An organic compound has the formula C4H10O. It reacts with metallic sodium liberating hydrogen.
Write down the formula of three possible isomers of the compound which are similar and react with sodium.

Explanation

To solve the problem, we need to identify three possible isomers of the organic compound with the molecular formula C4H10O that can react with metallic sodium to liberate hydrogen gas. Since the compound contains an -OH group, it is likely an alcohol.

### Step-by-Step Solution:

1. **Identify the Type of Compound:**
The compound C4H10O is likely an alcohol since it reacts with sodium to release hydrogen gas. Alcohols contain the hydroxyl (-OH) functional group.

2. **Determine the Possible Isomers:**
...