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To an aqueous solution of AgNO(3) some N...

To an aqueous solution of `AgNO_(3)` some `NaOH`(aq) is added, till a brown ppt is obtained. To this `H_(2)O_(2)` is added dropwise. The ppt turns black with the evolution of `O_(2)`. The black ppt is

A

`Ag_(2)O`

B

`Ag_(2)O_(2)`

C

`AgOH`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
`2AgNO_(3)(aq)+2NaOH(aq)tounderset("Brown ppt.")(Ag_(2)O(s))+H_(2)O(l)+2NaNO_(3)(aq)`
`Ag_(2)O(s)+H_(2)O_(2)(aq)toH_(2)O(l)+O_(2)(g)underset("Black ppt.")(+2Ag(s))`
The finally divided Ag is black in colour.
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