In the following reaction,$Z$ is known as: $CH \equiv CH \xrightarrow{Z} CH_3CHO$

This conversion can be achieved by:

Which alkyne will give $3$-ethylhexane on catalytic hydrogenation?

Given below are two statements:
Statement $I$: One mole of propyne reacts with excess of sodium to liberate half a mole of $H_2$ gas.
Statement $II$: Four $g$ of propyne reacts with $NaNH_2$ to liberate $NH_3$ gas which occupies $224 \ mL$ at $STP$.
In the light of the above statements,choose the most appropriate answer from the options given below:

Which of the following reacts with acetylene to form the war gas Lewisite?

$CH_3C \equiv C^-Na^+ + (CH_3)_2CH-Cl \to$ What will be the product of this reaction?