In Lucas test of alcohols, appearance of cloudiness is due to the formation of

Options

A. aldehydes
B. ketones
C. acid Chloride
D. alkyl chloride

Answer

To solve the question regarding the Lucas test of alcohols and the appearance of cloudiness, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Lucas Test**: The Lucas test is a qualitative test used to differentiate between primary, secondary, and tertiary alcohols. It involves the use of Lucas reagent, which is a mixture of anhydrous zinc chloride (ZnCl₂) and concentrated hydrochloric acid (HCl).

**Hint**: Remember that the Lucas test helps in identifying the type of alcohol based on its reactivity.

2. **Reactivity of Alcohols**:
- Primary alcohols do not react at room temperature but may form an oily layer upon heating.
- Secondary alcohols react with the Lucas reagent, showing turbidity and forming an oily layer within 3 to 5 minutes.
- Tertiary alcohols react immediately, resulting in turbidity and the formation of an oily layer.

**Hint**: Focus on the time taken for turbidity to appear as it indicates the type of alcohol.

3. **Chemical Reaction**: When an alcohol (R-OH) reacts with the Lucas reagent, it produces an alkyl chloride (R-Cl) and water. The general reaction is:
\[ R-OH + HCl \xrightarrow{ZnCl_2} R-Cl + H_2O \]

**Hint**: Identify that the product of the reaction is an alkyl chloride, which is key to understanding the cloudiness.

4. **Formation of Cloudiness**: The cloudiness or turbidity observed in the Lucas test is due to the formation of the insoluble alkyl chloride (R-Cl). This insolubility leads to the appearance of a cloudy mixture.

**Hint**: The cloudiness is a direct result of the formation of a product that does not dissolve well in the reaction medium.

5. **Conclusion**: Therefore, the appearance of cloudiness in the Lucas test is due to the formation of alkyl chloride.

**Final Answer**: The correct option is **alkyl chloride**.