Chemistry - Redox Reactions Question with Solution | TestHub

(A) ${\mathrm{BaCl}}_2+{\mathrm{Na}}_2{\mathrm{CrO}}_4\stackrel{{\mathrm{CH}}_3\mathrm{COOH}}{\to }{\mathrm{Na}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ (preparation of dichromate)

(B) ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7+\mathrm{NaOH}\to {\mathrm{K}}_2{\mathrm{CrO}}_4$

$${\mathrm{CrO}}_4^{2-}\underset{{\mathrm{OH}}^{-}}{\stackrel{{\mathrm{H}}^{+}}{\rightleftharpoons }}{\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}$$

(C) ${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}+{\mathrm{NO}}_3^{-}\stackrel{{\mathrm{H}}^{+}}{\to }$no reaction.

(D) ${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}+{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}\stackrel{{\mathrm{H}}^{+}}{\to }{\mathrm{CH}}_3-\mathrm{COOH}+{\mathrm{Cr}}^{+3}$