This section contains Assertion and Reason type questions .Each question has 4 choices (1)(2)(3) and (4) out of which only one is correct
Assertion(A): Dissolution of sodium sulphate is an exothermic process
Reason:exothermic processes are accompanied by the evolution of heat

Answer

To solve the assertion and reason question, we need to analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Dissolution of sodium sulphate is an exothermic process."
- To evaluate this, we need to recall what happens when sodium sulfate (Na2SO4) dissolves in water. The dissolution of sodium sulfate is actually an endothermic process, meaning it absorbs heat from the surroundings.

2. **Understanding the Reason**:
- The reason states that "exothermic processes are accompanied by the evolution of heat."
- This statement is true. In exothermic reactions, heat is released into the surroundings.

3. **Evaluating the Assertion and Reason Together**:
- Since the assertion is incorrect (the dissolution of sodium sulfate is endothermic, not exothermic), and the reason is correct (exothermic processes do release heat), we can conclude that the assertion does not support the reason.

4. **Conclusion**:
- The correct answer is that the assertion is false, and the reason is true. Therefore, the correct choice would be the one that states that the assertion is false and the reason is true.

### Final Answer:
The assertion is false, and the reason is true.