The reaction which proceeds with evolution of heat is called

Options

A. exothermic
B. endothermic
C. may be exothermic or endothermic
D. neither endothermic nor exothermic

Answer

To solve the question "The reaction which proceeds with evolution of heat is called," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Terms**:
- First, we need to understand what is meant by "evolution of heat." This refers to the release of heat during a chemical reaction.

2. **Types of Reactions**:
- Chemical reactions can be classified into two main types based on heat exchange:
- **Exothermic Reactions**: These are reactions that release heat into the surroundings.
- **Endothermic Reactions**: These are reactions that absorb heat from the surroundings.

3. **Identifying the Correct Term**:
- Since the question specifically asks for a reaction that involves the evolution (release) of heat, we focus on exothermic reactions.

4. **Examples of Exothermic Reactions**:
- A common example of an exothermic reaction is combustion, where substances burn in the presence of oxygen, producing carbon dioxide, water, and heat.

5. **Conclusion**:
- Therefore, the reaction which proceeds with the evolution of heat is called an **Exothermic Reaction**.

### Final Answer:
The reaction which proceeds with evolution of heat is called an **Exothermic Reaction**.

---