CrO42- (yellow) changes to Cr2O72- (orange) in pH =x and vice versa in pH=y. Hence, x and y are:

(a) 6,8

(b) 6,5

(c) 8,6

(d) 7,7

Concept Videos :-

#7 | Reactions of KMNO4 & K2Cr2O7: I
#8 | Reactions of KMNO4 & K2Cr2O7: II

Concept Questions :-

Chemistry of KMnO4, K2Cr2O7 & CrO5 and others
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