The colour of changes from red-orange to lemon-yellow on treatment with because of:
CHEMISTRY · Single correct · CBSE · Chemistry · d- and f-Block Elements · d- and f-Block Elements
Problem
The colour of K2Cr2O7 changes from red-orange to lemon-yellow on treatment with KOH(aq.) because of:
(1) Reduction of Cr (VI) to Cr (III)
(2) Formation of chromium hydroxide
(3) Conversion of dichromate into chromate ion
(4) Oxidation of potassium hydroxide to potassium peroxide