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Question
The chemical used in the brown ring test is ______.
Options
CuSO4
FeSO4
Fe2(SO4)3
ZnSO4
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Solution
The chemical used in the brown ring test is FeSO4.
Explanation:
In the brown ring test for nitrates, ferrous sulphate (FeSO4) reacts with concentrated sulphuric acid (H2SO4) and nitrate ions to form a brown ring due to the formation of the Fe(NO)2+ (nitroso iron complex).
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