Question

Alkynes cannot be prepared from
A) Other alkynes
B) Ketones
C) Alcohols
D) Aldehydes​

Answer 1

Answer:

Aldehydes

Only the aldehydes, ketones, and few other alkynes can give rise to a new alkyne compound. ... Explanation: The cycloaddition of the alkynes leads to the oxidative cleavage among them and hence it results in the formation of carboxylic acids.

Answer 2

Often, alkynes are obtained from the acetylene through the condensation process and sometimes by dehydrohalogenation. Explanation: Only the aldehydes, ketones, and few other alkynes can give rise to a new alkyne compound.