Which of the following reactions is an example of both a double displacement reaction and a precipitation reaction?
Answer and explanation
Correct answer: Reaction between barium chloride solution and sodium sulphate solution
In aqueous solutions of barium chloride and sodium sulphate, ions exchange: \(\mathrm{BaCl_2(aq)+Na_2SO_4(aq)\rightarrow BaSO_4(s)\downarrow+2NaCl(aq)}\). Insoluble barium sulphate is formed as a solid precipitate. Hence, this is both a double displacement reaction and a precipitation reaction. In contrast, burning magnesium is a combination/oxidation reaction, not an exchange of ions.
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What is the correct answer to this question?
Reaction between barium chloride solution and sodium sulphate solution
Why is this the correct answer?
In aqueous solutions of barium chloride and sodium sulphate, ions exchange: \(\mathrm{BaCl_2(aq)+Na_2SO_4(aq)\rightarrow BaSO_4(s)\downarrow+2NaCl(aq)}\). Insoluble barium sulphate is formed as a solid precipitate. Hence, this is both a double displacement reaction and a precipitation reaction. In contrast, burning magnesium is a combination/oxidation reaction, not an exchange of ions.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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