Assertion: Bleaching powder reacts with dilure acids to evolve chlorine
Reason: The chlorine liberated by the action of dilute acids on bleaching powder is called avilable chlorine .

Options

A. if both assertion and reason are true and reason is thr correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reson are false.

Explanation

To solve the given assertion and reason question, we will analyze both statements step by step.

### Step 1: Analyze the Assertion
The assertion states that "Bleaching powder reacts with dilute acids to evolve chlorine."

- **Chemical Reaction**: When bleaching powder (calcium hypochlorite, Ca(OCl)2) reacts with a dilute acid, such as hydrochloric acid (HCl) or sulfuric acid (H2SO4), it produces chlorine gas (Cl2).
- **Example Reaction**:
\[ \text{Ca(OCl)}_2 + 2 \text{HCl} \rightarrow \text{CaCl}_2 + 2 \text{H}_2\text{O} + \text{Cl}_2 \]
- **Conclusion**: The assertion is true as bleaching powder does indeed react with dilute acids to release chlorine gas.

### Step 2: Analyze the Reason
The reason states that "The chlorine liberated by the action of dilute acids on bleaching powder is called available chlorine."

- **Definition of Available Chlorine**: Available chlorine refers to the amount of chlorine that can be released from a compound, such as bleaching powder, when it reacts. It is often expressed in terms of the percentage of chlorine that can be liberated from one mole of bleaching powder.
- **Clarification**: When one mole of bleaching powder reacts with an acid, the chlorine released is termed as available chlorine, which is significant in understanding the bleaching action and disinfecting properties of the compound.
- **Conclusion**: The reason is also true, as it accurately describes what available chlorine is.

### Step 3: Determine the Relationship
- Both the assertion and reason are true statements.
- However, the reason does not provide a correct explanation for the assertion. The assertion describes a chemical reaction, while the reason defines a term related to the product of that reaction.

### Final Conclusion
- **Assertion**: True
- **Reason**: True
- **Explanation Relationship**: The reason is not the correct explanation of the assertion.

### Answer
The correct answer is that both statements are true, but the reason is not the correct explanation of the assertion.

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