Acetylene shows ........... in its reaction with silver nitrate.

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

If acetylene is passed through an electric arc in the atmosphere of nitrogen,the compound formed is

The reaction of acetylene with acetic acid in the presence of $Hg^{2+}$ at room temperature yields ....

$CH_3-C(Br)_2-C(Br)_2-CH_3$ $\xrightarrow{x NaNH_2}$ $\xrightarrow{y CH_3I} CH_3-C \equiv C-C \equiv C-CH_3$
$x$ and $y$ moles are consumed. The value of $x + y$ is:

$CH_3-CH(CH_3)-C \equiv CH \xrightarrow{excess \ HBr}$
The product of the above reaction is