MCQ practice · SSC Physics Board questions · Chapter 6: Effects of Heat on Matter
In the case of latent heat, which of the following is correct?
- i. the state of the body changes
- ii. the heat of the body stays fixed
- iii. the temperature of the body stays fixed
Think it through first, then pick an option.
- a i and ii
- b i and iii
- c ii and iii
- d i, ii and iii
Answer and explanation
Correct answer: b i and iii
i and iii are true: the state changes and the temperature stays fixed even though heat is given.
Why the other options are wrong
- a i and ii: i is true, but ii is false: the heat of the body does not stay fixed, it takes in heat. iii is true too, so it cannot be left out.
- c ii and iii: ii is false: it is the temperature that stays fixed, not the heat; the body keeps absorbing heat. i is true too.
- d i, ii and iii: ii is false, so not all three hold; the body takes in heat and only its temperature stays fixed.
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