Reaction of zinc with copper sulphate solution is:

Z n + 2 C u S O_{4} \to Z n S O_{4} + 2 C u

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2 Z n + C u S O_{4} \to 2 Z n S O_{4} + C u

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Z n + C u S O_{4} \to Z n S O_{4} + C u

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none of these

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Solution

The correct option is C $Z n + C u S O_{4} \to Z n S O_{4} + C u$
on adding zinc to $C u S O_{4}$ solution, zinc displaces copper from copper sulphate & forms zinc sulphate solution because zinc is more reactive metal which displaces less reactive metal from its solution.

This is indicated by a colour change from blue to colourless.

$C u S O_{4}$ solution has a blue colour while $Z n S O_{4}$ solution is colourless.

$Z n + C u S O_{4} \to Z n S O_{4} + C u$

Option C is correct.

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