Which of the following compounds does not produce ammonia upon heating?

What are the boiling points of nitrogen and oxygen gases?

Choose the correct statement$(s)$ among the following.
$A$. $SnCl_2 \cdot 2 H_2O$ is a reducing agent.
$B$. $SnO_2$ reacts with $KOH$ to form $K_2[Sn(OH)_6]$.
$C$. $A$ solution of $PbCl_2$ in $HCl$ contains $Pb^{2+}$ and $Cl^{-}$ ions.
$D$. The reaction of $Pb_3O_4$ with hot dilute nitric acid to give $PbO_2$ is a redox reaction.

The oxyacid of phosphorus,in which phosphorus has the lowest oxidation state,is

Nitrous oxide $(N_2O)$ is........

Which of the following oxides of nitrogen is a mixed anhydride of two acids?