Sometimes yellow turbidity appears while passing \( \mathrm{H}_{2} \mathrm{~S} \) gas even in th...

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Sometimes yellow turbidity appears while passing \( \mathrm{H}_{2} \mathrm{~S} \) gas even in the absence of II group radicals. This is because of -
(A) Sulphur is present in the mixture as impurity
(B) IV group radicals are precipitated as sulphides
(C) The oxidation of \( \mathrm{H}_{2} \mathrm{~S} \) gas by some acid radicals
(D) III group radicals are precipitated as hydroxides
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