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(1)light green to blue | (2)blue to colourless |
(3) light green to colourless | (4)bule to yellow |
Correct answer: (2) blue to colourless
Explanation: Zinc is more reactive than copper, hence it displaces copper from its sulphate solution to form zinc sulphate, as a result, the blue colour solution turns colourless.
The chemical equation for the reaction is given below:
$Zn (s) + CuSO_4 (aq) → ZnSO_4 (aq) + Cu (s)$
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