Which of the following is not a constituent of petroleum?

Options

A. paraffin wax
B. petrol
C. lubricating oil
D. coke

Answer

To determine which of the following is not a constituent of petroleum, we can follow these steps:

### Step 1: Understand Petroleum
Petroleum, also known as crude oil, is a natural resource that is formed from the remains of ancient marine organisms. It is a fossil fuel and is composed of various hydrocarbons and other organic compounds.

### Step 2: Identify Common Constituents of Petroleum
Some common constituents of petroleum include:
- **Paraffin**: A type of hydrocarbon that is a major component of petroleum.
- **Petrol (Gasoline)**: A refined product derived from petroleum, used primarily as fuel.
- **Lubricating Oil**: Another product derived from petroleum, used for lubrication in engines and machinery.

### Step 3: Analyze the Given Options
Now, we need to analyze the options provided in the question. We are looking for the option that is not a constituent of petroleum.

### Step 4: Identify the Non-Constituent
Coke is mentioned as one of the options. It is important to note that:
- **Coke** is not a constituent of petroleum. It is produced by heating coal in the absence of air, a process known as carbonization. Coke is primarily composed of carbon and is used in various industrial processes, especially in steel manufacturing.

### Conclusion
Based on the analysis, the correct answer to the question "Which of the following is not a constituent of petroleum?" is **Coke**.

### Final Answer
Coke is not a constituent of petroleum.

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