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Chapter-11: Thermal Properties of Matter

1. The S. I. unit of heat is –

  • Joule
  • Calorie
  • Kelvin
  • J/kg
Answer
Joule

2. The S. I. unit of temperature is –

  • Joule
  • Fahrenheit
  • Kelvin
  • Calorie
Answer
Kelvin

3. Ideal gas equation –

  • PV=R/T
  • PV=T/R
  • PV=μRT
  • PT=RV
Answer
PV=μRT

4. Value of universal gas constant (R) is –

  • 8.31 J mol⁻¹K⁻¹
  • 8.0 J mol⁻¹K⁻¹
  • 6.67 J mol⁻¹K⁻¹
  • 3.45 J mol⁻¹K⁻¹
Answer
8.31 J mol⁻¹K⁻¹

5. Absolute zero temperature is –

  • 0°C
  • 273.15°C
  • – 273.15°C
  • 100°C
Answer
– 273.15°C

6. Absolute zero temperature on the Fahrenheit scale is-

  • – 32°(3)
  • – 460°
  • -212°
  • -273°
Answer
– 460°

7. The normal temperature of the human body is-

  • 98.6°F or 37°C
  • 212°F or 100°C
  • 104°F or 40°C
  • None of these
Answer
98.6°F or 37°C

8. The S. I. unit of specific heat capacity is-

  • J kg⁻¹k⁻¹
  • J mol⁻¹k⁻¹
  • J kg⁻¹
  • None of these
Answer
J kg⁻¹k⁻¹

9. Coefficient of linear expansion ‘a’ and coefficient of volume expansion “y’ of a solid are related as-

  • Y= 3a
  • Y= 2a
  • A=3y
  • A=y
Answer
  • Y= 3a

10. Coefficient of area expansion (2) and coefficient of linear expansion(1) of material are related as

  • B= 3a
  • 3B = 2y
  • B=2a
  • None of these
Answer
B=2a

11. The temperature which has the same numerical value on Celsius and Fahrenheit scale is-

  • 273°
  • – 40°
  • – 273°
  • 40°
Answer
– 40°

12. The S. I. unit of molar specific heat is-

  • J kg1⁻¹k⁻¹
  • J mol⁻¹k⁻¹
  • J kg⁻¹
  • None of these
Answer
J mol⁻¹k⁻¹

13. The S. I. unit of latent heat is-

  • J kg⁻¹k⁻¹
  • J mol⁻¹-k⁻¹
  • J kg⁻¹
  • None of these
Answer
J kg⁻¹

14. Which of the following instrument is used for measuring heat?

  • Calorimeter
  • Thermometer
  • Hydrometer
  • Barometer
Answer
Calorimeter

15. Cp and Cv are two specific heat capacities of gases

  • Less than 1
  • Greater than 1
  • Equal to 1
  • Same for all gasses
Answer
Greater than 1

16. Which of the following substances has the greatest specific heat capacity- will be-

  • Water
  • Salt
  • Iron
  • Mercury
Answer
Water

17. Molar specific heat capacity of nitrogen gas is-

  • less than that of hydrogen gas
  • greater than that of hydrogen gas
  • same as that of hydrogen gas
  • None of these
Answer
greater than that of hydrogen gas

18. The change of state from solid to liquid is called-

  • melting
  • vaporization
  • fusion
  • None of these
Answer
melting

19. The change of state from liquid to solid is called-

  • melting
  • vaporization
  • regelation
  • fusion
Answer
fusion

20. At the time of melting the temperature of the body-

  • remains constant
  • increases
  • decreases
  • None of these
Answer
remains constant