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When a student added a few drops of barium chloride solution to sodium sulphate solution, he obtained a white precipitate instantly. Which of the following type of chemical reaction has been carried out by the student?
(1)combination | (2)ouble displacement |
(3)displacement | (4)decomposition |
Correct answer: (2) double displacement
Explanation: When barium chloride reacts with sodium sulfate, a white precipitate of barium sulphate and sodium chloride salt is formed.
The chemical equation for the reaction is given below:
$BaCl_2 + Na_2SO_4 → 2NaCl + BaSO_4$
This is an example of a double displacement reaction.
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