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

What is the product formed by the hydration of propyne in the presence of $H_2SO_4$ and $HgSO_4$?

$CaC_2 + 2D_2O \longrightarrow$ "$P$" $+ Ca(OD)_2$
In the above reaction,the product "$P$" is:

When $Mg_2C_3$ is reacted with water,a compound $X$ is formed which on heating with $Na$ followed by treatment with $C_2H_5Br$ gives another compound $Y$. Calculate the number of sigma bonds in $Y$.

In the reaction,$CH_3-C \equiv C-CH_3 \xrightarrow{(i) X, (ii) Zn/H_2O} CH_3-C(=O)-C(=O)-CH_3$,$X$ is:

The product$(s)$ obtained via oxymercuration $(HgSO_4 + H_2SO_4)$ of $but-1-yne$ would be