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Define homologous series.

1. Compound with same melting point
2. Compound which are stereo isomers
3. Compounds which have different parameters
4. Compound with same general formula

Correct answer: Compound with same general formula

Solution

A homologous series is a group of organic compounds with the same general formula, similar chemical properties, and successive members differing by a CH2 unit. That matches the correct option.

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