Assertion A: Acetal/Ketal is stable in basic medium.

Question

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Acetal/Ketal is stable in basic medium.

Reason R: The high leaving tendency of alkoxide ion gives the stability to acetal/ketal in basic medium.

In the light of the above statements, choose the correct answer from the options given below:

(1) A is true but R is false

(2) A is false but R is true

(3) Both A and R are true and R is the correct explanation of A

(4) Both A and R are true but R is NOT the correct explanation of A

Answer 1

(1) A is true but R is false

For Assertion: Acetal and ketals are basically ethers hence they must be stable in basic medium but should break down in acidic medium. Hence assertion is correct.

For reason: Alkoxide ion (RO^–) is not considered a good leaving group hence reason must be false.