Question

When KOH solution is added to potassium dichromate solution the colour of solution
changes to yellow, because_
(A) chromate ion changes to dichromate ion
(B) dichromate ion changes to chromate ion
(C) oxidation number of chromium changes from + 6 to +4
(D) oxidation number of chromium changes from + 4 to +6
:la.​

Answer 1

Answer:

the answer is

c ............