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Chemistry
The deep blue colour produced on adding excess of ammonia to copper sulphate is due to presence of
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Q. The deep blue colour produced on adding excess of ammonia to copper sulphate is due to presence of
The p-Block Elements - Part2
A
$Cu ^{2+}$
B
$\left[ Cu \left( NH _3\right)_4\left( H _2 O \right)_2\right]^{2+}$
C
$\left[ Cu \left( NH _3\right)_6\right]^{2+}$
D
$\left[ Cu \left( NH _3\right)_2\left( H _2 O \right)_4\right]^{2+}$
Solution:
$[Cu(H_2O)_6]SO_4 + 2H_4OH \rightarrow \underset{\text{(pale blue)}}{[Cu(H_2O)_4(OH)_2]}$ $\xrightarrow{\text{excess} NH_4OH} \underset{\text{(deep blue)}}{[Cu(NH_3)_4(H_2O)_2]^{2+}}$