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  4. 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

Coordination Compounds

Solution:

$CuSO _4+4 NH _3 \rightarrow\left[ Cu \left( NH _3\right)_4\right] SO _4$
Blue complex due to $\left[ Cu \left( NH _3\right)_4\right]^{2+}$