Phenol is

Options

A. A weaker base than `NH_(3)`
B. Stronger than carbonic acid
C. Weaker than carbonic acid
D. A neutral compound

Explanation

To answer the question "Phenol is...", we need to analyze the properties of phenol and compare it with other compounds. Here’s a step-by-step solution:

### Step 1: Define Phenol
Phenol is an aromatic compound with the chemical formula C6H5OH. It consists of a hydroxyl group (-OH) bonded to a benzene ring.

**Hint:** Remember that phenol is characterized by its hydroxyl group attached to an aromatic ring.

### Step 2: Identify the Acidic and Basic Properties
Phenol can act as both an acid and a base. The hydroxyl group (-OH) can donate a proton (H+), making phenol a weak acid. Conversely, the oxygen atom in the hydroxyl group can also accept protons, allowing phenol to act as a weak base.

**Hint:** Consider the role of the hydroxyl group in determining the acidic and basic nature of phenol.

### Step 3: Compare with Other Compounds
When comparing phenol to ammonia (NH3) and carbonic acid (H2CO3):
- Phenol is a weaker base than ammonia. Ammonia has a lone pair of electrons on nitrogen that makes it a stronger base.
- Phenol is a stronger acid than carbonic acid (H2CO3) but weaker than strong acids.

**Hint:** Use the strength of acids and bases as a reference point to compare phenol with ammonia and carbonic acid.

### Step 4: Conclusion
Based on the properties analyzed, we can conclude that phenol is a weak acid compared to carbonic acid and a weaker base than ammonia. Thus, the correct characterization of phenol is that it is a weak acid and a weak base.

**Hint:** Summarize the comparisons to solidify your understanding of phenol's properties in relation to other substances.

### Final Answer
Phenol is a weak acid compared to carbonic acid and a weaker base than ammonia.