Question

Assertion : HC ≡ C is more stable than H₂C = CH.

Reason : HC ≡C^- has more s-character than H₂C = CH^-

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

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (a) Both A and R are true and R is the correct explanation of A

Explanation:

HC ≡ C^-   has 50% s-character and H₂C = CH^- has 33% s-character. Stability of carbanions increases with an increase in the s-character at the carbanion. So HC ≡ C^- is more stable than H₂C = CH^- .