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Four colourless salt solutions are place...

Four colourless salt solutions are placed in separate test-tubes and a strip of copper is placed in each . Which solution finally turns blue

A

`Zn(NO_(3))_(2)`

B

`AgNO_(3)`

C

`Cd(NO_(3))_(2)`

D

`Pb(NO_(3))_(2)`

Text Solution

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The correct Answer is:
B
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