alleryStart learning →When an iron nail is dipped in copper sulphate solution, the reaction that occurs is a
Acombination reaction
Bdecomposition reaction
Cdisplacement reaction
Ddouble displacement reaction
Answer & Solution
Correct answer: C. displacement reaction
1. Iron is more reactive than copper, so it displaces copper from its salt.
2. Fe + CuSO₄ → FeSO₄ + Cu — a **displacement reaction**.
3. The blue solution fades and a brown copper coating forms on the nail.
_Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch1 'Chemical Reactions and Equations', §1.2_
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