Positive constant

Positive variable

Directrix

Domain of cosec x is ______

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Domain of y = scs x is

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All real numbers except π/2 + n*π

R

All negative integers

None of these

A diagonal matrix is always

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Identity

Triangular

Scalar

Non-singular

3x + 4 = 0 is

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not inequality

equation

identity

inequality

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Does not exist because f is unbounded

Is not attained even though f is bounded

Is equal to 1

Is equal to -1

A matrix with a single column is called

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Column matrix

Row matrix

Identity matrix

Null matrix

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Rational

Irrational

Non-real

Zero

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Improper rational fraction

Proper rational fraction

Polynomial

Equation

The middle term of (x-y)⁸is

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25 x⁴y⁴

70 x⁴y⁴

120 x⁴y⁴

97x⁴y⁴

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0

1

2

3

The range of y=x2 + 1 is the set of non-negative real numbers except

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0≤ y < 1

0 < y < 1

0≤ y≤ 1

0 < y≤1

A cone is generated by all lines through a fixed point and the circumference of

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a Circle

an ellipse

a Hyperbola

None of these

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2

-1

8

not defined

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3, -3, 11

3, 3, 11

-3, 3, -11

-3, -3, 11

The equation of the circle wit (-1, 1) and radius 2 is

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(2, 1) is in the solution of the inequality

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2x + y > 7

x - y > 2

3x + 5y < 6

2x + y < 6

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

Sand falls from a tube in such a way that it forms a cone whose height is always 4/3 times the radius of its base and radius of the base increases at the rate of 1/8 cm/sec. When this radius is 1 meter, the rate at which the amount of sand increases is

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2 x 2

2 x 3

3 x 2

3 x 3

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k3

0

3k

k6

The domain and range of a trigonometric function can be allocate by their

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graph

Continuity

Discontinuity

Periods

The third term of the sequence a_n= (-1)^n-1(n-7) is ______

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8

4

-4

8

Choose an answer

0.9

0.74

0.2016

None of these

The sum of an infinite geometric series exist if

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| r | < 1

| r | > 1

r = 1

r = -1

If a2 = b2 then

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a = b

a+b= 1

|a+b| =0

None

If a = {2m/2m < 9 ,m€ p} , the (n A) =

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{2,3,4,5,6,7,8}

{2,4,6,8............16}

{ 4, 6}

{2,3,5,7}

The harmonic mean between a and b is

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cos (180° -θ)=

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sinθ

- cosθ

- sinθ

None of above

The domain the function : f(x) = x² is given by

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R

Set of all non-negative Real numbers

R^-1

None of these

In an A.P,a +(n-a)d is

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1st term

General term

Last term

None of these

Vector i =

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[1,0]

[0,1,0]

[0,0,1]

None of these

Acidic hydrolysis of acetamide gives

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Acetaldehyde

Acetic acid

Methyl amine

Formic acid

Grignard reagent on reaction with a ketone forms

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Tertiary alcohol

Secondary alcohol

Primary alcohol

Carboxylic acid

Who one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide?

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Carbon monoxide

Diamond

Ethane

Methane

The colour of the transition metal compounds is due to

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p-d transition

d-d transition

s-p transition

None of these

Consider the ground state of Cr atom (Z=24). The numbers of electrons with the azimuthal quantum numbers l = 1 and l = 2 are respectively

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12 and 4

16 and 5

16 and 4

12 and 5

Phenol is a weak acid. The correct order of acid strength of carboxylic acid, phenol and alcohol is

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Carboxylic acid > phenol > alcohol

Carboxylic acid > alcohol > phenol

Phenol > carboxylic acid > alcohol

Alcohol > phenol > carboxylic acid

Drained sewage has B.O.D

Choose an answer

More than that of water

Less than that of water

Equal to that of water

None of the above

A current of 9.65 ampere flowing for 10 minutes deposits 3.0 g of the metal which is monovalent. The atomic mass of the metal is

