Assertion :Entropy of ice is less than water. Reason: Ice has cage like structure.

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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Assertion is incorrect but Reason is correct.

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
Entropy is defined as the extent of randomness (in a system, when a substance is heated, its randomness and hence entropy increases).

Thus entropy of ice is less than water because of lesser molecular motion in ice.

Thus, the Assertion is correct.

It is also true that ice has an open cage-like structure.

So, the reason is also correct but not the correct explanation for Assertion.

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Q. Assertion
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Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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Reason (R) Order is determined experimentally and molecularity is the sum of the stoichimetric coeffcient of rate determining elementary step.

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