Question

The oxidation state of chrominium in the final product formed in the reaction between `KI` and acidified potassium dichromate soluttion is
A. ` +4`
B. ` +6`
C. ` +2`
D. ` +3`

Answer 1

Correct Answer - D
Always remenber that acidified potassium bechromate is always reduced to ` Cr^(3+)` ions :
` Cr_2O_7^(2-) + 14H^(+) + 6I^(-) rarr 2Cr^(3+) + 7H_2O + 3I_2`
The oxidation state fo chromun in ` Cr^(3+) ` ion is ` +3`.