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10

50

30

96.5

Propyne on hydrolysis in presence of H₂SO₄and HgSO₄gives

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Acetaldehyde

Acetone

Formaldehyde

None

Plastics are a pollution problem because many plastics

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Are made from petroleum

Are very inflammable

Burn to produce toxic fumes

Decompose to produce toxic products

Sp³hybird orbitals are oriented at an angle of

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107.5°

108.5°

109.5°

103.5°

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

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2 - 4 ppm

4 - 6 ppm

2 - 5 ppm

4 - 8 ppm

The raw material to form nylon is

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Adipic acid

Butadiene

Isoprene

Ethylene

The mass of one mole of proton is

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1.008 g

0.184 g

1.673 g

1.008 mg

Teflon, styron and neoprene are all

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Copolymers

Condensation polymers

Homopolymers

Monomers

Oxidation of 2-propanol gives

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Propanone

Butanone

Pentanone

None of these

Free radical mechanism of halogenation of alkanes follow step:

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Initiation

Propagation

Termination

All of these

The free spaces between the metal atoms and its crystal lattice are called

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Valance spaces

Empty spaces

Interstices

None

Which one of the following reagents will distinguish between C₆H₅CHO and C₆H₅COCH₃

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Aqueous bromine

Phosphorus pentachloride

2, 4 DNPH

Tollen's reagent

Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively

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Zinc dust and soda lime

Soda time and zinc dust

Zinc dust and sodium hydroxide

Soda lime and copper

Ethyl alcohol prepared during fermentation is pure:

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20%

10%

11%

12%

Choose an answer

99.2%

99.5%

90.5%

96.2%

β-D-glucose is a monomer for

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Strach

Cellulose

Glycogen

Protein

When two hydrogen atoms approach each other.

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Forces of attraction operate.

Forces of repulsion operate.

Forces of attraction and repulsion operate simultaneously.

Nothing happens.

If half life period of a reaction is independent of the concentration of the reactants, then the reaction is

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Zero order

First order

Second order

Order is in fraction

Which of the following waste material is not recycled for use again

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Paper

Plastic

Hides of animals

Glass

The divisibility of atom was shown by

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Stoney

J.J. Thomson

Millikan

Rutherford

A food chemist wants to create the odour of pineapples for a product. An ester with this odour has the formula C₃H₇COOC₂H_5.Which pair of reagents would produce this ester

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C₂H₅CI and C₃H₇COOH

C₂H₅OH and C₃H₇CONH₂

C₂H₅OH and C₃H₇COOH

C₃H₇OH and C₂H₅COCI

Choose an answer

High temperature and low pressure

Low temperature and high pressure

Low temperature and low pressure

High temperature and high pressure

The formula of calcium superphosphate is

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CaHPO₄

CaH₂PO₄

Ca(H₂PO₄)₂

None of these

A polymer may be

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Linear

Branched

Cross linked

All of these

The word paper is derived from the name of which reedy plany

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Rose

Sun flower

Papyrus

Water hyacinth

When a bond breaks

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Heat is evolved

Heat is absorbs

No change in heat contents takes place

Temperature increases

Which of the following decolorized Br₂-water

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Methane

Ethane

Ethene

Propane

Gypsum is applied to the soil to provide calcium and

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Oxygen

Nitrogen

Phosphorous

Sulphur

Choose an answer

Electrophilic substitution

Free radical reduction

Isomerisation

Nucleophilic substitution

An alkynes having Carbon count of 20 is

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gas

liquid

Solid

None

Which is true about the electronegativity order of the following?

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P > Si

C > N

Br > Cl

Sr > Ca

Which of the hydrogen halides has the highest percentage of character?

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HCl

HBr

HF

Hl

Amylacetate flavour is present in:

Choose an answer

Banana

Apple

Jasmine

Orange

Substituted phenyl groups are called

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acyl groups

phenyl groups

Aryl groups

Alkyle groups

Which of the following chlorocompounds is heat easily hydrolysed by hydorxide ion to give the product indicated

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Which of the following species has the highest ionization potential?

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Ne

Al⁺

Mg⁺

Li⁺

Lattice energy of NaCI

Choose an answer

+5000 KJ

-344 KJ

-776 KJ

-411 KJ

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 rion

Cast iron > steel > wrought iron

Cast iron = steel > wrought iron

Which represents nucleophilic aromatic substitution reaction?

