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When H2S has is passed through an orange...

When `H_2S` has is passed through an orange red solution (X), the solution turns milky. When an alkali is added to this orange red solution it turns yellow and on acidifying this yellow solution again turns orange red. X is

A

`K_2CrO_4`

B

`KMnO_4`

C

`Na_2Cr_2O_7`

D

`K_2Cr_2O_7`

Text Solution

Verified by Experts

The correct Answer is:
d

X can be either `Na_2Cr_2O_7` or `K_2Cr_2O_7`, however `K_2Cr_2O_7` gives orange red solution.
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