Phosphine is produced by adding water to

The important method for the fixation of nitrogen is

In the following reaction,identify the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T.$:
$\underline{P}Cl_5 + H_2O \longrightarrow H_3PO_4 + HCl$

In pyrophosphorous acid,the number of $P-OH$,$P-H$,and $P=O$ linkages are respectively:

Which of the following compounds is the most explosive?

On passing a gas,$X$,through Nessler's reagent,a brown precipitate is obtained. The gas $X$ is