NEET Physics Entropy MCQ Question
Which of the following combinations regarding entropy in chemical reactions is correct?
Entropy can increase or decrease based on molecular order during phase changes; it is always positive for melting.
Entropy change does not affect spontaneity; Gibbs energy solely determines reaction direction.
Irreversible processes always lead to an increase in total entropy, while reversible processes can have zero entropy change.
Raising the temperature of a crystalline solid from absolute zero increases entropy because molecular motion begins.
Correct Answer
Detailed Explanation
Option A is correct because entropy changes during phase transitions can lead to both increases and decreases in order, and phase changes like melting have positive entropy changes. The other statements contain misconceptions about entropy and spontaneity.
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