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Question
Write a short note.
Homologous series
Solution
- The series of carbon compounds formed by joining the same functional group in the place of a particular hydrogen atom on the carbon chains having sequentially increasing length is called homologous series.
- There are different homologous series in accordance with the functional group. For example, homologous series of alcohols, homologous series of carboxylic acids, homologous series of aldehydes, etc.
- All the members of the homologous series are homologues of each other and they can be represented by the same general molecular formula.
- Physical properties generally show a gradual change with the increase in molecular mass in the series whereas chemical properties of the members of the series show similarity because of the presence of the same functional group in them.
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| IUPAC name of the homologus series | |||
| Characteristic bond type | Single bonds | ||
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The phenomenon in which compounds having different structural formulae have the same molecular formula is called _______.
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Saturated hydrocarbon : Single bond : : Unsaturated hydrocarbon : _______
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Consider the following molecular formulae of carbon compounds:
(i) CH3COOH (ii) CH3OH (iii) C2H6 (iv) C3H4 (v) C4H8
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