A) Ferrous sulphate reacts with \[FeC{{l}_{3}}\]
B) Ferric sulphate reacts with \[{{K}_{4}}\left[ Fe{{(CN)}_{6}} \right]\]
C) Ferrous ammonium sulphate reacts with \[FeC{{l}_{3}}\]
D) Ammonium sulphate reacts with \[FeC{{l}_{3}}\]
Correct Answer: B
Solution :
\[F{{e}_{2}}\,{{(S{{O}_{4}})}_{3}}\to 2F{{e}^{3+}}+3SO_{4}^{2-}\] \[{{K}_{4}}[Fe{{(CN)}_{6}}]+2F{{e}^{3+}}\to \underset{\text{Prussion}\,\text{blue}}{\mathop{F{{e}_{4}}{{[Fe{{(CN)}_{6}}]}_{3}}}}\,\].
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