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Sometimes yellow turbidity appears while...

Sometimes yellow turbidity appears while passing `H_2 S` gas even in the absence of group II radicals. This is because of

A

sulphur is present in the mixture as impurity

B

group IV radicals are precipitated as sulphides

C

the oxidation of `H_2 S` gas by some acid radicals

D

group III radicals are precipitated as hydroxides

Text Solution

Verified by Experts

The correct Answer is:
C
Turbidity is due to colloidal sulphur formed as a result of the oxidation of `H_2S ` by some oxidising agent (radicals) present in the mixture .
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