Ethane, ethene, ethanoic acid, ethyne, ethanol, select the following:
The compound with general formula `C_nH_(2n)`

Explanation

To solve the problem of identifying the compound with the general formula \( C_nH_{2n} \) from the given list (ethane, ethene, ethanoic acid, ethyne, and ethanol), we can follow these steps:

### Step 1: Write the molecular formulas of each compound.
- **Ethane**: \( C_2H_6 \)
- **Ethene**: \( C_2H_4 \)
- **Ethanoic Acid**: \( C_2H_4O_2 \) (or \( CH_3COOH \))
- **Ethyne**: \( C_2H_2 \)
- **Ethanol**: \( C_2H_5OH \) (or \( C_2H_6O \))
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