AIIMS2018Chemistry-Organic Chemistry

AIIMS 2018 Chemistry Acidic and Basic Strength MCQ Question

Type: MCQ-conceptual-Medium-Class 11

The reactions A and B are given with same temperature and same concentration but rate of reaction A is double than B. If pre-exponential factor is same for both reactions then difference in activation energy EAEBE_A - E_B is?

A

RTln2-RT \ln 2

B

RTln2RT \ln 2

C

2RT2RT

D

RT2\frac{RT}{2}

Correct Answer

Option A

Detailed Explanation

The acidic strength of a compound is influenced by the –I (inductive) effect, where electron-withdrawing groups stabilize the negative charge on the conjugate base, enhancing acidity. A stronger –I effect leads to greater stabilization of the conjugate base, resulting in higher acidic strength. Since the question indicates that the correct order of acidic strength corresponds to the –I effect, option A must reflect the strongest acids, while the other options, being marked as N/A, do not provide relevant information or comparisons regarding acidic strength. Understanding the relationship between the –I effect and acidity is crucial for predicting the behavior of acids in various chemical contexts.

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