Chemistry - Redox Reactions Question with Solution | TestHub

A light pink hydrated salt $(\mathrm{X})$ when treated with $\mathrm{BaC}{\ell }_2$ solution produces white precipitate which is insoluble in hydrochloric acid. When ( X ) (aq.) is treated with NaOH (aq.) in the presence of air, brown precipitate ( Y ) is formed which is disolve in ${\mathrm{H}}_2{\mathrm{O}}_2/{\mathrm{H}}_2{\mathrm{SO}}_4$ and produces solution of (X) (aq.)

select the CORRECT statement(s) regarding the dark coloured compound (Z) which is formed on reaction of (X) (aq.) with sodium peroxodisulphate.