The reaction of silver powder with chloroform produces $....$.

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

The reagent needed for converting $Ph-C \equiv C-Ph$ to trans-stilbene is:

The shortest $C-C$ bond length is present in:

$Ca + C$ $\xrightarrow[\Delta ]{} A$ $\xrightarrow{H_2O} B$ $\xrightarrow{\text{cyclic polymerisation}} C$
Product $B$ and $C$ are respectively

The number of $\sigma$ and $\pi$ bonds present in $pent-4-en-1-yne$ is