Question

A compound is treated with $NaNH_2$ to give sodium salt. Identify the compound.

• A. $C_2 H_2$
• B. $C_6 H_6$
• C. $C_2 H_6$
• D. $C_2 H_4$

Answer 1

Answer: (A)

$C_2 H_2$

Answer 2

Sodamide is strong base, attract the more acidic hydrogen and gives sodium salt
$H-C \equiv C -H + NaNH_2 \longrightarrow H-C\equiv C^- Na^+$
\hspace60mm _{}^{Sodium\, ethynide}
\hspace80mm +\frac{1}{2}H_2