Ammonia `(NH_(3))` obtained from different sources always has same proportion of Nitrogen and Hydrogen. It proves the validity of law of :

Options

A. Reciprocal proportion
B. Constant proportion
C. Multiple proportions
D. None of the above

Explanation

To determine which law is demonstrated by the fact that ammonia (NH₃) obtained from different sources always has the same proportion of nitrogen and hydrogen, we can analyze the situation step by step.

### Step-by-Step Solution:

1. **Understanding the Composition of Ammonia**:
- Ammonia (NH₃) is composed of nitrogen (N) and hydrogen (H).
- The chemical formula indicates that for every 1 nitrogen atom, there are 3 hydrogen atoms.

2. **Different Sources of Ammonia**:
- Ammonia can be synthesized from various sources and methods, such as the Haber process (N₂ + 3H₂ → 2NH₃) or other chemical reactions.
- Regardless of the source, the ratio of nitrogen to hydrogen in ammonia remains constant.

3. **Law of Definite Proportions**:
- The observation that ammonia from different sources has the same proportion of nitrogen and hydrogen supports the law of definite proportions (also known as the law of constant composition).
- This law states that a chemical compound always contains its component elements in fixed ratio by mass, regardless of the source or method of preparation.

4. **Conclusion**:
- Since ammonia consistently has the same ratio of nitrogen to hydrogen (1:3) regardless of how it is produced, this validates the law of definite proportions.

### Final Answer:
The validity of the law of definite proportions is proved by the fact that ammonia (NH₃) obtained from different sources always has the same proportion of nitrogen and hydrogen.

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