Statement I : Ethyne is more acidic than propyne.
Statement II : 1-butyne is more acidic than propyne.

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Statements I and II are incorrect

Statements I and II are correct

Statement I is incorrect and statement II is correct

Statement I is correct and statement II is incorrect

answer is B.

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Detailed Solution

Acidity tends reduces as alkyl group increases because this group shows +I effect which reduces the acidic character on alkyne.

$CH \equiv CH > {CH}_{3} - C \equiv CH > {CH}_{3} - {CH}_{2} - C \equiv CH$

hence, ethyne is more acidic than propyne and propyne is more acidic than butyne.

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