Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion-(A): p^Ka of ethyne < p^Ka of propyne.
Reason-(R): Ethyne is less acidic than propyne.
In the light of the above statements, choose the most appropriate answer from the options given below:

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'A' is true and 'R' is false

Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'.

Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'.

A is false, but R is true

answer is D.

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Detailed Solution

A = $H - C \equiv C - H$
B = $C H_{3} - C \equiv C - H$
Acidity A > B
Stability $H - C \equiv C^{Θ} > C H_{3} - C \equiv C^{Θ}$
$p K a B > A$

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