set 8 MCQ Questions & Answers Detailed Explanation

Question : 1

Match List I with List II and select the correct answer using the codes given below the lists:

a) A – 3, B – 1, C – 2, D – 4

b) A – 2, B – 3, C – 4, D – 1

c) A – 2, B – 1, C – 3, D – 4

d) A – 3, B – 4, C – 1, D – 2

Question : 2

Which of the following statements is/ are false about mode of heat transfer?

1. In radiation, heat is transfered from one medium to another without affecting the intervening medium
2. Radiation and convection are possible in vaccum while conduction requires material medium.
3. Conduction is possible in solids while convection occurs in liquids and gases.

a) II only

b) I only

c) II and III

d) I, II and III

Question : 3

In the season of summer, we experience a humid heat when weather

a) Middle of summer

b) Scorching weather

c) Start of summer

d) Humid weather

Question : 4

The wavelength of radiation emitted by a body depends upon

a) the temperature of its surface

b) the nature of its surface

c) the area of its surface

d) All of the above

Question : 5

At a given temperature the internal energy of a substance

a) in liquid state is more than that in gaseous state

b) in liquid state is equal to that in gaseous state

c) in liquid state is less than that in gaseous state

d) is equal for the three states of matter

Question : 6

A solid cube and a solid sphere of the same material have equal surface area. Both are at the same temperture 120°C , then

a) the sphere cools down faster than the cube

b) both the cube and the sphere cool down at the same rate

c) the cube cools down faster than the sphere

d) whichever is having more mass will cool down faster