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Potassium dichromate acts as a strong ox...

Potassium dichromate acts as a strong oxidising agent in the acidic medium. When heated with a metal chloride and conc. sulphuric acid, it gives orange red fumes. On passing these fumes through sodium hydroxide, it gives a yellow solution (X) and this acidified solution gives yellow precipitate (Y) with lead acetate. On heating potassium dichromate with KOH, it forms a yellow solution (Z) which on acidification changes to orange colour. Acidified solution of dichromate ion gives deep blue colour with `H_2O_2` due to the formation of (P)
The oxidation state of Cr in compound P

A

`+10`

B

`+8`

C

`+6`

D

`+5`

Text Solution

Verified by Experts

The correct Answer is:
C
`CrO_5` is formed in which the oxidation state of cr is +6 .
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