Which of the following is pyrogallol?

Options

A.
B.
C.
D.

Answer

To determine which of the given options is pyrogallol, we will follow these steps:

### Step 1: Understand the Structure of Pyrogallol
Pyrogallol, also known as 1,2,3-trihydroxybenzene, is a compound that contains a benzene ring with three hydroxyl (–OH) groups attached to it. The positions of these hydroxyl groups are at the 1, 2, and 3 positions of the benzene ring.

### Step 2: Identify the Molecular Formula
The molecular formula of pyrogallol is C6H6O3. This indicates that it consists of six carbon atoms, six hydrogen atoms, and three oxygen atoms.

### Step 3: Analyze the Given Options
Look at the structural formulas or names of the compounds provided in the options. We are looking for a compound that has a benzene ring with three hydroxyl groups at the specified positions.

### Step 4: Compare with Known Isomers
Pyrogallol is one of the isomeric forms of trihydroxybenzene. The other isomers include resorcinol (1,3-dihydroxybenzene) and catechol (1,2-dihydroxybenzene). Ensure that the option you identify as pyrogallol corresponds to the structure with hydroxyl groups at the 1, 2, and 3 positions.

### Step 5: Confirm the Correct Answer
Once you identify the structure that matches the description of pyrogallol, confirm that it is the correct answer among the options provided.

### Final Answer
The correct option for pyrogallol is the one that has the structure of 1,2,3-trihydroxybenzene.

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