Q1. Which of the following processes involves the transfer of heat through the movement of fluids? (2021)
Solution:
Convection involves the transfer of heat through the movement of fluids.
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Q2. Which law states that the rate of heat transfer through a material is proportional to the temperature difference? (2022)
Solution:
Fourier's Law states that the rate of heat transfer through a material is proportional to the temperature difference across it.
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Q3. What is the principle behind a thermos flask? (2022)
Solution:
The principle behind a thermos flask is insulation, which minimizes heat transfer.
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Q4. What is the term for the temperature at which a substance changes from liquid to gas? (2023)
Solution:
The temperature at which a substance changes from liquid to gas is called the boiling point.
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Q5. Which law states that the heat absorbed or released by a substance is proportional to the change in temperature? (2021)
Solution:
Calorimetry states that the heat absorbed or released by a substance is proportional to the change in temperature.
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Q6. In which process does a substance change from solid to gas? (2022)
Solution:
The process in which a substance changes from solid to gas is called sublimation.
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Q7. What is the formula for calculating the heat transfer in a substance? (2023)
Solution:
The formula for calculating the heat transfer in a substance is Q = mcΔT, where Q is the heat added, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.
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Q8. What is the process of heat transfer through a fluid due to density differences called? (2023)
Solution:
The process of heat transfer through a fluid due to density differences is called convection.
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Q9. What is the specific heat capacity of iron? (2023)
Solution:
The specific heat capacity of iron is approximately 0.45 J/g·K.
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Q10. Which of the following is an example of an insulator? (2019)
