Chemistry - Complete d-block Question with Solution | TestHub

Acidic dichromate solutions on treatment with ${\mathrm{H}}_2{\mathrm{O}}_2$ gives deep blue $\mathrm{CrO}{\left({\mathrm{O}}_2\right)}_2$ in presence of ether layer

A deep red liquid, ${\mathrm{CrO}}_2{\mathrm{Cl}}_2$ is formed by the reaction of chromium(III) oxide with HCl in presence of conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$.

${\left({\mathrm{NH}}_4\right)}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ on heating yields green chromium(III) oxide and nitrogen gas.

${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ on heating with charcoal produces ${\mathrm{K}}_2{\mathrm{CO}}_3$.