D-And F-Block Elements Ques 484

Question: A blue colouration is not obtained when

Options:

A) ammonium hydroxide dissolves in copper sulphate.

B) copper sulphate solution reacts with $ K_4[ Fe{{( CN )}_6} ]. $

C) ferric chloride reacts with sod. ferrocyanide.

D) anhydrous $ CuSO_4 $ is dissolved in water.

Show Answer

Answer:

Correct Answer: B

Solution:

$ 2CuSO_4+K_4[ Fe{{( CN )}_6} ]\xrightarrow{{}} $ $ \underset{Chocolateppt.}{\mathop{Cu_2[ Fe{{( CN )}_6} ]+2K_2SO_4}}, $



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