Unsaturated hydrocarbons are the compounds of ............... and ...............and contain one or more ............... bonds.

Explanation

To answer the question, we need to fill in the blanks regarding unsaturated hydrocarbons. Let's break it down step by step.

### Step-by-Step Solution:

1. **Identify the Components of Hydrocarbons**:
- Hydrocarbons are compounds made up of two main elements: carbon and hydrogen.

2. **Define Unsaturated Hydrocarbons**:
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