Give one example of Hell-Volhard Zelinsky (HVZ) reaction.

Explanation

### Step-by-Step Solution for Hell-Volhard Zelinsky (HVZ) Reaction

**Step 1: Understand the Reactants**
The HVZ reaction involves a carboxylic acid that contains at least one alpha hydrogen atom. The general structure of a carboxylic acid is R-COOH, where R is a hydrocarbon chain.

**Step 2: Identify the Reagents**
The reagents required for the HVZ reaction are red phosphorus (P) and a halogen, commonly bromine (Br2) or chlorine (Cl2).

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