Assertion:- Halogen acid react with alcohol to form haloalkanes.
Reason:- Order of reactivity of halogen acid
`HClgtHBrgtHI`

Options

A. If both Assertion `&` Reason are True `&` the Reason is a correct explanation of the Assertion.
B. If both Assertion `&` Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion `&` Reason are False.

Answer

To solve the assertion and reason question, we need to analyze both statements carefully.

### Step 1: Analyze the Assertion
The assertion states that halogen acids react with alcohols to form haloalkanes.

- **Reaction Overview**: The general reaction can be represented as:
\[ \text{ROH} + \text{HX} \rightarrow \text{RX} + \text{H}_2\text{O} \]
Here, ROH is the alcohol, HX is the halogen acid (like HCl, HBr, HI), RX is the haloalkane formed, and H2O is water.

- **Conclusion**: The assertion is **true** because halogen acids do indeed react with alcohols to form haloalkanes.

### Step 2: Analyze the Reason
The reason states the order of reactivity of halogen acids as HCl > HBr > HI.

- **Reactivity Order**: The correct order of reactivity for halogen acids is actually HI > HBr > HCl. This is because the bond strength of the H-X bond decreases as we move from HCl to HI, making HI the most reactive.

- **Conclusion**: The reason is **false** because the order given is incorrect.

### Final Conclusion
- Since the assertion is true and the reason is false, the correct answer is: **Assertion is true, but reason is false.**