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Reaction of benzene with Cl₂in sunlight

Benzyl bromide hydrolysis with water

Reaction of NaOH with dintrofluoro benzene

Sulphonation of benzene

Methyl alcohol is not used:

Choose an answer

As a solvent

As an anti-freezing agent

As a subsitution for petrol

For denating of ethyle alcohal

In which one of the following compound rings are not fused together at ortho positions

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Phenanthrene

Naphthalene

Diphenyemethane

Anthracene

Natural fertilizers are materials derived from

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Plants only

Animals only

Both plants and animals

None of these

Isotopes differ in

Choose an answer

properties which depend upon mass

arrangement of electrons in orbitals

chemical properties

the extent to which they may be affected in electric fields

The number of unpaired electrons in Fe³⁺(Z = 26) are

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5

6

3

4

Hydrogenation of bezoyl chloride in presence of Pd on BaSO₄gives

Choose an answer

Benzyl alcohol

Benzaldehyde

Benzoic acid

Phenol

The number of elements in the first, second and third period are

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2, 8, 18

8, 2, 18

2, 18, 8

2, 8, 8

In public urinals, we observe some nascent smell. This smell is due to

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Hydrolysis of urea of urine by urease of atmosphere into NH₃and CO₂

Formation of sulphonic acid by urea of urine

Reaction of CO₂of atmosphere with urea monoitrate in urine

Hydrogen present in air reacts with nitrogen forming NH₃

Which is not nitrogeneous fertilizers?

Choose an answer

(NH₄)₂HPO₄

NH₄NO₃

Urea

Calcium phosphate

The valency of noble gases, in general, is

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Zero

One

Three

Two

Coordination sphere may be:

Choose an answer

Cationic

Anionic

Neutral

All above

Wohler succeeded in obtaining, urea from

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Cyanogen

Ammonium cyanate

Ammonium hydroxide

None of these

It is common observation that rates of chemical reactions differ :

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Greatly.

A little bit.

Moderately.

Which one is a nitrogen fertilizer

Choose an answer

Urea

Calcium sulphate

Potassium phospahte

Magnesium carbonate

Which of the following is directly related with entropy

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Pressure

Degree of freedom

Temperature

Both b and c

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

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Zero order

First order

Second order

Third order

Aryl halides are less reactive towards nucleophilic substitution reactions as compared to alkyl halides due to

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The formation of less stable carbonium ion

Resonance stabilization

Larger carbon-halogen bond

The inductive effect

Which of the following fibres are made of polyamides?

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Dacron

Orlon

Nylon

Rayon

The amount of products obtained from the balanced chemical equation is regarded as

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Theoretical yield

Actual yield

% yield

Experimental yield

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

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Nitrides

Nitrites

Nitriles

Cyanides

Which is liquid among the following alkenes?

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Ethane

Propene

Butene

Pentene

Choose an answer

1

2

3

4

An organic compound will decolorise dill acidified (aq) KMnO₄on warming, but will not decolorise bromine water. What is the compound

Choose an answer

KMnO₄

Ethanol

Ethane

CH₃CH₂Cl

Which one of the following has been hydroxyl and carboxylic acid groups

Choose an answer

Phenols

Picric acid

Phthalic acid

Salicylic acid

A solutiion of 0.5 mole camphor in 100 grmas chloroform (K_b= 0.322) has rise in boiling point than that of chloroform by

Choose an answer

0.81°C

1.61°C

1.81°C

0.61°C

96500 C electricity is passed through CuSO₄. The amount of copper precipitated is

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0.25 mole

0.5 mole

1.0 mole

2.00 mole

Which set of hybrid orbitals has planar triangle shape?

Choose an answer

sp³

sp

sp²

dsp²

Which element does not belong to 4d series

Choose an answer

Y

Zr

Mo

Zn

Choose an answer

Introduction of an inert gas at constant volume

Introduction of PCl₃(g) at constant

Introduction of PCl₅(g) at constant volume

Introduction of Cl₂at constant volume

Volcanoes produce SO₂:

Choose an answer

47%

57%

67%

77%

In a reversible reaction, two substances are in equilibrium. If the concentration of each one is reduced to half, the equilibrium constant will be

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Reduced to half of its original value

Doubled

Same

Reduced to one fourth its original value

The solid remained on filter paper during filtration is called the

Choose an answer

Substance

Residue

Undue

Filtrate

A buffer solution of 0.1 molar HCOOH and 0.1 molar HCCONa has pH = 3.78 To is 0.01 molar HCl is added, then pH of the buffer solution becomes

