Assertion 2-butenal lacks enolisable H-atom, α to carbonyl group, still it has sufficient acidic character. Reason The 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. Reason The conjugate base of 2-butenal is stabilised by resonance. (A) If both Assertion and Reason: are true and the Reason is the correct explanation of the Assertion (B) If both Assertion and Reason: are true but the Reason is not the correct explanation of the Assertion (C) If Assertion is true but Reason is false (D) If 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. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/27cd0281cf1122340a971c79c8fbe986-.png" />

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

If both Assertion and Reason: are true and the Reason is the correct explanation of the Assertion

If both Assertion and Reason: are true but the Reason is not the correct explanation of the Assertion

If Assertion is true but Reason is false

If 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. Reason The conjugate base of 2-butenal is stabilised by resonance.