CHO group cannot be present in the middle of a chain. Justify.

Explanation

To justify why the CHO group (aldehyde group) cannot be present in the middle of a carbon chain, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the CHO Group**:
- The CHO group is known as the aldehyde functional group. It consists of a carbon atom double-bonded to an oxygen atom (C=O) and single-bonded to a hydrogen atom (H).

2. **Valency of Carbon**:
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