Miller and Urey performed an experiment to prove the origin of life. They took gases ammonia and hydrogen along with

Options

A. CO2 and H20
B. `N_2` and `H_2O`
C. `CH_4` and `N_2`
D. `H_2O` and `CH_4`

Answer

To solve the question regarding the experiment conducted by Miller and Urey to demonstrate the origin of life, follow these steps:

### Step 1: Understand the Experiment
Miller and Urey aimed to test the hypothesis of chemical evolution, which suggests that organic molecules can arise from inorganic substances under prebiotic conditions.

### Step 2: Identify the Gases Used
In their experiment, they used a mixture of gases that were thought to represent the early Earth's atmosphere. The primary gases included:
- Ammonia (NH3)
- Hydrogen (H2)
- Methane (CH4)
- Water vapor (H2O)

### Step 3: Analyze the Options
The question provides four options:
1. CO2H2O
2. N2H2O
3. CH4N2
4. H2H4

### Step 4: Determine the Correct Combination
From the information gathered:
- The gases used in the Miller-Urey experiment included ammonia (NH3), hydrogen (H2), and methane (CH4), along with water vapor (H2O).
- Among the options, the combination that includes methane (CH4) and water (H2O) is the most accurate representation of the gases used in their experiment.

### Step 5: Select the Correct Answer
The correct answer is **option 3: CH4N2**. However, since the experiment specifically included water vapor, it’s important to note that the closest representation of the gases used in the experiment is **CH4 and H2O**, which is not explicitly listed in the options.

### Conclusion
The gases used in the Miller-Urey experiment included ammonia, hydrogen, methane, and water vapor. Therefore, the best option that reflects the gases used is **CH4N2**, as it includes methane, which was part of the experiment.

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