Four colourless salt solutions are placed in separate test-tubes and a – InterviewSolution

1.	Four colourless salt solutions are placed in separate test-tubes and a strip of copper is placed in each . Which solution finally turns blue
Answer» `CD(NO_(3))_(2)` `ZN(NO_(3))_(2)` `AgNO_(3)` `Pb(NO_(3))_(2)` ANSWER :C

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