1. In solids, the particles can only
Answer: D. vibrate about their mean positions
Physics Class 10 Unit 11: Thermal Expansion and Change of State MCQs
67 multiple choice questions with the correct answer for each. Tap an option to check yourself, or switch on "Show all answers". This is page 1 of 2.
Tap an option to check your answer.
2. When a solid absorbs heat, the amplitude of vibration of its particles
Answer: A. increases
3. Liquid particles
Answer: B. keep changing their positions and can flow
4. Gas particles exert pressure by
Answer: C. colliding with the walls of the container
5. Melting is the change of a
Answer: C. solid into a liquid
6. The boiling point of water at standard atmospheric pressure is
Answer: B. 100 °C
7. Condensation is the change of a
Answer: A. gas into a liquid
8. Water droplets forming on the outside of a cold bottle are an example of
Answer: D. condensation
9. Sublimation is the change of a
Answer: A. solid directly into a gas
10. A common example of sublimation is
Answer: B. dry ice changing into carbon dioxide gas
11. Deposition is the change of a
Answer: C. gas directly into a solid
12. Formation of frost on leaves is an example of
Answer: D. deposition
13. Which process involves a change from gas to solid without passing through the liquid phase?
Answer: B. Deposition
14. Thermal expansion means
Answer: D. increase in size of matter on heating
15. For the same increase in temperature, the expansion is least in
Answer: A. solids
16. For the same increase in temperature, the expansion is most in
Answer: C. gases
17. The change in length of a solid on heating is called
Answer: A. linear thermal expansion
18. The formula for linear thermal expansion is
Answer: B. ΔL = αL₀ΔT
19. The coefficient of linear thermal expansion is the
Answer: C. fractional change in length per kelvin change in temperature
20. The SI unit of the coefficient of linear expansion is
Answer: D. K-1
21. The change in volume of a solid on heating is called
Answer: B. volumetric thermal expansion
22. The formula for volumetric thermal expansion is
Answer: A. ΔV = βV₀ΔT
23. The relation between the coefficients of linear and volume expansion of solids is
Answer: C. β = 3α
24. A steel bridge 1500 m long (α = 1.2×10-5 K-1) undergoes a temperature change of 15 °C. Its change in length is
Answer: D. 0.27 m
25. A steel bar of length 1.5 m is heated from 10 °C to 100 °C (α = 1.2×10-5 K-1). The increase in length is
Answer: B. 1.62 mm
26. A solid cube of side 10 cm with α = 9×10-6 K-1 is heated by 100 °C. The increase in its volume is
Answer: D. 2.7 cm³
27. A hot air balloon fabric of volume 500 m³ with β = 3.5×10-5 K-1 is heated by 60 °C. The volume increases by
Answer: A. 1.05 m³
28. When heat is applied directly to a liquid, the increase in its volume is called
Answer: C. real volume expansion
29. Expansion of a liquid observed without considering the expansion of its container is called
Answer: A. apparent expansion
30. When a liquid in a flask is heated, its level first
Answer: B. falls and then rises
31. Real expansion of a liquid equals
Answer: C. apparent expansion + expansion of the container
32. The relation between the coefficients of real and apparent expansion of a liquid is
Answer: D. γr = γa + γg
33. A flask contains 250 ml of glycerine at 20 °C (γ = 500×10-6 K-1). When heated to 70 °C, the volume increases by
Answer: C. 6.25 ml
34. All liquids expand on heating except water, which between 4 °C and 0 °C
Answer: B. expands on cooling
35. Water has its highest density at
Answer: A. 4 °C
36. The anomalous expansion of water allows ice to
Answer: D. float on water
37. A bimetallic strip consists of
Answer: D. two thin strips of different metals joined together
38. A bimetallic strip bends on heating because
Answer: A. one metal expands more than the other
39. In an electric iron, a bimetallic thermostat controls the temperature of the
Answer: C. heating coil
40. Expansion joints are used in bridges to
Answer: B. accommodate expansion and contraction
41. Evaporation is the change of a liquid into vapours at
Answer: B. any temperature
42. Evaporation causes cooling because the molecules left behind have
Answer: A. lower average kinetic energy
43. Sweating cools the body because of
Answer: D. evaporation of sweat
44. Which factor decreases the rate of evaporation?
Answer: C. Increase in humidity
45. Which factor increases the rate of evaporation?
Answer: D. Increase in wind speed
46. Boiling occurs
Answer: C. throughout the liquid at the boiling point
47. In a refrigerator, cooling is produced by the evaporation of
Answer: B. the refrigerant
48. CFCs were banned as refrigerants because they
Answer: A. deplete the ozone layer
49. Latent heat is the heat absorbed or released during a change of state without a change in
Answer: A. temperature
50. The heat required to change a solid into a liquid at its melting point is called latent heat of
Answer: C. fusion
About Physics Class 10 Unit 11 MCQs (Federal Board)
These 67 Physics MCQs cover Class 10 Unit 11: Thermal Expansion and Change of State of the Federal Board (FBISE) SSC-II (Class 10) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. The questions are split over 2 pages of 50. You can also read the Thermal Expansion and Change of State notes for this chapter. Download the Thermal Expansion and Change of State MCQs as a PDF using the button at the top of this page.