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CBSE Class 10 Science 2018 Solved Paper

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Question : 23 of 27
Marks: +1, -0
What is observed when a solution of sodium sulphate is added to a solution of barium chloride in a test tube ? Write equation for the chemical reaction involved and name the type of reaction in this case.
Solution:  
Na2SO4(aq.)Sodium sulphate+BaCl2(aq.)Barium chloride→BaSO4↓(s)Barium sulphate+2NaCl(aq.)Sodium chloride\underset{\text{Sodium sulphate}}{\mathrm{Na_2SO_4(aq.)}} + \underset{\text{Barium chloride}}{\mathrm{BaCl_2(aq.)}} \rightarrow \underset{\text{Barium sulphate}}{\mathrm{BaSO_4\downarrow (s)}} + 2\underset{\text{Sodium chloride}}{\mathrm{NaCl(aq.)}}
It is an example of double displacement reaction.
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