1. 1 k.cal = ....... J
A) 4.18 B) 41.8 C) 418 D) 4180
Ans: D
2. 273°C = .......K
A) 0 B) 546 C) 273 D) -273
Ans: B
3. Heat lost by hot body = Heat gain by cold body is indicate ....
A) Conservation of Mass B) Conservation of Momentum
C) Conservation of Energy D) Conservation of Acceleration
Ans: C
4. What is the cause, water droplets on window glass during winter early morning?
A) Dew B) Fog C) Humidity D) Latent Heat
Ans: A
5. Choose correct matching:
P) Heat X) Calorie
Q) Specific Heat Y) Calorie/ gm
R) Latent Heat Z) Calorie/gmX°C
A) P-Z Q-X R-Y
B) P-X Q-Y R-Z
C) P-Y Q-Z R-Z
D) P-X Q-Z R-Y
Ans: D
6. In a hot boiled egg, egg yolk (yellow part) will be hotter than egg white because ......
A) Specific heat of egg yolk is high
B) Specific heat of egg white is high
C) Specific heat of both egg yolk and egg white is same
D) None of these
Ans: A
7. Humidity is more at ......
A) Mountains B) Oceans
C) Deserts D) Plane areas
Ans: B
8. What is the quantity of heat required to convert 10 gm of ice into water?
A) 540 calories B) 80 calories
C) 54 calories D) 800 calories
Ans: D
9. When 50 calories of heat is supplied to 10 gm of water, the rise in temperature of water is
A) 60°C B) 40°C C) 10°C D) 5°C
Ans: D
10. In a pressure cooker, cooking is faster because of....
A) Increase of specific heat of water
B) Decrease of specific heat of water
C) Increase of boiling point of water
D) Decrease of boiling point of water
Ans: C
11. The change of phase from liquid to gas that occurs at the surface of a liquid is called ....
A) Melting B) Freezing
C) Condensation D) Boiling
Ans: D
12. SI Unit of specific heat -
A) J/Kelvin B) J/K.g
C) J.Kg/Kelvin D) J/Kg-K
Ans: D
13. Which of the following is an example of condensation?
A) Water changes into ice
B) Wet clothes changes into dry
C) Water changes to vapour
D) Formation of dew
Ans: D
14. 127°C + 400 K + x = 1000 K. Then value of x is
A) 200 K B) 273 K C) 473 K D) 800 K
Ans: A
15. The final temperature of a mixture of 100 g of water at 30°C temperature and 100 g of water at 60°C temperature is
A) 45°C B) 70°C C) 90°C D) 130°C
Ans: A
16. Latent heat of vapourisation of water is .....
A) 540 cal/ gm B) 80 cal/ gm
C) 100 cal/ gm D) 0 cal/ gm
Ans: A
17. The total energy of the system is called ....
A) Kinetic energy B) Potential energy
C) Internal energy D) Rotational energy
Ans: C
18. Which of the following has highest specific heat of the substance?
A) Glass B) Mercury C) Copper D) Water
Ans: D
19. Which of the following is a cooling process?
A) Condensation B) Evaporation
C) Melting D) All of these
Ans: B
20. A body temperature is 30°C and B body temperature is 35°C, then the direction of heat flow is...
A) B ® A B) A ® B C) A = B D) B = A
Ans: A
