A strip of copper is placed in four different colourless salt solution – InterviewSolution

InterviewSolution

1.	A strip of copper is placed in four different colourless salt solutions. They are KNO3 , AgNO3 , Zn(NO3 )2 , Ca(NO3)2 . Which one of the solutions will finaky turn blue.
Answer» Silver Nitrate (AgNO₃).

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