In miller's experiment the following was not part of the starting chemicals

Options

A. `H_2S`
B. `H_2`
C. `NH_3`
D. `CH_4`

Answer

**Step-by-Step Solution:**

1. **Understand the Context of Miller's Experiment**: Miller's experiment, conducted in 1953, aimed to simulate the conditions of early Earth to understand the origin of life. It focused on how simple organic compounds could form from inorganic precursors.

2. **Identify the Starting Chemicals Used**: In Miller's experiment, the primary gases used were:
- Methane (CH4)
- Ammonia (NH3)
- Hydrogen (H2)
- Water vapor (H2O)

3. **Analyze the Options Given**: The question provides four options regarding the starting chemicals:
- H2S (Hydrogen sulfide)
- H2 (Hydrogen)
- NH3 (Ammonia)
- CH4 (Methane)

4. **Determine Which Chemical Was Not Used**: Among the options, H2S (Hydrogen sulfide) was not part of the starting chemicals in Miller's experiment. The experiment primarily utilized methane, ammonia, and hydrogen.

5. **Conclude the Answer**: Therefore, the correct answer to the question is that H2S was not part of the starting chemicals in Miller's experiment.

**Final Answer**: H2S (Hydrogen sulfide) was not a part of the starting chemicals.

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