State the law of multiple proportion with example.

Explanation

### Step-by-Step Solution:

1. **Understanding the Law of Multiple Proportions**:
The law of multiple proportions states that when two elements combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element will be in the ratio of small whole numbers.

2. **Identifying Elements and Compounds**:
Let's take the example of carbon (C) and oxygen (O). These two elements can combine to form two different compounds: carbon monoxide (CO) and carbon dioxide (CO₂).

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