Which of the following is $NOT$ true for $N_2O$?

Which of the following is a mixed anhydride?

Phosphorus pentoxide $(P_4O_{10})$ is used as a ........ .

When a brown compound of manganese $(A)$ is treated with $HCl$,it gives a gas $(B)$. The gas taken in excess,reacts with $NH_3$ to give an explosive compound $(C)$. Identify compounds $A$,$B$,and $C$.

Which element of group $15$ forms the most basic compound with hydrogen?

Orthophosphorus acid on disproportionation gives $PH_3$ and another oxoacid of phosphorus '$X$'. The basicity of $X$ is