Carbon tetrachloride on heating with phenol and sodium hydroxide gives

Options

A. Salicyclic acid
B. Salicyladehyde
C. Salol
D. Aspirin.

Explanation

To solve the question "Carbon tetrachloride on heating with phenol and sodium hydroxide gives," we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Reaction Type**:
- The reaction between carbon tetrachloride (CCl₄), phenol (C₆H₅OH), and sodium hydroxide (NaOH) is known as the **Colbeige reaction**.

**Hint**: Recognize the key components of the reaction and their roles.

2. **React Phenol with Sodium Hydroxide**:
- When phenol reacts with sodium hydroxide, it forms **sodium phenoxide**. The reaction can be represented as:
\[ C₆H₅OH + NaOH \rightarrow C₆H₅O⁻Na⁺ + H₂O \]
- Here, the hydroxide ion (OH⁻) from NaOH removes a proton (H⁺) from phenol, resulting in the formation of sodium phenoxide.

**Hint**: Remember that phenol is acidic and can lose a proton in the presence of a strong base like NaOH.

3. **Reaction of Sodium Phenoxide with Carbon Dioxide**:
- The sodium phenoxide then reacts with carbon dioxide (CO₂) under pressure, leading to the formation of **sodium salicylate**. The reaction can be represented as:
\[ C₆H₅O⁻Na⁺ + CO₂ \rightarrow C₆H₄(OH)(COO⁻Na⁺) \]
- This product has the carboxylate group (-COO⁻) attached to the ortho position of the phenol ring.

**Hint**: Focus on the ortho position of the aromatic ring where the carboxylate group will attach.

4. **Acidification to Form Salicylic Acid**:
- The final step involves treating the sodium salicylate with dilute hydrochloric acid (HCl), which protonates the carboxylate ion to form **salicylic acid** (C₆H₄(OH)COOH):
\[ C₆H₄(OH)(COO⁻Na⁺) + HCl \rightarrow C₆H₄(OH)(COOH) + NaCl \]
- The product is salicylic acid, which has both a hydroxyl (-OH) and a carboxylic acid (-COOH) group.

**Hint**: Remember that acidification is a common step in organic reactions to convert salts into their corresponding acids.

### Final Answer:
The product of the reaction of carbon tetrachloride with phenol and sodium hydroxide upon heating is **salicylic acid**.