Question

Which of the following reaction is shown by alkynes?

Options

• Addition

• Substitution

• Polymerization

• All of these

Answer 1

All of these

Explanation:

Addition –

\[\ce{CH ≡ CH + 3H2 ->[Ni] CH3 - CH3}\]

Substitution –

\[\ce{CH ≡ CH + Na -> CH = C^{-} Na^{+} + 1/2 H2}\]

Polymerization – 

\[\ce{3CH ≡ CH ->[hot Cu tube][Polymerization] \underset{Benzene}{C6H6}}\]