Gaseous mixture used by Miller for synthesis of amino acids through heat and electric discharge included

Options

A. Methane,ammonia, hydrogen and water vapours
B. Methane,ammonia, nitrogen and water vapours
C. Nitrogen, methane, oxygen and water
D. Ammonia, carbon dioxide, nitrogen and water vapours

Answer

**Step-by-Step Solution:**

1. **Understanding the Urey-Miller Experiment**: The Urey-Miller experiment was designed to test the hypothesis of chemical evolution, which suggests that organic compounds can be formed from inorganic precursors under conditions thought to resemble those of early Earth.

2. **Identifying the Gases Used**: The experiment involved simulating the conditions of early Earth, which included a mixture of gases. The primary gases used in the experiment were methane (CH₄), ammonia (NH₃), hydrogen (H₂), and water vapor (H₂O).

3. **Evaluating the Options**:
- **Option 1**: Methane, ammonia, hydrogen, and water vapor - This is correct as these gases were indeed used in the experiment.
- **Option 2**: Methane, ammonia, nitrogen, water vapor - This is incorrect because nitrogen was not part of the original mixture.
- **Option 3**: Ammonia, carbon dioxide, hydrogen - This is incorrect because carbon dioxide was not included in the original gas mixture.
- **Option 4**: Nitrogen, methane - This is incorrect as nitrogen was not used in the experiment.

4. **Conclusion**: The correct answer to the question is that the gaseous mixture used by Miller for the synthesis of amino acids through heat and electric discharge included methane, ammonia, hydrogen, and water vapor.

**Final Answer**: The correct option is **Option 1: Methane, ammonia, hydrogen, and water vapor**.

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