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Colour and Solubility

A strip of co...

Question

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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Solution

$A g N O_{3}$ solution will turn blue.

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Figure

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Colour and Solubility

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