When iodoform is heated with $Ag$ powder,the product formed is:

The number of $\sigma$ and $\pi$ bonds between two carbon atoms in calcium carbide are

What is the product when $2-$butyne is treated with liquid $NH_3$ in the presence of lithium?

What product is obtained by the oxymercuration of $1$-butyne using $HgSO_4 + H_2SO_4$?

Which of the following compounds forms a $Na$-salt upon reaction with $NaNH_2$?

$A$ mixture of methane,ethylene,and acetylene gases is passed through a Wolf's bottle containing ammoniacal cuprous chloride. The gas coming out is