This reaction involves a more reactive metal (iron, Fe) displacing a less reactive metal (copper, Cu) from its salt solution (copper sulphate, CuSO4). The general form of a displacement reaction involving metals is A + BX → AX + B, where A is more reactive than B.
An iron nail dipped in copper sulphate solution turns brown. This is due to which one of the following types of reactions ?
Asked in UPSC NDA 1 2023 · Topic: Physical and Chemical Changes, Solution (Definition and Characteristics of Chemical Changes (Chemical Reactions))
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Answer: D. Displacement reaction
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