$Mg_2C_3 + H_2O \xrightarrow{X}$ (organic compound).
Compound $X$ is

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

$CH_3-C \equiv C-CH_3 \, \xrightarrow[{(2) Br_2}]{{(1) H_2 /Pd/CaCO_3}} \, (X) \, , \, (X)$ is

The final product of the following reaction is .......
$CaO + 3C$ $\xrightarrow{\text{Heat}} A$ $\xrightarrow{H_2O} B$ $\xrightarrow{H_2SO_4, Hg^{2+}} C$

In the reaction $CaC_2 + H_2O \to A \xrightarrow{H_2SO_4/HgSO_4} B$,what are $A$ and $B$?

The product formed in the above reaction is