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Which of the following is not a double displacement reaction?

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BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl

NaCl + AgNO₃ → AgCl + NaNO₃

2NaCl + CaSO₄ → Na₂SO₄ + CaCl₂

Zn + CuSO₄→ ZnSO₄+ Cu

answer is D.

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Detailed Solution

A chemical reaction in which ions get exchanged between two reactants which form a new compound is called a double displacement reaction.

In the reaction Zn + CuSO₄ → ZnSO₄ + Cu only a single ion is exchanged and so it is an example of a displacement reaction and not a double displacement reaction.

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