IUPAC name of p-cresol is.......... .

Options

A. 4-Methylphenol
B. 4-Chlorophenol
C. 3-Methoxyphenol
D. Benxene-1,3-diol

Explanation

To determine the IUPAC name of p-cresol, we can follow these steps:

### Step 1: Understand the Structure
- p-Cresol is a methyl-substituted phenol. The "p" in p-cresol indicates that the methyl group (–CH₃) is located at the para position relative to the hydroxyl group (–OH) on the benzene ring.

### Step 2: Identify the Functional Group
- The primary functional group in p-cresol is the hydroxyl group (–OH), which is characteristic of phenols. This group takes precedence in naming.

### Step 3: Number the Carbon Atoms
- Start numbering the carbon atoms in the benzene ring from the carbon that is bonded to the hydroxyl group (–OH).
- Assign the numbers as follows:
1. Carbon with –OH (1)
2. Next carbon (2)
3. Next carbon (3)
4. Carbon with –CH₃ (4)
5. Next carbon (5)
6. Last carbon (6)

### Step 4: Assign the Name
- Since the methyl group is at the para position (4th carbon) relative to the hydroxyl group, the IUPAC name is derived from the base name "phenol" with the substituent indicated.
- Therefore, the name becomes "4-methylphenol".

### Step 5: Conclusion
- The IUPAC name of p-cresol is **4-methylphenol**.

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