Predict the nature of $P$ in the following reaction:
$CH_3-C\equiv C-CH_3 \xrightarrow[heat]{NaNH_2 / \text{inert solvent}} P$

$But-1-yne$ reacts with cold alkaline $KMnO_4$ to produce:

$A$ mixture of ethane,ethene,and ethyne is passed through ammoniacal $AgNO_3$ solution. The gases which remain unreacted are

Write structures of different isomers corresponding to the $5^{th}$ member of alkyne series. Also write $IUPAC$ names of all the isomers. What type of isomerism is exhibited by different pairs of isomers?

The general formula for an acyclic alkyne is.....

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