Question

Mixing acid to water is

• A. exothermic reaction
• B. endothermic reaction
• C. neutralisation
• D. none of the above

Answer 1

The Correct Option is A

To solve the problem, we need to identify the type of reaction when acid is mixed with water.

1. Understanding the Reaction:
When an acid is added to water, it releases heat. This is because the dilution of the acid with water involves the breaking of bonds in the acid molecules, which releases energy in the form of heat. Therefore, this process is an exothermic reaction.

2. Verifying Other Options:

- Exothermic Reaction: This is the correct answer, as the reaction releases heat during the mixing of acid and water.
- Endothermic Reaction: This would involve heat being absorbed, which does not occur when acid is mixed with water.
- Neutralisation: This refers to the reaction between an acid and a base, not acid and water.

Final Answer:
Mixing acid with water is an $ \mathbf{exothermic \, reaction} $.