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    Question

    Which of the following reactions is a displacement reaction?

    A 2H₂ + O₂ → 2H₂O Correct Answer Incorrect Answer
    B Zn + CuSO₄ → ZnSO₄ + Cu Correct Answer Incorrect Answer
    C NaOH + HCl → NaCl + H₂O Correct Answer Incorrect Answer
    D C + O₂ → CO₂ Correct Answer Incorrect Answer

    Solution

       In a displacement reaction, a more reactive metal displaces a less reactive metal from its compound. Zinc (Zn), being more reactive, displaces copper (Cu) from copper sulfate (CuSO₄), resulting in zinc sulfate (ZnSO₄) and elemental copper. This type of reaction underscores the reactivity series of metals where zinc proves superior to copper. In contrast, the other listed reactions include a combination reaction (A), a neutralization reaction (C), and a combustion reaction (D), none of which involve displacement of elements.

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