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A yellow turbidity, sometimes appears on...

A yellow turbidity, sometimes appears on passing `H_(2)S` gas ever in the absence of the second group radicals. This happens because

A

sulphur is present in the mixture as an impurity

B

the fourth group radicals are precipitated as sulphides

C

`H_(2)S` is oxidised by some acidic radical present in solution

D

the third group radicals are precipitated
Aqueous sodium hydroxide reacts with a metal ion

Text Solution

Verified by Experts

The correct Answer is:
C
`H_(2)S` oxidised by some acid radical (e.g. `NO_(3)^(-)` salt) present in the mixture is to sulphur which appears as yellow turbidity
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