The product formed in the reaction of $SOCl_2$ with white phosphorus is:

Which reaction$(s)$ among the following produce dinitrogen?
$1. NH_4Cl(aq) + NaNO_2(aq) \longrightarrow$
$2. NH_2CONH_2 + 2H_2O \longrightarrow$
$3. Ba(N_3)_2 \longrightarrow$
$4. NH_4Cl + Ca(OH)_2 \longrightarrow$

Nitrogen shows different oxidation states in the range of:

Identify the compound in which phosphorus exists in the oxidation state of $+1$.

The statement that is $NOT$ correct is:

The treatment of galena $(PbS)$ with $HNO_3$ produces a gas that is: