alleryIron nail dipped in copper sulfate solution shows colour change because:
ANo reaction occurs
BFe is more reactive than Cu
CCu corrodes iron
DCu is more reactive than Fe
Answer & Solution
Correct answer: B. Fe is more reactive than Cu
Iron is above copper in the reactivity series, so it displaces copper from CuSO₄: Fe + CuSO₄ → FeSO₄ + Cu.
Solution turns from blue to green; nail gets a brown coating.
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