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Class 11 Physics: Thermal Properties of Matter
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MCQs on temperature measurement, ideal-gas equation, absolute temperature, thermal expansion, matter specific heat capacity, calorimetry, state changes, heat transfer and cooling newtons law.

Class 11 Physics: Thermal Properties of Matter
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25 Questions

1. What is the principle of a calorimeter?
2. The electromagnetic energy emitted by a perfect radiator corresponding to a temperature T and surface area A is?
3. Same amount of heat is added to two substances of same mass having specific heat capacities s1 & s2 such that s1 > s2. Select the correct statement.
4. Condensation temperature is the same as evaporation temperature. True or False?
5. The temperature of 50g of water has to be risen from 15°C to 85°C by using steam at 120°C. What is the amount of steam, in gms, required for the same? Sw= 1cal/ g°C, Lvap = 540cal/g, Ssteam =0.48cal/g°C.
6. Quantitatively heat conduction can be described as?
7. Select the correct statement
8. For a constant volume gas thermometer select the correct statement.
9. A uniform metal sheet has a hole in its centre. What happens to hole when the sheet is uniformly heated?
10. A closed container contains 0.6m3 of neon gas at 200K temperature and 1.3*105Pa. Find the rise in temperature when 8360 J of heat is supplied to it. The molar heat capacity of neon at constant volume is 3.2calK-1mol-1. Assume the container doesn't expand on heating.
11. A steel and a copper bar are joined end to end. The area of the steel bar is half the area of the copper bar. Their lengths are equal to 10cm each. Temperature of free ends of steel & copper rod are 0°C & 100°C respectively. KS = 50 J/smK & KC =384 J/smK. Calculate equivalent thermal conductivity of the combined bar.
12. Temperature is 300K. Convert it into ℉.
13. A liquid cools from 65°C to 55°C in 5 mins. If the surrounding temperature is 35℃, calculate the time taken for temperature to fall from 45°C to 35°C.
14. Select the correct statement for melting of any substance.
15. What is absolute zero?
16. Select the correct statement.
17. A rod having α = 1*10-5per °C and length of 70cm has one of its end rigidly connected to another rod of length 1m and α= 0.5*10-5per °C. Find the new length of the two joined rods when their temperature is increased by 30℃.
18. The rate of cooling of water increases with fall in temperature. True or False?
19. What is the value of Wien’s constant?
20. CV of a gas is 8 calK-1mol-1. Find CP/CV. Assume R = 2 calK-1mol-1.
21. Change of phase occurs at a constant temperature, which implies that even on addition of heat to a substance temperature remains constant. True or False?
22. What is the net amount of energy per unit time being received by a body having a temperature of 40 °C in a surrounding of 60°C? (The surface area of body = 2m2, σ = 5.67*10-8W/ m2K4 & emissivity of 0.4).
23. In a constant volume gas thermometer, the pressure of liquid, at a temperature of 27°C, being measured corresponds to 50cm of mercury. If the temperature increases by 20K, find the pressure.
24. If 5g of a solid requires 30cal of heat to change into liquid at the same temperature, calculate the latent heat of fusion in cal/g.
25. What is the expression for heat current? Q is heat, t is time, T is temperature.

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