Choose an answer

2.78

4.78

3.78

3.70

Subsidiary quantum number specifies

Choose an answer

size of orbital

shape of orbital

orientations of orbitals

Nuclear stability

The most reactive compound for electrophilic nitration will be

Choose an answer

Benzyl chloride

Benzoic acid

Nitrobenzene

Chlorobenzene

Factor which slows down the rate of reaction is

Choose an answer

Small size of the particles of the reactant

High temperature of reaction

More concentration of reactant

Lowering the temperature

The mathematical form of fist law of thermodynamics is

Choose an answer

NaHCO₃is prepared by

Choose an answer

Down's process

Solvay's process

Nelson's process

None of these

Baking powder has which one of the following formula

Choose an answer

Na₂CO₃

Na₂SO₄

NaHCO₃

K₂CO₃

Reaction of acids with alcohols is also known as

Choose an answer

Esterification

Saponification

Alkalization

None

Sodium forms largely

Choose an answer

Normal oxides

Per-oxides

Superoxides

None of these

Iodine value of an oil or fat may be defined as

Choose an answer

The number of grams of iodine taken up by 1 g of the oil or fat

The number of grams of iodine taken by 10 g of the oil or fat

The number of grams of iodine taken by 100 g of the oil or fat

None of the above

Which of the following discoveries resulted in a version of the Mendeleefs

periodic law

Choose an answer

The nucleus of atom by Rutherford

The elements polonium and radium by the Curies

Atomic numbers by Moseley

x-rays by Roentgen

Cotton has cellulose in it:

Choose an answer

96%

97%

98%

99%

Choose an answer

4-methyl pentene

2-methyle-1-butene

2-methyl propane

None of the above

Sodium should be stored in

Choose an answer

Air free from moisture

Air free form carbon dioxide

Under water

Under kerosene oil

Choose an answer

[A] = [B]

[A] < [B]

[B] = [C]

[A] > [B]

Alkyl halides react with lithium dialkyl copper reagents to give

Choose an answer

Alkenes

Alkyl copper halides

Alkanes

Alkenyl halides

Aniline reacts with which of these to form Schiff base?

Choose an answer

Acetic acid

Bezaldehyde

Acetone

NH₃

Which is the derived lipid?

Choose an answer

Common fats

Vitamin-D

Common oils

Spinolipids

Which property is not present in Al?

Choose an answer

Reacts with acid

Reacts with bases

Changes litmus paper

Changes methyle orange colour

The charge over mass ratio of electron is:

Choose an answer

1.6 x 10^-1 C Kg^-1

9.1 x 10^-31 C Kg^-1

1.7588 x 10¹¹ C Kg^-1

6.62 x 10^-34 C Kg^-1

Linear shape is associated with set of hybrid orbitals?

Choose an answer

sp

sp2

sp3

dsp2

AgCl is soluble is

Choose an answer

Aqua regia

H₂SO₄

HCl

NH₃

Naphthalene, iodine and NH_{4 can :}

Choose an answer

Sublime.

Both (a) and (c).

Crystallize.

None of above.

Ethanol (alcohol) as a type of:

Choose an answer

Electric fuel

Bio fuel

Nuclear fuel

None of these

Fluids have three types of energies. The Bernoulli's equation combines those energies.which of the following is one of the three enrgies possessed by a fluid?

Choose an answer

potential energy

pressure energy

strain energy

(a) and (b) only

The efficiency of diesel engine is

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25%

25 - 30%

35%

35 - 40%

The e/m of an electron moving in a circular path in a magnetic field is equal to

Choose an answer

V/Br

V/B²r²

V²/Br²

V²/Br

When the surfaces are coated with a lubricant, then they

Choose an answer

Stick to each other

Slide upon each other

Roll upon each other

None of these

During the negative half-cycle of the half-wave rectification, the diode

Choose an answer

does not conduct

conducts

either of these

none of these

The loudness and pitch of a sound note depends on

Choose an answer

Intensity and velocity

Frequency and velocity

Intensity and frequency

Frequency and number of harmonic

For addition and subtraction purposes, absolute uncertainties are:

Choose an answer

Added

Subtracted

Multipiled

Divided

Beta particles are

Choose an answer

hydrogen nuclei

helium nuclei

electrons

photons

The vector is space has:

