D-And F-Block Elements Ques 184

Question: If excess of $ NH_4OH $ is added to $ CuSO_4 $ solution, it forms blue coloured complex which is

[MP PMT 1971, 79; Bihar CEE 1995; RPET 1999; AFMC 2001]

Options:

A) $ Cu{{(NH_3)}_4}SO_4 $

B) $ Cu{{(NH_3)}_2}SO_4 $

C) $ Cu{{(NH_4)}_4}SO_4 $

D) $ Cu{{(NH_4)}_2}SO_4 $

Show Answer

Answer:

Correct Answer: A

Solution:

$ CuSO_4+4NH_4OH\to \underset{Blue}{\mathop{[Cu{{(NH_3)}_4}]}}SO_4+4H_2O $



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