A) ammonium hydroxide dissolves in copper sulphate.
B) copper sulphate solution reacts with \[{{K}_{4}}\left[ Fe{{\left( CN \right)}_{6}} \right].\]
C) ferric chloride reacts with sod. ferrocyanide.
D) anhydrous \[CuS{{O}_{4}}\] is dissolved in water.
Correct Answer: B
Solution :
[b] \[2CuS{{O}_{4}}+{{K}_{4}}\left[ Fe{{\left( CN \right)}_{6}} \right]\xrightarrow{{}}\] \[\underset{Chocolate\text{ }ppt.}{\mathop{C{{u}_{2}}\left[ Fe{{\left( CN \right)}_{6}} \right]+2{{K}_{2}}S{{O}_{4}}}}\,\]
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