Maximum number of active hydrogen are present in

Options

A. ethanoic acid
B. ethyne
C. methanol
D. glycerol

Answer

To determine which compound has the maximum number of active hydrogens, we need to analyze the given compounds one by one. Active hydrogens are those that can participate in chemical reactions, typically acidic hydrogens that can be released as H⁺ ions.

### Step-by-Step Solution:

1. **Identify the Compounds**: The compounds given are:
- Compound 1: CH₃C(=O)OH (Acetic Acid)
- Compound 2: CH₃OH (Methanol)
- Compound 3: Glycerol (C₃H₈O₃)

2. **Analyze Compound 1 (Acetic Acid)**:
- Structure: CH₃C(=O)OH
- Active Hydrogen: The hydrogen in the hydroxyl group (OH) is the active hydrogen.
- Count: There is **1 active hydrogen** in acetic acid.

3. **Analyze Compound 2 (Methanol)**:
- Structure: CH₃OH
- Active Hydrogen: The hydrogen in the hydroxyl group (OH) is the active hydrogen.
- Count: There is **1 active hydrogen** in methanol.

4. **Analyze Compound 3 (Glycerol)**:
- Structure: Glycerol has the formula C₃H₈O₃, which can be represented as:
- CH₂(OH) - CH(OH) - CH₂(OH)
- Active Hydrogens: Each hydroxyl group (OH) contributes an active hydrogen.
- Count: There are **3 active hydrogens** in glycerol (one from each OH group).

5. **Compare the Counts**:
- Acetic Acid: 1 active hydrogen
- Methanol: 1 active hydrogen
- Glycerol: 3 active hydrogens

6. **Conclusion**: The compound with the maximum number of active hydrogens is **Glycerol** with **3 active hydrogens**.

### Final Answer:
The maximum number of active hydrogens is present in **Glycerol**.