The oxoacid of phosphorus that is easily obtained from a reaction of alkali and white phosphorus and has two $P-H$ bonds,is

Which of the following oxides of nitrogen does not contain an $N-N$ bond?

How can you synthesise nitric oxide in the laboratory?

Why is $N_2$ less reactive at room temperature?

Which of the following is used in the industrial production of nitric acid by the Ostwald process?

Regarding the hydrides of group $15$ elements $EH_{3}$ $(E = N, P, As, Sb, Bi)$, select the correct statement from the following:
$A$. The stability of hydrides decreases down the group.
$B$. The basicity of hydrides decreases down the group.
$C$. The reducing character increases down the group.
$D$. The boiling point increases down the group.
Choose the correct answer from the options given below: