Sometimes yellow turbidity appears while passing H_2 S gas even in the – InterviewSolution

1.	Sometimes yellow turbidity appears while passing H_2 S gas even in the absence of group II radicals. This is because of
Answer» sulphur is PRESENT in the mixture as impurity group IV radicals are precipitated as sulphides the OXIDATION of `H_2 S` gas by some acid radicals group III radicals are precipitated as hydroxides Solution :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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