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  • Solution of II A group precipitate in dil. when treated with <img alt="\mathrm{NH}_{4

Solution of II A group precipitate in dil. \mathrm{HNO}_{3} when treated with \mathrm{NH}_{4} \mathrm{OH} becomes blue because of the presence of

Option: 1

Mg


Option: 2

Cd


Option: 3

Bi


Option: 4

Cu


Answers (1)

best_answer

\mathrm{Cu^{2+}} reacts with \mathrm{NH}_{4} \mathrm{OH} and forms the tetra amine complex [\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}]^{2+} which has deep blue colour.

Hence, the correct answer is Option (4)

Posted by

Anam Khan

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