Assertion :In free expansion of an ideal gas, the entropy increases. Reason: Entropy increases in all natural processes.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
In free expansion of an ideal gas, work done comes from internal energy of the gas and since randomness increases or Gibbs free energy increases so we can say entropy increases.
Crystallization. Evaporation, which cools the remaining liquid are processes in which entropy decreases.
Hence, Second statement is wrong.

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Choose the correct option.

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