The reaction between iron and copper(II) sulphate solution is an example of
A{'text': 'Combination reaction of two reactants', 'label': 'A'}
B{'text': 'Decomposition of a single compound', 'label': 'B'}
C{'text': 'Neutralisation of an acid and a base', 'label': 'C'}
D{'text': 'Displacement reaction where Fe displaces Cu', 'label': 'D'}
Answer & Solution
Correct answer: D. {'text': 'Displacement reaction where Fe displaces Cu', 'label': 'D'}
1. Fe is more reactive than Cu (Fe is above Cu in the reactivity series).
2. So Fe displaces Cu from CuSO₄ solution.
3. Fe + CuSO₄ → FeSO₄ + Cu (blue solution turns pale green).
4. This is the classic NCERT displacement reaction demonstration.
_Source: NCERT Class 10 Science, Ch 3 "Metals and Non-metals", §3.2.4_
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