Which of the following contains molecules only?

Options

A. Sugar
B. NaOH
C. HCI
D. Carbonic acid

Explanation

To determine which of the given options contains molecules only, we need to analyze each option based on whether they are ionic or covalent compounds. Here's the step-by-step solution:

### Step 1: Understand the types of compounds
- **Covalent Compounds**: Formed by the sharing of electrons between atoms. They exist as molecules and do not dissociate into ions in solution.
- **Ionic Compounds**: Formed by the transfer of electrons, resulting in the formation of cations and anions. They dissociate into ions in solution.

### Step 2: Analyze the options
1. **Sugar (C12H22O11)**:
- Sugar is a covalent compound. It is made up of molecules that do not dissociate into ions. Therefore, sugar contains molecules only.

2. **Sodium Hydroxide (NaOH)**:
- Sodium hydroxide is an ionic compound. In solution, it dissociates into Na⁺ and OH⁻ ions. Therefore, it does not contain molecules only.

3. **Hydrochloric Acid (HCl)**:
- Hydrochloric acid is also an ionic compound. It dissociates into H⁺ and Cl⁻ ions in solution. Thus, it does not contain molecules only.

4. **Carbonic Acid (H2CO3)**:
- Carbonic acid is another ionic compound. It can dissociate into H⁺ and CO₃²⁻ ions. Hence, it does not contain molecules only.

### Step 3: Conclusion
After analyzing all the options, we find that:
- **Sugar** is the only option that contains molecules only.

### Final Answer:
The correct answer is **Sugar (C12H22O11)**.

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