What is observed when a solution of sodium sulphate is added to a solution of barium chloride taken in a test tube? Write equation for the chemical reaction involved and name the type of reaction in this case.

Explanation

### Step-by-Step Solution:

1. **Identify the Reactants**:
The reactants in this reaction are sodium sulfate (Na₂SO₄) and barium chloride (BaCl₂). Both of these compounds are in aqueous solution.

2. **Write the Chemical Equation**:
When sodium sulfate reacts with barium chloride, the reaction can be represented as follows:
\[
...