A) Oxidise any remaining \[{{H}_{2}}S\]
B) Convert ferrous ion into ferric ion
C) Form nitrates which give granular ppts
D) Increase ionisation of ammonium hydroxide
Correct Answer: B
Solution :
HNO3 oxidises \[F{{e}^{2+}}\] to \[F{{e}^{3+}}\] otherwise \[F{{e}^{2+}}\] is not completely precipitated as hydroxideYou need to login to perform this action.
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