$CaC_2$ reacts with $H_2O$ to produce ...... .

Which reaction converts $2$-hexyne into $trans$-$2$-hexene?

For the alkyne with formula $C_6H_{10}$,the number of alkynes with acidic hydrogens is $x$ and the number of alkynes with no acidic hydrogens is $y$. $x$ and $y$ are respectively:

The number of possible structural alkynes with molecular formula $C_5H_8$ is

The general formula of an alkyne is:

Ethene can be separated from acetylene by passing the mixture through :