Barium chloride on reacting with ammonium sulfate forms barium sulfate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?

(i) Displacement reaction

(ii) Precipitation reaction

(iii) Combination reaction

(iv) Double displacement reaction

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(i) only

(ii) only

(iv) only

(ii) and (iv)

answer is D.

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Detailed Solution

Concept: When two solutions containing soluble salt contact with one another, a precipitation reaction occurs that results in the creation of insoluble salt. The precipitate is another name for the insoluble salt that is found at the beaker's bottom. The double displacement reaction is a category of reaction in which two chemicals interact by exchanging ions to create a new molecule.
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Barium displaces ammonium ion and forms barium sulphate and ammonium ion displaces barium and forms ammonium chloride. So, it's a double displacement reaction.
The barium sulphate forms a precipitate and its a precipitation reaction. The precipitate at the bottom of the beaker, which is white in colour, is barium sulphate.
Hence, the correct answer is option 4.

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