Question : Air________on heating and________on cooling.
Option 1: expands, contracts
Option 2: contracts, stabilises
Option 3: expands, expands
Option 4: contracts, expands
Correct Answer: expands, contracts
Solution : The correct answer is expands, contracts.
Air expands on heating and contracts on cooling. When we heat the air the distance between the molecules increases, and that's why it expands, but when we cool the air the distance between the molecules decreases and hence it contracts.
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