The compound in which the carbon atom form a closed chain are termed as

Options

A. aliphatic hydrocarbons
B. cycloalkanes
C. alkanes
D. alkenes

Answer

To answer the question regarding the compounds in which carbon atoms form a closed chain, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Hydrocarbons**: Hydrocarbons are organic compounds consisting entirely of hydrogen and carbon. They can be classified into different categories based on their structure.

2. **Types of Hydrocarbons**: Hydrocarbons are generally classified into two main types:
- **Aliphatic Hydrocarbons**: These are open-chain hydrocarbons that can be either saturated (alkanes) or unsaturated (alkenes and alkynes).
- **Aromatic Hydrocarbons**: These contain one or more aromatic rings.

3. **Closed Chain Compounds**: The question specifically asks about compounds where carbon atoms form a closed chain. This indicates that we are looking for a specific type of hydrocarbon.

4. **Identifying Closed Chains**: The compounds where carbon atoms form a closed chain are known as **Cycloalkanes**. Cycloalkanes are a type of aliphatic hydrocarbon where the carbon atoms are arranged in a ring structure and are connected by single bonds.

5. **Conclusion**: Therefore, the compound in which the carbon atoms form a closed chain is termed as **Cycloalkanes**.

### Final Answer:
The compound in which the carbon atoms form a closed chain are termed as **Cycloalkanes**.

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