Thermal Properties of Matter Mock Test – Class 11 Physics

1. A cube of isotropic material has each edge increasing by on heating. The approximate percentage increase in its volume is:

2. A heating curve for a pure substance shows a horizontal segment at its melting point. What does this horizontal segment represent?

3. The SI unit of heat capacity is:

4. Study the table and identify the row that correctly describes linear expansion.

5. Two solid bodies of the same material are heated through the same temperature rise. Body has twice the original volume of body . The ratio of their volume increases is:

6. A graph is described with temperature on the vertical axis and time on the horizontal axis while a body is heated steadily. What does a rising part of the graph most simply suggest?

7. Two equal masses of water and copper receive the same amount of heat, and neither changes state. Water has a much larger specific heat capacity than copper. The temperature rise of water will be:

8. A composite slab has two layers in series, each of area . Layer , on the side, has thickness and . Layer , on the side, has thickness and . What is the steady-state temperature at the interface?

9. A sample of solid carbon dioxide at its sublimation temperature changes directly into gas at the same temperature. The latent heat of sublimation is . The gas is then warmed by , and its specific heat capacity is . What is the total heat required?

10. A pan has a metal base and a plastic handle. The plastic handle is used mainly because plastic:

11. The SI unit of specific latent heat is:

12. Study the table and identify the row that correctly distinguishes and .

13. A thermos flask is filled with hot liquid and closed. After a long time, the liquid cools slightly. This does not violate the design aim because:

14. A laboratory note uses , , and in a heating observation. What is the best interpretation of these symbols?

15. A calorimeter of heat capacity contains of water at . A hot metal piece loses of heat to the water and calorimeter. Taking , what is the final temperature?

16. During melting of a pure solid at its melting point, the temperature remains constant even though heat is supplied. The supplied heat is mainly used to:

17. A piece of ice at is melted completely. If , the heat absorbed by the ice is:

18. For steady heat conduction through a plane slab, the rate of heat flow is given by:

19. A wall has two heat-loss paths in parallel: a brick part and a glass window. The brick part has thermal resistance , and the glass window has thermal resistance . If the indoor-outdoor temperature difference is , what is the total heat current?

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

21. 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:

22. A liquid is heated in a container. Its apparent expansion is , while the container’s volume expansion is . The real expansion of the liquid is:

23. For the same substance, two samples of masses and are heated through the same temperature rise. The ratio of heat required by the first sample to the second sample is:

24. Thermal expansion of a solid depends on material, original size, and temperature change. The factor that represents the nature of the material in linear expansion is:

25. A body cools from to in , and later from to in . The surrounding temperature is . Using the average-temperature form of Newton’s law of cooling, is closest to:

26. 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?

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

28. If the area of a radiating body is doubled while its emissivity and absolute temperature remain the same, its emitted power becomes:

29. A body is losing heat by radiation to surroundings. The surrounding temperature is not negligible. The net radiation formula uses instead of only because:

30. Study the table and identify the row that correctly connects the process with the heat relation.

31. In the conduction relation , the sign of indicates:

32. The melting point of ice is lowered by about for each atmosphere increase of pressure. A piece of ice is at . Approximately how much extra pressure is needed to lower its melting point to this temperature?

33. A composite wall is made of two layers in series. Layer and layer have the same area and the same thickness, but . In steady state, what is true about the heat current through the two layers?

34. Consider the following statements about internal energy.
Statement I: Internal energy is connected with microscopic molecular motion and interactions.
Statement II: A body can have internal energy even when it is not moving as a whole.
Statement III: Internal energy and temperature are always numerically equal.

35. The zeroth law is essential for temperature measurement because it allows us to:

36. A body is in thermal equilibrium with body . Body is not in thermal equilibrium with body . What conclusion is most reasonable?

37. Most solids expand on heating because heating usually causes:

38. A metal rod is fixed rigidly between two supports so that it cannot expand. When its temperature is increased, large stress may develop because:

39. Woollen clothes help keep a person warm mainly because wool:

40. Two samples of water are at . Sample has mass , and sample has mass . What is the best conclusion?

41. Ice floats on water mainly because:

42. Heat transfer from one place to another can occur by conduction, convection, or radiation. The method that can occur even through vacuum is:

43. A hot cup of tea is kept on a table in a cooler room. The heat transfer mainly occurs because the tea and the surroundings have different values of which quantity?

44. A wall consists of insulation and brick in series. In steady state, the insulation has a larger temperature drop than the brick. The best conclusion is:

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

46. Water vapour at deposits directly into ice at . For water, take at and . How much heat is released when of vapour deposits into ice at ?

47. A real surface with emissivity has area and temperature . Compared with a black body of the same area and temperature, its emitted power is:

48. A sample of a liquid requires of heat to raise its temperature by . What is its specific heat capacity?

49. A substance is heated by a heater. Its temperature rises from to in . If of the heater energy is absorbed by the substance, what is its specific heat capacity?

50. Use the arrangement described below. A metal ball just passes through a metal ring at room temperature. The ball is heated strongly, while the ring is kept at room temperature. What is most likely to happen when the heated ball is tried again?