Which of the following statements is correct?

Options

A. Heat is absorbed in exothermic reaction.
B. Heat is released in endothermic reaction.
C. Energy released in burning 1 litre of gasoline is 300 MJ.
D. Chemical energy is associated with the forces that give rise to the stability of substances

Explanation

To determine which of the statements is correct, we will analyze each statement one by one based on the definitions of exothermic and endothermic reactions, as well as the properties of chemical energy.

### Step-by-Step Solution:

1. **Understanding Exothermic and Endothermic Reactions**:
- **Exothermic Reaction**: This type of reaction releases heat to the surroundings. As the reaction proceeds, energy is released, which often results in an increase in temperature of the surroundings.
- **Endothermic Reaction**: This type of reaction absorbs heat from the surroundings. As the reaction proceeds, energy is absorbed, which often results in a decrease in temperature of the surroundings.

2. **Analyzing the Statements**:
- **Statement 1**: "Heat is absorbed in exothermic reaction."
- This statement is **incorrect** because exothermic reactions release heat, not absorb it.

- **Statement 2**: "Heat is released in endothermic reaction."
- This statement is **incorrect** because endothermic reactions absorb heat, not release it.

- **Statement 3**: "Energy released in burning one liter of gasoline is 300 mega joule."
- This statement is also **incorrect**. The energy released by burning one liter of gasoline is approximately 46 mega joules, not 300 mega joules.

- **Statement 4**: "Chemical energy is associated with the forces that give rise to the stability of a substance."
- This statement is **correct**. Chemical energy is indeed related to the forces that hold the atoms together in a substance, contributing to its stability.

3. **Conclusion**:
- After analyzing all the statements, the only correct statement is the fourth one: "Chemical energy is associated with the forces that give rise to the stability of a substance."

### Final Answer:
The correct statement is: **"Chemical energy is associated with the forces that give rise to the stability of a substance."**

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