Choose an answer

One Component

Two Compnents

Three Components

Non of these

When some compass needles are placed on a card board along a circle with the center at the wire, they will

Choose an answer

Point the direction of N-S

Set themselves tangential to the circle

Point in the direction of E-W

None of these

Point in direction of S-E

The sum of two or more vectors is equal to a single vector which is called:

Choose an answer

Component vector

Resultant vector

Product vector

None of these

Battery is charged in motor cars, which is based on

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Chemical effect

Magnetic effect

Electric effect

None

Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is

Choose an answer

Less than atmospheric pressure

Much less than atmospheric pressure

Greater than atmospheric pressure

Much greater than atmospheric pressure

Both C and D

1 gm-cm^-3is equal to:

Choose an answer

10³kg-m^-3

10^-3kg-m^-3

1 kg-m^-3

10⁶kg-m^-1

An inkjet printer uses in its operation:

Choose an answer

Neutrons only

Mesons only

Positrons and photons

An electric charge

None of these

At low speeds, the drag force is

Choose an answer

proportional to speed

inversely proportional to speed

not simply proportional to speed

none of them

The perpendicular distance from the axis of rotation to the line of action of force is called:

Choose an answer

Moment arm

Moment of a force

Torque

Non of these

The second law gives the relationship between

Choose an answer

mass and velocity

force and acceleration

velocity and acceleration

mass and weight

Which one of the following is dimensionless.

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Acceleration

Velocity

Density

Angle

When a stress changes length, it is called the

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compressional stress

tensile stress

shear stress

any one of them

In case of metallic conductors, the charge carriers are

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Protons

Electrons

Antiprotons

Positrons

Both A and B

The units of modulus of elasticity are

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Nm^-2

Nm

ms^-1

Pascal

Referring to the above figure, we can say that of all the elements, the most stable element is

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Phosphours

Iron

uranium

Lithium

Bismuth

Two bodies of masses 1 kg and 5 kg are dropped gently form the top of a tower. A a point 20 cm from the ground both the bodies will have the same

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Momentum

Kinetic energy

Velocity

Total energy

One mole of any substance contain

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same number of molecules

different number of molecules

may be same or different

none of them

Conventional the angular Velocity is Directed at an angle of:

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90° to the axis of rotation

30° to the axis of rotation

0° to the axis of rotation

None of above

A body moving along the circumference of a circle of radius R completes one revolution. The radius of the covered path to the angle subtended at the center is:

Choose an answer

Radius of the circle

Twice the radius

Thrice the radius

None of these

Acceleration in a body is always produced in the direction of :

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Velocity

Weight

Force

Both B and C

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

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Pressure

Work

Density

Force

Referring to above figure, due to change in current in the coil P, the change in magnetic flux

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Is associated with coil P

Is associated with coil S

Causes and induced current in coil S

All of these

None of these

Conversion of alternating current into direct current is called

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amplification

rectification

conduction

polarization

Electron gun consist of

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three anodes

heating cathode

three anodes

three anodes , heating cathode, grid

While deriving equation of pressure by kinetic theory of gases, we take into account:

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Only linear motion of molecules

Only rotational motion

Only vibratory motion

All of these

The wave form of SHM is

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Pulsed wave

Square wave

Triangular waved

Sine wave

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

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deuteron

deterium

protium

tritium

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 the coil

Relative motion of the loop and magnet

Any one of above

All above

The motional e.m.f depends upon the

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Length of a conductor

Strength of a magnet

Speed of the conductor

All of the above

According to Huygen's principle

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light travels in straight line

Light is a transvers wave

Light has dual nature

All points on the primary wave-front are the sources of secondary wavelets

The free electrons in metals:

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Are in random motion and their speed depends upon temperature

Move in particular direction

Move with speed of light

Move such that their speed does not depend on their temperature

None of these

The SI units of momentum is

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kg m s^-2

kg ms

kg m s²

N-s

Bodies failing freely under gravity provide good example of motion under

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non-uniform acceleration

uniform acceleration

variable acceleration

increasing acceleration

By placing a dielectric in between the charges, the electrostatic force between them

