mock-1 | Free Mock Test 2026 | 150 MCQs

Question 1

The dimensional formula of Planck's constant is

Accepted Answer

A) [ML²T⁻¹]

Question 2

Which error is caused by sudden changes in experimental conditions such as temperature or voltage fluctuation?

Accepted Answer

B) Random error

Question 3

The SI base unit of luminous intensity is

Accepted Answer

A) Candela

Question 4

The value 2.3065 cm rounded to three significant figures is / 2.3065

Accepted Answer

B) 2.31 cm

Question 5

The splitting of white light into its constituent colours is due to

Accepted Answer

C) Dispersion

Question 6

A mirage is an example of

Accepted Answer

A) Total internal reflection

Question 7

Two coherent sources are necessary to observe a sustained

Accepted Answer

A) Interference pattern

Question 8

Polaroid sunglasses reduce glare by using the principle of

Accepted Answer

C) Polarization

Question 9

When water is heated from 0°C to 4°C, its volume

Accepted Answer

B) Decreases

Question 10

Which temperature scale has the same increment size as the Celsius scale?

Accepted Answer

B) Kelvin

Question 11

The latent heat of fusion of ice is

Accepted Answer

A) 80 cal/g

Question 12

The calorific value of a fuel is expressed in

Accepted Answer

A) kJ/kg

Question 13

Echo is produced due to

Accepted Answer

A) Reflection of sound

Question 14

The speed of sound is maximum in

Accepted Answer

A) Solids

Question 15

The frequency of a sound wave determines its

Accepted Answer

A) Pitch

Question 16

SONAR works on the principle of

Accepted Answer

B) Echo of ultrasonic waves

Question 17

Which of the following is a vector quantity?

Accepted Answer

C) Momentum

Question 18

A body in uniform circular motion has

Accepted Answer

B) Constant speed

Question 19

The friction force acting on a body just before it starts moving is called

Accepted Answer

C) Limiting friction

Question 20

A projectile has maximum range when the angle of projection is

Accepted Answer

B) 45°

Question 21

A ball is dropped from a height. Its total mechanical energy

Accepted Answer

C) Remains constant

Question 22

The centre of mass of a uniform solid sphere lies

Accepted Answer

A) At its geometric centre

Question 23

Kepler’s second law (law of equal areas) is a consequence of

Accepted Answer

C) Conservation of angular momentum

Question 24

Hooke’s law is applicable within

Accepted Answer

B) Elastic limit

Question 25

Magnetic lines of force inside a bar magnet travel from

Accepted Answer

B) South to North pole

Question 26

The pole strength of a bar magnet is measured in

Accepted Answer

B) Ampere-metre

Question 27

The force between two magnetic poles obeys

Accepted Answer

B) Inverse square law

Question 28

Which material has the highest relative permeability?

Accepted Answer

C) Soft iron

Question 29

Two point charges +2μC and −2μC are placed 10 cm apart. The electric dipole moment is

Accepted Answer

A) 2 × 10⁻⁷ C-m

Question 30

Coulomb’s law in vector form gives force along the line joining two charges. For like charges, the force is

Accepted Answer

B) Repulsive

Question 31

Three resistors each of 3 Ω are connected in parallel. The equivalent resistance is

Accepted Answer

A) 1 Ω

Question 32

A cell of emf 12 V and internal resistance 2 Ω is connected to a 10 Ω resistor. The terminal voltage is / 12 V

Accepted Answer

A) 10 V

Question 33

Which device works on the principle of electromagnetic induction?

Accepted Answer

B) Transformer

Question 34

Fleming's left hand rule gives the direction of

Accepted Answer

B) Force on a current-carrying conductor

Question 35

Lenz’s law is a consequence of conservation of

Accepted Answer

B) Energy

Question 36

In an AC generator, the conversion of mechanical energy to electrical energy is based on

Accepted Answer

B) Electromagnetic induction

Question 37

Cathode rays consist of

Accepted Answer

B) Electrons

Question 38

In Rutherford’s alpha scattering experiment, most alpha particles passed undeflected because

Accepted Answer

B) Most of the atom is empty space

Question 39

Gamma rays are

Accepted Answer

C) Electromagnetic waves

Question 40

The mass defect in a nucleus is due to

Accepted Answer

A) Binding energy

Question 41

The half-life of a radioactive substance is 10 days. After 30 days, what fraction remains?

Accepted Answer

C) 1/8

Question 42

Nuclear fusion is the principle of

Accepted Answer

B) Hydrogen bomb

Question 43

A p-n junction diode offers low resistance when

Accepted Answer

B) Forward biased

Question 44

A Zener diode is primarily used as

Accepted Answer

B) Voltage regulator

Question 45

The logic gate represented by Y = A·B is / Y = A·B

Accepted Answer

B) AND

Question 46

In amplitude modulation, the parameter of carrier wave that is varied is

Accepted Answer

B) Amplitude

Question 47

A transistor in common emitter configuration acts as a

Accepted Answer

C) Voltage amplifier

Question 48

Chromatography is used for

Accepted Answer

B) Separating mixtures

Question 49

Avogadro’s number is the number of particles in

Accepted Answer

B) 1 mole of substance (1

Question 50

Dalton’s atomic theory could not explain

Accepted Answer

C) Isotopes

Question 51

The gas law PV = nRT combines / PV = nRT

Accepted Answer

A) Boyle’s and Charles’s laws

Question 52

The number of moles in 36 g of water (H₂O) is / 36

Accepted Answer

B) 2

Question 53

An example of a physical change is

Accepted Answer

C) Melting of ice

Question 54

Bleaching powder is chemically

Accepted Answer

A) CaOCl₂

Question 55

Baking soda on heating produces

Accepted Answer

A) Na₂CO₃ + CO₂ + H₂O

Question 56

Plaster of Paris sets to form

Accepted Answer

A) CaSO₄·2H₂O

Question 57

Washing soda is

Accepted Answer

A) Na₂CO₃·10H₂O

Question 58

A solution with pH = 3 is how many times more acidic than pH = 6 solution? / pH = 3

Accepted Answer

D) 1000 times (1000

Question 59

In the redox reaction Zn + Cu²⁺ → Zn²⁺ + Cu, the oxidizing agent is

Accepted Answer

B) Cu²⁺

Question 60

Blue vitriol has water of crystallization equal to

Accepted Answer

A) 5

Question 61

Oxidation number of Mn in KMnO₄ is / KMnO₄

Accepted Answer

D) +7

Question 62

A solution that contains the maximum amount of solute at a given temperature is called

Accepted Answer

B) Saturated

Question 63

Which quantum number determines the shape of an orbital?

Accepted Answer

B) l

Question 64

The photoelectric effect confirmed the particle nature of

Accepted Answer

B) Light