Chemistry - Complete d-block Question with Solution | TestHub

Chromyl chloride (B) is produced when a chloride ion reacts with conc.${\mathrm{H}}_2{\mathrm{SO}}_4$ and ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$.
Passing the chromyl chloride gas through $\mathrm{NaOH}$ turns the solution yellow. This is due to the formation of ${\mathrm{Na}}_2{\mathrm{CrO}}_4$ (C).

The reaction is as follows,

$\mathrm{NaCl} + \mathrm{conc}. {\mathrm{H}}_2{\mathrm{SO}}_4 + {\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7\to \underset{\underset{(\mathrm{Reddish} \mathrm{brown})}{\left(\mathrm{B}\right)}}{{\mathrm{CrO}}_2{\mathrm{Cl}}_2} + {\mathrm{KHSO}}_4 + {\mathrm{NaHSO}}_4 +{\mathrm{H}}_2\mathrm{O}$

${\mathrm{CrO}}_2{\mathrm{Cl}}_2 + \mathrm{NaOH} \to \underset{\underset{\mathrm{Yellow} \mathrm{Colour}}{\left(\mathrm{C}\right)}}{{\mathrm{Na}}_2{\mathrm{CrO}}_4} + \mathrm{NaCl} +{\mathrm{H}}_2\mathrm{O}$