What will be total number of isomers of compound with molecular formula `C_(7)H_(8)O`

Answer

To determine the total number of isomers for the compound with the molecular formula \( C_7H_8O \), we will analyze the possible structural arrangements of the compound.

### Step-by-Step Solution:

1. **Identify the Functional Groups**:
The molecular formula \( C_7H_8O \) suggests the presence of a benzene ring due to the unsaturation (the formula indicates that it is not fully saturated). The presence of one oxygen atom indicates that it could either be an alcohol or an ether.

2. **Consider the Benzene Ring**:
A benzene ring (C6H6) can accommodate one additional carbon and one oxygen. This means we can have a substituent (like a methyl group) and a functional group (like an alcohol or ether).

3. **Identify Isomers with Alcohol Functional Group**:
- **Benzyl Alcohol**: This is when the hydroxyl group (-OH) is attached to the carbon chain that is directly attached to the benzene ring. The structure is \( C_6H_5CH_2OH \).
- **Ortho, Meta, and Para Substituted Phenols**:
- **Ortho**: Hydroxyl group at position 1 and methyl at position 2.
- **Meta**: Hydroxyl group at position 1 and methyl at position 3.
- **Para**: Hydroxyl group at position 1 and methyl at position 4.

4. **Identify Isomers with Ether Functional Group**:
- **Methyl Phenyl Ether (Anisole)**: This is when the methyl group is attached to the oxygen, forming an ether. The structure is \( C_6H_5OCH_3 \).

5. **Count the Isomers**:
- From the alcohols, we have:
1. Benzyl alcohol
2. Ortho-cresol (ortho-substituted phenol)
3. Meta-cresol (meta-substituted phenol)
4. Para-cresol (para-substituted phenol)
- From the ether, we have:
5. Methyl phenyl ether (Anisole)

6. **Total Isomers**:
Adding these together, we find a total of 5 isomers for the compound with the molecular formula \( C_7H_8O \).

### Final Answer:
The total number of isomers of the compound with the molecular formula \( C_7H_8O \) is **5**.