The good reducing nature of $H_3PO_2$ is attributed to the presence of:

Which of the following oxides of nitrogen is solid in nature at room temperature?

The bond energies (in $kJ \ mol^{-1}$) of $P-H$,$As-H$,and $N-H$ are respectively:

The correct sequence of decrease in the bond angle of the following hydrides is

White phosphorus is heated with concentrated $NaOH$ in $CO_2$ atmosphere to form a gas $A$ and compound $B$. When $A$ is bubbled into aqueous $CuSO_4$ solution,copper phosphide and $C$ are formed. $B$ and $C$ are respectively:

Superphosphate is the mixture of