Which of the following statements is true for the reaction between sodium sulphate solution and barium chloride solution ?
A) It is a double displacement reaction and a white precipitate of barium sulphate is formed .
B) It is a double displacement reaction and a white precipitate of sodium chloride is formed.
C) Sodium undergoes oxidation.
D) Barium undergoes reduction.

Dear student,

The reaction is as follows- 

Na2SO4 +BaCl2  2 NaCl +BaSO4Sodium     Barium    Sodium    Barium sulphate    chloride   chloride    sulphate

It is a double displacement reaction. And a white precipitate of barium sulphate is formed in this reaction.
This is not a redox reaction because all the oxidation states of atoms are constant on both the reactant and product sides.

Hence, the correct option is (A).

Regards

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