Which one of the following compounds shows the presence of intramolecular hydrogen bond?

Options

A. `H_(2)O_(2)`
B. `HCN`
C. Cellulose
D. Concentrated acetic acid

Explanation

To determine which compound shows the presence of an intramolecular hydrogen bond, we will analyze each option provided:

**Step 1: Understanding Intramolecular Hydrogen Bonding**
- Intramolecular hydrogen bonding occurs when a hydrogen bond forms between two atoms within the same molecule. This stabilizes the molecular structure.

**Step 2: Analyzing Each Compound**
- **Option A: H2O2 (Hydrogen Peroxide)**
- H2O2 has intermolecular hydrogen bonding. The hydrogen bonds form between different H2O2 molecules, not within a single molecule.

- **Option B: HCN (Hydrogen Cyanide)**
- HCN also exhibits intermolecular hydrogen bonding. The hydrogen bonds are formed between different HCN molecules.

- **Option C: Cellulose**
- Cellulose is a polymer made up of beta-D-glucose units. Within the cellulose structure, intramolecular hydrogen bonds can form between hydroxyl groups (-OH) on the same glucose unit, stabilizing the chain conformation.

- **Option D: Concentrated Acetic Acid (CH3COOH)**
- Concentrated acetic acid primarily exhibits intermolecular hydrogen bonding between different acetic acid molecules.

**Step 3: Conclusion**
- Based on the analysis, the compound that shows the presence of intramolecular hydrogen bonding is **Option C: Cellulose**.

**Final Answer: Option C, Cellulose.**

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