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Cr(2)O(7)^(2-)overset(pH=x)rarrCrO(4)^(2...

`Cr_(2)O_(7)^(2-)overset(pH=x)rarrCrO_(4)^(2-)overset(pH=y)rarrCr_(2)O_(7)^(2-)`
x and y can be :

A

4 and 5

B

4 and 8

C

8 and 4

D

8 and 9

Text Solution

Verified by Experts

The correct Answer is:
C
(c) `Cr_(2)O_(7)^(2-)` ion changes to `CrO_(4)^(2-)` ion in alkaline medium. `CrO_(4)^(2-)` changes to `Cr_(2)O_(7)^(2-)` ion in acidic medium.
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