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When a metal rod M is dipped into an aqu...

When a metal rod M is dipped into an aqueous colourless concetrated solution of compound N, the solution turns light blue. Addition of aqueous NaCl to the blue solution gives a white precipitate O. Addition of aqueous `NH_3` dissolves O and gives an intense blue solution.
Q. The final solution contains.

A

`[Pb(NH_(3))_(4)]^(2+)and[CoCl_(4)]^(2-)`

B

`[Al(NH_(3))_(4)]^(3+)`and`[Cu(NH_(3))_(4)]^(2+)`

C

`[Ag(NH_(3))_(2)]^(+)`and`[Cu(NH_(3))4_()](2+)`

D

`[Ag(NH_(3))_(2)]^(+)` and `Ni(NH_(3)_(6)]^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
C
`underset(N)(AgNO_(3))+NaCl tounderset(O)(AgCl)downarrow+NaNO_(3)`
`AgCl+2NH_(3)to[Ag(nH_(3))_(2)]^(+)]Cl^(-)`
Cu(NO_(3))_(2)+4NH_(4)OHto{Cu(NH)_(3))_(4)]^(2+)`
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