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

Which of the following gases,when passed through a warm dilute solution of $H_2SO_4$ in the presence of $HgSO_4$,gives acetaldehyde?

$Ph-CH=CH-Ph$ $\xrightarrow[CCl_4]{Cl_2} X$ $\xrightarrow{2NaNH_2} Y$ $\xrightarrow[BaSO_4]{H_2+Pd} Z$. Product $Z$ is

The ozonolysis $(O_3, H_2O)$ of $(CH_3)_2CH-C \equiv C-CH_3$ gives:

What is formed when calcium carbide reacts with heavy water?

Which of the following reactions is not correct?