A homologous series is a series of organic compounds which belong to the same family i.e., possess same functional group) and show similar chemical properties. The members of this series are called homologous and differ from each other by the number of `CH_2`, units in the main carbon chain.
The compound `CH_3 CH(OH)CH_3` belongs to which of the following homologous series?

Options

A. Aldehydes
B. Alcohols
C. Ketones
D. Carboxylic acids

Answer

To determine which homologous series the compound \( CH_3CH(OH)CH_3 \) belongs to, we can follow these steps:

### Step 1: Identify the Structure of the Compound
The given compound is \( CH_3CH(OH)CH_3 \). We can break it down:
- \( CH_3 \) represents a methyl group.
- \( CH(OH) \) indicates a carbon atom bonded to a hydroxyl group (–OH), which is characteristic of alcohols.
- The second \( CH_3 \) is another methyl group.

### Step 2: Recognize the Functional Group
The presence of the hydroxyl group (–OH) in the structure indicates that this compound is an alcohol. Alcohols are characterized by having one or more hydroxyl groups attached to a carbon atom.

### Step 3: Determine the Homologous Series
Since the compound has a hydroxyl group, it belongs to the homologous series of alcohols. Alcohols are a family of organic compounds that share the same functional group (–OH) and exhibit similar chemical properties.

### Conclusion
Thus, the compound \( CH_3CH(OH)CH_3 \) belongs to the homologous series of **alcohols**.

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