When \( \mathrm{NH}_{4} \mathrm{OH} \) is added to copper sulphate solution, blue colour is obta...
When \( \mathrm{NH}_{4} \mathrm{OH} \) is added to copper sulphate solution, blue colour is obtained due to formation of:
(A) \( \mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{SO}_{4} \)
(B) \( \mathrm{Cu}\left(\mathrm{NH}_{4} \mathrm{SO}_{4}\right)_{2} \)
(C) \( \mathrm{Cu}(\mathrm{OH})_{2} \)
(D) \( \mathrm{CuO} \)
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