Q 2045256163.     In qualitative analysis when `H_2S` is passed through an aqueous solution of
salt acidified with dil. HCl, a black precipitate is obtained. On boiling the
precipitate with dil `HNO_3` , it forms a solution of blue colour. Addition of
excess of aqueous solution of ammonia to this solution gives ......... .

NCERT Exemplar 07/02/MCQ
A

deep blue precipitate of `Cu (OH)_2`

B

deep blue solution of `[Cu (NH_3)_4]^(2+)`

C

deep blue solution of `Cu(NO_3)_2`

D

deep blue solution of `Cu (OH)_2 · Cu (NO_3)_2`

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