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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_2O`

B

`Ag_2O_2`

C

AgOH

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
`2AgNO_(3(aq))+2NaOH(aq)rarrunderset("Brown ppt")(Ag_2O_((s)))+H_2O_((l))+2NaNO_(3(aq))`
`Ag_2O_((s))+H_2O_(2(aq))rarrH_2O_((l))+O_(2(g))+underset(("Black ppt"))(2Ag_((s)))`
The finely divided Ag is black in colour.
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