A student was asked to carry out a chemical reaction by placing four different metal strips in CuSO4 solution for a considerable time, one by one. Which of the following metal strip will turn the blue CuSO4 solution to a colourless solution in due course of time?
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Correct answer: (3) Mg
Explanation: As magnesium is most reactive(in the above-given options) so that it will displace the copper (Cu) from its sulphate (CuSO4) solution and the blue colour will gradually become colourless.
The chemical equation for the above reaction is given below:
$Mg (s) + 2CuSO_4 (aq) → Mg(SO_4)_2 + 2Cu (s)$
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