Published by:
CGP EDU Academic Team
Published on: August 14, 2026
A yellow turbidity, sometimes appears on passing 
gas even 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
is oxidised by some acidic radical present in solution D
the third group radicals are precipitated.
Text Solution
Verified by ExpertsThe correct answer is:
C
Radicals such as 
oxidise 
to S which appears as yellow turbidity.
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