Complete the reaction $C u S O_{2} + Z n \to$

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Solution

When $Z n$ is added to $C u S O_{4}$ solution, zinc displaces copper from copper sulphate & forms $Z n S O_{4}$ solution. This is indicated by colour change from blue to colourless.
$Z n_{(s)} + {C u S O_{4}}_{(a q)} B l u e \to C u_{(s)} + {Z n S O_{4}}_{(a q)} C o l o u r l e s s$

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