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Assertion For the reaction \( R C l+N a O H(a q) \rightarrow \) ROH \( + \) Na \( C l \), the rate of reaction is reduced to half on reducing the concentration of RCl to half. Reason The rate of the reaction is represented by k[RCl], i.e., it is a first order reaction.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect but Reason is correct

Correct answer: Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Solution

If the rate is proportional to [RCl], then reducing [RCl] by half reduces the rate by half. That makes both statements true, and the reason directly explains the assertion.

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