Acidic following compound |GeneralOrganiChemistryJEEMAIN2023

JEE MAIN 2023

13-4-23 S2

Question

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Order of acidic nature of the following compounds is A> B > C.
Reason R: Fluoro is a stronger electron withdrawing group than Chloro group.
In the light of the above statements, choose the correct answer from the options given below:

Select the correct option:

A is false but R is true.

Both A and R are correct and R is the correct explanation of A.

Both A and R are correct but R is NOT the correct explanation of A.

A is true but R is false

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Sol. Acidic strength $\alpha-$ I effect $$ \alpha \frac{1}{+1} \text { effect } $$ F, Cl exerts -I effect, Methyl exerts +1 effect, C is least acidic. Among $A$ and $B$; since inductive effect is distance dependent, Extent of $-I$ effect is higher in $A$ followed by $B$ even though $F$ is stronger electron withdrawing group than $C l$. Thus, $A$ is more acidic than $B$.

Question Tags

JEE Main

Chemistry

Easy

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