Class 12 Chemistry The d- and f-Block Elements Compounds of Transitional elements

Easy

The colour of $K_2Cr_2O_7$ changes from red-orange to lemon-yellow on treatment with aqueous $KOH$ because of:

A
The reduction of $Cr^{VI}$ to $Cr^{III}$
B
The formation of chromium hydroxide
C
The conversion of dichromate to chromate
D
The oxidation of potassium hydroxide to potassium peroxide

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Class 12 Questions

Class 12

Chemistry Questions

Chapter

The d- and f-Block Elements

Subtopic

Compounds of Transitional elements

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