How are polymers classified on the basis of mode of polymerisation ? Explain with examples.

Explanation

### Step-by-Step Solution:

**Step 1: Introduction to Polymer Classification**
Polymers can be classified based on the mode of polymerization. The two main types are addition polymers and condensation polymers.

**Step 2: Addition Polymerization**
- **Definition**: Addition polymers are formed through the repeated addition of monomers that contain double or triple bonds. During this process, no small molecules are eliminated.
- **Example**: Polyethylene is a common example of an addition polymer. It is formed from the monomer ethene (C2H4), which has a double bond. The polymerization can be represented as:
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