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Is always reduced

Is always increased

Is not affected

Is increased one million times

None of these

The total reactance of a series RLC circuit at resonance is

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zero

Equal to the resistance

Infinity

Capacitive

Radio telescope is used to gather information from

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Earth

Moon only

Far side of the universe

Sea water

The CRO deflects the beam of electrons, when they passes through uniform

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electric field

gravitational field

magnetic flax

magnetic field

An ideal choke (used along with fluorescent tube) would be

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A pure resistor

A pure capacitor

A pure inductor

A combination of an inductor and a capacitor

Nucleon means:

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Only electrons

Only neutrons

Only protons

Both (A ) and (C)

Both (B) and (C)

When two spherical conducting balls at different potentials are joined by a metallic wire, after some time:

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Both the conductors are at the same potential

Potential difference across the conductors remain constant

Potential difference across the conductors becomes zero

Both (A) and (B)

Both (A) and (C)

Which of the following material has smaller has life

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uranium

polonium

radium

radian

The electric field lines start from:

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Positive charge

Negative charge

Either A and B

Neutron

An atom

The ultimate source of money sources of energy is:

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Sun

Air

Water

Petroleum

In the expression F x t, the force F is

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total force

instantaneous force

average force

all of them

Compton shift refers to:

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Photon

Meson

Proton

Positron

Both (B) and (D)

In the text book, the transistor amplifier circuit is a:

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Common emitter circuit

Common collector circuit

Common base circuit

Any of these

None of these

A particle having mass and charge equal to that of an electron is called:

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Proton

Positron

Pion

Pi-meson

Both (C) and (D)

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

Choose an answer

Q/4πr²

2Q/4πr²

Q.d

Zero

Crests and troughs are formed in:

Choose an answer

Longitudinal waves

Transverse waves

Both of these

None of these

Radium was discovered by:

Choose an answer

Becquerel

Marie curie

Pierre curie

Rutherford

Both (B) and (C)

Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V:

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45 V

15 V

90 V

300 V

Two dissimilar metals joined at their ends kept at constant temperature constitute:

Choose an answer

Cell

Voltmeter

Thermocouple

Potentiometer

None of these

Amperean path is a:

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Closed path

Rectangular path

Circular path

Any of above

Broken path

In a transistor, collector current is controlled by

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Collector voltage

Base current

Collector resistance

All of the above

Unit vector is used to specify:

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Magnitude of a vector

Dimensions of a vector

Direction of a vector

Position of a vector

There is present in paraffin a large amount of:

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Nitrogen

Hydrogen

Carbon

Baryllium

Lithium

Tick the series which lies in the visible region:

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Lyman series

Balmer series

Paschen series

Brackett series

P fund series

The value for systolic blood pressure for a normal healthy person is

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140 torr

80 torr

90 torr

120 torr

Position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. This is the statement of

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photoelectric effect

pair production

Compton effect

uncertainty principle

If the acceleration of a body is not uniform, then velocity-time graph will be:

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Curve

Straight line

Sphere

All of these

Micheal Faraday and joseph Henry belong respectively to:

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USA and England

England and France

England and USA

USA and France

None of these

In half wave rectification

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both halves of the input voltage is used

only one half of the input voltage is used

either of these

none of these

When an oscillatory motion repeats itself, then this type of motion is called

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vibratory motion

constant motion

fixed motion

periodic motion

According to the special theory of relativity

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mass and energy are same entities

mass and energy are same entities but interconverible

mass and energy are different entities but interconverible

mass and energy are different entities but non-interconveritble

A car travels first half distance between two places with a speed of 30 km/h and remaining half with a speed of 50 km/h. The average speed of the car is

Choose an answer

37.5 km/h

10 km/h

42 km/h

40 km/h

The rate of decay of a radioactive substance

Choose an answer

decrease exponentially with time

decreases linearly with time

increases linearly with time

increases exponentially with time

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)

Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as

Choose an answer

ON switch

off switch

function switch

none of these

Physics is one of the branches of:

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Social sciences

Physical sciences

Biological sciences

Abstract art

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

If x-component of a vector is -3 N and y-component is 3 N, then angle of resultant vector will x-axis is:

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45°

315°

135°

225°

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

The current of 1 ampere is passing through a conductor. The charge passing through it in half a minute is:

Choose an answer

One coulomb

0.5 coulomb

30 coulomb

2 coulombs

None of these