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

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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 solution will finally turn blue?
Answer» A strip of copper is placed in four different colourless salt solutions. They are $K N O_{3}, A g N O_{3}, Z n (N O_{3})_{2} C a (N O_{3})_{2}$ . Which one of the solution will finally turn blue?

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