Thermal Properties of Matter Mock Test – Class 11 Physics

1. A calorimeter has heat capacity . Taking , its water equivalent is:

2. A material has coefficient of volume expansion . If it is isotropic and the temperature change is small, its coefficient of linear expansion is approximately:

3. A colder steel cup and warmer water are brought into contact. Before they reach the same thermal condition, the natural heat transfer is expected to be:

4. A metal cube has density at . It is heated through , and . What is its approximate new density?

5. Rivets are often heated before being used to fasten metal plates. After cooling, the joint becomes tight mainly because the rivet:

6. A block of ice at is added to water at in an insulated vessel. Use , , and . What is the final temperature?

7. A metal block at is kept in contact with another block at . Before they reach the same temperature, the direction of natural heat flow is:

8. A slab of thickness , area , and thermal conductivity has its two faces maintained at and . What is the steady rate of heat flow?

9. A graph of volume against absolute temperature for a fixed mass of gas at constant pressure is a straight line through the origin. What does this graph show?

10. A brass rod and an iron rod have equal lengths at . Brass has a larger coefficient of linear expansion than iron. After both rods are heated through the same temperature rise, the difference in their lengths is:

11. A thermometer is in thermal equilibrium with object . The same thermometer is also in thermal equilibrium with object . The conclusion that and have the same temperature relies most directly on:

12. A claim says, “Doubling the thickness of a wall doubles the rate of heat conduction through it.” The correct evaluation is:

13. Radiation differs from conduction and convection because radiation:

14. A temperature rise of is equal to a temperature rise of:

15. Assertion: Heating a substance may increase its internal energy.
Reason: Heat supplied to a body can change random molecular motion or molecular arrangement depending on the process.

16. Water has maximum density at:

17. A slab has one face at and the other at . Its thickness is , and the steady temperature variation is linear. What is the temperature at a point from the hot face?

18. A metal ball at is placed in a chamber maintained at . The Newton-law form that best describes the initial trend is:

19. In a calorimetry experiment, of water at is mixed with of water at . If heat loss and calorimeter heat capacity are neglected, what is the final temperature?

20. In a thermal equilibrium experiment, a hot body and a cold body are placed in contact inside an insulated container. The final temperature is expected to be:

21. A fixed mass of gas has volume at . At constant pressure, its volume becomes . What is the final temperature?

22. A coastal region usually has smaller temperature variation than a dry inland region partly because water has:

23. Two objects are at the same temperature, but one has much larger mass. What can be concluded from this information alone?

24. A mercury thermometer shows temperature by the rise of mercury in a glass tube. The observed rise is not simply the real expansion of mercury because:

25. A liquid thermometer is made with a very wide capillary tube instead of a narrow one. For the same volume expansion of liquid, what happens to the movement of the liquid column?

26. A metal ring is heated uniformly. Ignoring any change of state, what happens to the outer diameter of the ring and the diameter of its hole?

27. Study the table and identify the row that gives a suitable use of thermal expansion.

28. A body cools from to in in surroundings at . Using the average-temperature form of Newton’s law, the cooling constant in is closest to:

29. A pendulum clock has a metallic pendulum. On a hot day, the pendulum rod becomes slightly longer. What happens to the time period of the pendulum qualitatively?

30. In a constant-volume gas thermometer, the pressure of the gas is used as the thermometric property. Why must the volume be kept constant?

31. A body cools in a room at . At one instant its temperature is , and later it is . According to Newton’s law of cooling, the cooling rate is larger at:

32. Read the case and answer the question.

How does the volume of water change during this heating?

33. A ring made of metal is heated and then slipped onto a shaft. After cooling, it grips the shaft tightly. The sequence of size changes is:

34. Two samples of the same liquid are mixed in an insulated vessel. One has mass at temperature , and the other has mass at temperature . If no heat is lost and both samples have the same specific heat capacity, the final temperature is:

35. Warm air rising above a heater is an example of:

36. The study of thermal properties of matter mainly deals with how matter behaves when there is a change in heat or temperature. What is the most suitable description of this part of physics?

37. A student touches a metal chair and a wooden chair in the same room and feels the metal as colder. If both have been in the room for a long time, the better thermal conclusion is:

38. A substance has . What heat is needed to raise the temperature of of this substance by , with no phase change?

39. A thermometer records two temperatures, and . The difference between these two temperatures is:

40. A shiny silvered surface is used in a thermos flask mainly to reduce:

41. A student compares radiation from bodies at and by using the ratio . The comparison is wrong because:

42. The net radiation from a body becomes zero when:

43. A shallow dish contains of water at . Due to evaporation, of water leaves the surface. Assume the latent heat needed for evaporation is taken only from the remaining water, , and . What is the approximate final temperature of the remaining water?

44. In a heating experiment, the same amount of heat is supplied separately to equal masses of copper and water. Their temperature rises are not equal. This mainly shows that:

45. A perfect black body is best described as a body that:

46. A heating problem compares two formula uses: and . The safest decision rule is:

47. A body of specific heat capacity is heated by . The heat supplied, if there is no phase change, is:

48. A thermometer can measure temperature because some physical property of its material changes in a regular way with temperature. Such a property is called:

49. If radiant energy from a point-like source spreads uniformly in all directions, the intensity at distance varies as:

50. A black body of area is at in surroundings at . Taking , what is its approximate net rate of radiative heat loss?