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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
(c) `AgNO_(3)(aq)+NaCl(aq)rarrunderset("white ppt.")underset()(AgCl(s))+NaNO_(3)(aq)`
`AgCl(s)+2NH_(3)(aq)rarr[Ag(NH_(3))_(2)]^(+)Cl^(-)`
`Cu(NO_(3))_(2)(aq)+4NH_(4)OH(aq)rarr[Cu(NH_(3))_(4)]^(2+)(aq)`
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