Identify a chemical change among the following.

Options

A. Production of sound
B. Magnetization of iron
C. Curdling of milk
D. Melting of ghee

Explanation

To identify a chemical change among the given options, we can follow these steps:

### Step 1: Understand the Definitions
- **Chemical Change**: A process where substances combine or break apart to form new substances. This change is usually irreversible.
- **Physical Change**: A process that alters the form or appearance of a substance but does not change its chemical composition. This change is usually reversible.

### Step 2: Analyze Each Option
1. **Production of Sound**: This does not involve any change in the chemical composition of substances. It is a physical phenomenon, not a chemical change.

2. **Magnetization of Iron**: When iron is magnetized, it changes its magnetic properties but remains iron. This is a physical change because the composition of iron does not change.

3. **Cuddling of Milk**: When milk curdles, it undergoes a transformation where new substances (curds and whey) are formed. This process is irreversible and involves a chemical change.

4. **Melted Ghee**: When ghee is melted, it changes from solid to liquid. This is a physical change as the chemical composition of ghee remains the same.

### Step 3: Identify the Correct Option
From the analysis above, the only option that represents a chemical change is **Cuddling of Milk**.

### Conclusion
The correct answer is **Cuddling of Milk**, which is a chemical change.

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