mock-1 | Free Mock Test 2026 | 150 MCQs

Question 1

Which of the following is the SI unit of luminous intensity?

Accepted Answer

A) Candela

Question 2

The dimensional formula of Planck's constant is identical to that of

Accepted Answer

C) Angular momentum

Question 3

A student measures the length of a rod as 25.0 cm using a scale with least count 0.1 cm. The relative error in measurement is

Accepted Answer

A) 0.004

Question 4

In dimensional analysis, which of the following quantities has dimensions different from the other three?

Accepted Answer

D) Strain

Question 5

The SI base unit for amount of substance is

Accepted Answer

A) Mole

Question 6

Which error in measurement cannot be eliminated by taking the arithmetic mean of large number of observations?

Accepted Answer

B) Systematic error

Question 7

If force F, velocity V and time T are taken as fundamental quantities, the dimensional formula for mass is

Accepted Answer

A) [F V⁻¹ T]

Question 8

The dimensional formula [M⁰L⁰T⁻¹] corresponds to which physical quantity? / [M⁰L⁰T⁻¹]

Accepted Answer

C) Both A and B (A

Question 9

The law of reflection states that

Accepted Answer

C) Both A and B (A

Question 10

Total internal reflection occurs when light travels from

Accepted Answer

A) Denser to rarer medium at angle greater than critical angle

Question 11

In a Young's double slit experiment, the central fringe is

Accepted Answer

A) Bright

Question 12

Which phenomenon explains the working of polaroid sunglasses?

Accepted Answer

A) Polarization

Question 13

The magnifying power of a simple microscope is maximum when the image is formed at

Accepted Answer

A) Near point

Question 14

Which of the following EM radiations has the highest frequency?

Accepted Answer

A) Gamma rays

Question 15

Heat transfer by radiation does not require any medium. This is an example of

Accepted Answer

A) Electromagnetic waves

Question 16

The coefficient of linear expansion of a solid is α. On heating, its moment of inertia about an axis through centre of mass will increase by a factor approximately

Accepted Answer

A) (1 + 2αΔT)

Question 17

At which temperature do the Celsius and Fahrenheit scales show the same numerical value?

Accepted Answer

A) -40°

Question 18

10 g of ice at 0°C is mixed with 10 g of water at 20°C. The final temperature of mixture is (Latent heat of ice = 80 cal/g) / 0°C

Accepted Answer

A) 0°C

Question 19

Water has maximum density at

Accepted Answer

A) 4°C

Question 20

The calorific value of a fuel is expressed in

Accepted Answer

A) kJ/kg

Question 21

The speed of sound is maximum in

Accepted Answer

A) Solids

Question 22

Echo is produced due to ______ of sound.

Accepted Answer

A) Reflection

Question 23

The apparent change in frequency due to relative motion between source and observer is called

Accepted Answer

A) Doppler effect

Question 24

SONAR is based on the principle of / SONAR

Accepted Answer

A) Reflection of ultrasonic waves

Question 25

Two sound waves of frequencies 256 Hz and 260 Hz are sounded together. The beat frequency heard is / 256 Hz

Accepted Answer

A) 4 Hz

Question 26

Which of the following is a vector quantity?

Accepted Answer

A) Impulse

Question 27

A projectile is fired at 45° to the horizontal. Its range is R. The maximum height reached is

Accepted Answer

A) R/4

Question 28

If the momentum of a body is doubled, its kinetic energy becomes

Accepted Answer

A) 4 times (4

Question 29

Kepler's second law (law of equal areas) implies that

Accepted Answer

A) Areal velocity is constant

Question 30

Hooke's law is applicable within

Accepted Answer

A) Elastic limit

Question 31

The centre of mass of a uniform solid cone of height h lies at a distance from its base of

Accepted Answer

B) h/3

Question 32

The magnetic field lines inside a bar magnet

Accepted Answer

A) Move from south to north

Question 33

The magnetic pole strength has the SI unit

Accepted Answer

A) Am

Question 34

The force between two magnetic poles is inversely proportional to

Accepted Answer

A) Square of distance

Question 35

Which material is strongly attracted by a magnet?

Accepted Answer

A) Ferromagnetic

Question 36

Two point charges +3 μC and -3 μC are placed 2 m apart. The electric potential at the midpoint is / +3 μC

Accepted Answer

A) Zero

Question 37

Two resistors 6 Ω and 3 Ω are connected in parallel. The equivalent resistance is / 6 Ω

Accepted Answer

A) 2 Ω

Question 38

Kirchhoff's first law (junction rule) is based on conservation of

Accepted Answer

A) Charge

Question 39

A 100 W, 220 V bulb is operated at 110 V. The power consumed will be approximately / 100 W, 220 V

Accepted Answer

A) 25 W

Question 40

The direction of induced current is given by

Accepted Answer

C) Both A and B (A

Question 41

A step-up transformer increases

Accepted Answer

A) Voltage

Question 42

Joule's law of heating states that heat produced is proportional to

Accepted Answer

A) Square of current

Question 43

Which of the following is not a property of anode rays?

Accepted Answer

D) They are emitted from cathode

Question 44

According to Bohr's model, the angular momentum of an electron in the nth orbit is

Accepted Answer

A) nh/2π

Question 45

In a nuclear fission reaction, the mass of products is slightly less than the original mass. This missing mass appears as

Accepted Answer

A) Energy according to E=mc²

Question 46

Isotones are atoms of different elements having the same number of

Accepted Answer

A) Neutrons

Question 47

The half-life of a radioactive substance is 10 days. After 30 days, the fraction of the substance remaining will be

Accepted Answer

A) 1/8

Question 48

Which among α, β, γ radiations has the highest ionising power? / α, β, γ

Accepted Answer

A) α

Question 49

The atomic bomb works on the principle of

Accepted Answer

A) Nuclear fission

Question 50

In a p-n junction diode, the depletion region contains / p-n

Accepted Answer

A) Immobile ions

Question 51

The logic gate whose output is HIGH only when all inputs are HIGH is

Accepted Answer

A) AND gate (AND

Question 52

Zener diode is primarily used as

Accepted Answer

A) Voltage regulator

Question 53

A transistor in common emitter mode acts as an amplifier when

Accepted Answer

A) Base-emitter junction is forward biased and collector-base reverse biased

Question 54

Modulation is the process of

Accepted Answer

A) Superimposing message signal on high frequency carrier wave

Question 55

Which of the following is a compound?

Accepted Answer

A) Water

Question 56

The gas law that relates pressure and volume at constant temperature is

Accepted Answer

A) Boyle's law

Question 57

One mole of CO₂ contains how many atoms of oxygen? / CO₂

Accepted Answer

A) 2 × 6.022 × 10²³

Question 58

In the reaction 2H₂ + O₂ → 2H₂O, if 4 g of H₂ reacts completely, the mass of water formed is

Accepted Answer

A) 36 g

Question 59

Dalton's atomic theory could not explain

Accepted Answer

A) Isotopes

Question 60

Which of the following is a chemical change?

Accepted Answer

A) Rusting of iron

Question 61

Baking soda is chemically

Accepted Answer

A) NaHCO₃

Question 62

Bleaching powder is obtained by the action of chlorine on

Accepted Answer

A) Dry slaked lime

Question 63

The pH of a 10⁻⁸ M HCl solution at 25°C is approximately / 25°C

Accepted Answer

A) 6.98

Question 64

A salt formed from weak acid and strong base will have pH

Accepted Answer

A) Greater than 7 (7