We can show that iron is more reactive than copper :- by preparing copper sulphate solution and dipping iron strip in it
- by dipping both the strips in water for some time
- by preparing iron sulphate solution and dipping copper strip in it
- by heating both iron and copper strips
Correct answer: (1) by preparing copper sulphate solution and dipping the iron strip in it.
Explanation: When an iron strip is dipped into a copper sulphate solution (blue), ferrous sulphate is formed (green). This happens because iron displaces the copper from copper sulphate solution and forms iron sulphate. Hence, it can be concluded that iron is more reactive than copper.
$CuSO_4(aq) + Fe(s) → FeSO_4(aq) + Cu(s)$
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