Why does formic acid exist as dimer? What is its one consequence?

Explanation

### Step-by-Step Text Solution:

1. **Understanding Formic Acid Structure**:
- Formic acid (HCOOH) has the following structure:
- H-C(=O)-O-H.
- It consists of a carbon atom bonded to a hydroxyl group (-OH) and a carbonyl group (C=O).

2. **Formation of Dimer**:
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