The reaction between barium chloride and sodium sulphate is an example of:

Subject: General Science

Topic: Chemical Reactions and Equations

Options:

1. Option A: Combination reaction
2. Option B: Displacement reaction
3. Option C: Double displacement reaction
4. Option D: Redox reaction

Correct Answer:

Option C: Double displacement reaction

Explanation:

The reaction is: Na2SO4(aq) + BaCl2(aq) → BaSO4(s) + 2NaCl(aq). There is an exchange of ions between the reactants (Ba2+ with SO42- and Na+ with Cl-), forming a precipitate. The text calls this a double displacement reaction (and a precipitation reaction).