Statement 1: Among 15th group hydrides, reducing character decreases from ${\mathrm{NH}}_3$ to ${\mathrm{BiH}}_3$.

Statement 2: ${\mathrm{E}}_2{\mathrm{O}}_3$ and ${\mathrm{E}}_2{\mathrm{O}}_5$ are always basic (Where $\mathrm{E}$ is group 15 element)

${\mathrm{PCl}}_5+{\mathrm{H}}_2\mathrm{O}\to \mathrm{A}+\mathrm{HCl}$

$\mathrm{A}+{\mathrm{H}}_2\mathrm{O}\to \mathrm{B}+\mathrm{HCl}$

Find number of ionisable hydrogen in $\mathrm{B}$

Identify $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ in the following reaction. (Equation not balanced)

$\mathrm{Cl}\stackrel{\bullet }{\mathrm{O}}+{\mathrm{NO}}_2\to \underset{¯}{\mathrm{X}}\stackrel{{\mathrm{H}}_2\mathrm{O}}{⟶}\underset{¯}{\mathrm{Y}}+\underset{¯}{\mathrm{Z}}$

Formation of photochemical smog involves the following reaction in which $\mathrm{A},\mathrm{B}$ and $\mathrm{C}$ are respectively.

(i) ${\mathrm{NO}}_2\stackrel{\mathrm{hu}}{⟶}\mathrm{A}+\mathrm{B}$

(ii) $\mathrm{B}+{\mathrm{O}}_2\to \mathrm{C}$

(iii) $\mathrm{A}+\mathrm{C}\to {\mathrm{NO}}_2+{\mathrm{O}}_2$

Choose the correct answer from the options given below:

Match List I with List II

Choose the correct answer from the options given below :