Miller created similar conditions in a laboratory scale for explaining the origin of life . The combination ratio of gases ` CH_4, H_2 and NH_3 `is

Options

A. `2: 1: 2`
B. ` 2: 2: 1`
C. ` 2: 2: 3`
D. ` 1: 2: 2`

Answer

To solve the question regarding the combination ratio of gases (methane, hydrogen, and ammonia) used by Miller in his experiment to explain the origin of life, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Experiment**:
- Stanley Miller conducted an experiment to simulate the conditions of early Earth to understand how life could have originated chemically.

2. **Identifying the Gases Used**:
- The gases used in Miller's experiment were methane (CH₄), hydrogen (H₂), and ammonia (NH₃).

3. **Determining the Ratio**:
- In the experiment, Miller used a specific ratio of these gases. The correct ratio is essential to replicate the conditions believed to be present on early Earth.

4. **Stating the Ratio**:
- The combination ratio of gases used in Miller's experiment is 2:2:1. This means:
- 2 parts of Methane (CH₄)
- 2 parts of Hydrogen (H₂)
- 1 part of Ammonia (NH₃)

5. **Evaluating the Options**:
- The question provides several options for the ratio:
- Option 1: 2:1:2 (Incorrect)
- Option 2: 2:2:1 (Correct)
- Option 3: 2:2:3 (Incorrect)
- Option 4: 1:2:2 (Incorrect)
- The correct answer is Option 2, which matches the ratio of 2:2:1.

### Final Answer:
The combination ratio of gases (methane, hydrogen, and ammonia) used by Miller in his experiment is **2:2:1**.

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