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Which of the following equations represents a double displacement reaction?

Answer and explanation

Correct answer: \(\mathrm{Na_2SO_4(aq) + BaCl_2(aq) \rightarrow BaSO_4(s) + 2NaCl(aq)}\)

In a double displacement reaction, the ions of two ionic compounds exchange partners. In option A, \(\mathrm{Na^+}\) and \(\mathrm{Ba^{2+}}\) form new ionic pairs with the anions, producing insoluble \(\mathrm{BaSO_4}\) as a precipitate. Option B is a single displacement reaction because zinc displaces copper from its salt.

Related tags

ScienceClass-10Chemical-ReactionsDouble-DisplacementIonic-ReactionsPrecipitation

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