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Sometimes yellow turbidity appears while...

Sometimes yellow turbidity appears while passing `H_(2)S` gas even in slightly acidic medium in the absence of `II` group radicals. This is because:

A

sulphur is present in the mixture as impurity.

B

`IV` group radicals are precipitated as sulphides

C

of the oxidation of `H_(2)S` gas by some acid radicals

D

`III` group radicals are precipitated as hydroxides.

Text Solution

Verified by Experts

The correct Answer is:
C
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