# MCQ on Heat for class 7:

The MCQ on Heat questions and answers is prepared for class 7, Class 9, class 10, and NEET students. These fully solved MCQ on Heat questions apply to all Schools students, freshers or experienced as well as various tests & contests in colleges. Students can enhance their knowledge through regular practice which will help them crack an exam. Free PDF Download of Tissue NEET MCQ.

## Heat MCQ for class 7:

1. Heat is measured in___________

A) Joule

B) Calorie

C) both A and B

D) Joule/second

2. 1 cal. =?

A) 1.2 joule

B) 3.2 joule

C) 4.2 joule

D) none of the above

3.Heat capacity depends on___________

A) change in temperature

B) Mass of body

C) Nature of substance

D) All the above

4. Does the temperature of a body depends on the mass of the body?

A) Yes

B) No

C) Cannot say correctly

D) None of these

5. Heat capacity per unit mass of a body is called____________

A) Latent heat

B) Specific heat

C) Heat energy

D) None of these

6.Heat is measured by___________

A) Calorimeter

B) Thermometer

C) Lactometer

D) Hydrometer

7.Temperature is measured by____________

A) Calorimeter

B) Thermometer

C) Lactometer

D) Hydrometer

8. As the rain falls the potential energy changes to__________

A) thermal energy

B) chemical energy

C) kinetic energy

D) nuclear energy

9. In the process of rubbing hands, mechanical energy is converted into_________

A) sound energy

B) electrical energy

C) thermal energy

D) heat energy

10. According to Stefan’s law, the total radiation from a black body per second per unit area is proportional to_________

A) absolute temperature

B )T2

C) T5

D) t

11.Cork is a good insulator because it has____________

A) free electrons

B) atoms colliding frequency

C) low density

D) porous body

12. When heat is transferred from one particle of a hot body to another by the actual motion of the heated particles, it is referred to as heat transfer by_____________

A) conduction

B) convection

D )conduction and convection

13. Which one of the following is a reliable measure?

A) Hotness

B) Coldness

C) Temperature

(d) None of these

14. The pressure of the steam inside the pressure cooker is____________

A) 2 atmosphere

B) 3 atmosphere

C) 4 atmosphere

D) 5 atmosphere

15. The amount of heat required to raise the temperature of a substance by one Kelvin is___________

A) Thermal capacity

B) Specific heat capacity

C) Latent heat

D) None of the above

16. The change from the solid to gaseous state directly without becoming liquid is called____________

A) Sublimation

B) Freezing

C) Condensation

D) Vapourisation

17. Thermal conductivity of solid metals with rising in temperature normally_______

A) increases

B) decreases

C) remains constant

D) may increase or decrease depending on the temperature

18. Heat transfer takes place as per ________

A) zeroth law of thermodynamics

B) first law of thermodynamic

C) second law of the thermodynamics

D) Kirchoff’s law

19. Unit of thermal conductivity in S.I. units is____________

A) J/m2 sec

B) J/m °K sec

C) W/m °K

(D) B and C above.

20. The literature on heat transfer generally recognizes distinct modes of heat transfer. How many modes are there?

A) One

B) Two

C) Three

D) Four