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 $
