In CuSO_4 solution, on adding excess of NH_4OH.the solution turns blue – InterviewSolution

1.	In CuSO_4 solution, on adding excess of NH_4OH.the solution turns blue due to the formation of:
Answer» `CuSo_4NH_4OH` `[CU(NH_3)_4]SO_4` `[Cu(NH_3)_2](So_4)_2` `Cu(OH)_2` Answer :B

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