Which of the following statement is correct for chemical reaction?

Question

Accepted Answer

The correct answer is: **3. Chemical reaction involves breaking and making of chemical bonds.**

### Explanation:

1. **Chemical reactions are reversible**: This statement is not universally true. While some chemical reactions are reversible (meaning the products can react to form the original reactants), many reactions are irreversible under normal conditions. For example, combustion reactions typically cannot be reversed.

2. **Energy is absorbed during all chemical reactions**: This statement is incorrect. While some chemical reactions absorb energy (endothermic reactions), others release energy (exothermic reactions). Therefore, it is not accurate to say that energy is absorbed during all chemical reactions.

3. **Chemical reaction involves breaking and making of chemical bonds**: This statement is correct. During a chemical reaction, the bonds between atoms in the reactants are broken, and new bonds are formed to create the products. This is a fundamental concept in chemistry and accurately describes what happens during a chemical reaction.

4. **All of the above**: Since options 1 and 2 are incorrect, this option cannot be correct.

### Conclusion:
The most accurate statement regarding chemical reactions is that they involve the breaking and making of chemical bonds (option 3). Understanding this concept is crucial for grasping how substances interact and transform during chemical processes.