Assertion 2-butenal lacks enolisable H-atom, α to carbonyl group, still it has sufficient acidic character. ReasonThe conjugate base of 2-butenal is stabilised by resonance.

Question

Assertion 2-butenal lacks enolisable H-atom, α to carbonyl group, still it has sufficient acidic character. ReasonThe conjugate base of 2-butenal is stabilised by resonance. (A) Both Assertion and Reason are true and Reason is the correct explanation of Assertion. (B) Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. (C) Assertion is true but Reason is false (D) Both Assertion and Reason are false.

Tardigrade Admin · Accepted Answer

2-butenal contains &gamma;-H atoms and the conjugate base obtained after the removal of &gamma;- H atom, is stabilised by resonance. Hence, 2-butenal is sufficiently acidic. However, it lacks enolisable H-atom α to carbonyl group.

Q. Assertion $2$ -butenal lacks enolisable H-atom, $α$ to carbonyl group, still it has sufficient acidic character.
ReasonThe conjugate base of $2$ -butenal is stabilised by resonance.

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

Assertion is true but Reason is false

Both Assertion and Reason are false.

$2$ -butenal contains $γ$ -H atoms and the conjugate base obtained after the removal of $γ - H$ atom, is stabilised by resonance. Hence, $2$ -butenal is sufficiently acidic. However, it lacks enolisable H-atom $α$ to carbonyl group.

Q. Assertion 2-butenal lacks enolisable H-atom, α to carbonyl group, still it has sufficient acidic character. ReasonThe conjugate base of 2-butenal is stabilised by resonance.