Of the following, saturated hydrocarbons are -

Options

A. Ethyne
B. Cyclohexane
C. n-propane
D. Ethane

Answer

To determine which of the given compounds are saturated hydrocarbons, we need to understand the definitions and characteristics of saturated and unsaturated hydrocarbons.

### Step-by-Step Solution:

1. **Definition of Hydrocarbons**: Hydrocarbons are organic compounds that consist solely of carbon (C) and hydrogen (H) atoms.

2. **Saturated vs. Unsaturated Hydrocarbons**:
- **Saturated hydrocarbons** contain only single bonds (C-C and C-H). They are fully "saturated" with hydrogen atoms.
- **Unsaturated hydrocarbons** contain at least one double bond (C=C) or triple bond (C≡C) between carbon atoms.

3. **Analyzing the Compounds**:
- **Ethyne (C2H2)**: The name indicates a triple bond (indicated by the suffix "yne"). The structure is HC≡CH. Since it contains a triple bond, it is unsaturated.
- **Cyclohexane (C6H12)**: This compound has a cyclic structure with all single bonds. Its structure can be represented as a ring of six carbon atoms, each bonded to two hydrogen atoms. Since it contains only single bonds, it is saturated.
- **n-Propane (C3H8)**: This is a straight-chain alkane with three carbon atoms connected by single bonds (CH3-CH2-CH3). Since it contains only single bonds, it is saturated.
- **Ethane (C2H6)**: This is another straight-chain alkane with two carbon atoms connected by a single bond (CH3-CH3). Since it contains only single bonds, it is saturated.

4. **Conclusion**: The saturated hydrocarbons from the list are:
- Cyclohexane
- n-Propane
- Ethane

### Final Answer:
The saturated hydrocarbons are Cyclohexane, n-Propane, and Ethane.

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