PART - 1 CH - 4 Carbon and Its Compounds — Science STD 10 — Question
Gujarat BoardEnglish MediumSTD 10SciencePART - 1 CH - 4 Carbon and Its Compounds4 Marks
Question
What is an homologous series? Explain with an example.
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Answer
Definition : A series of compounds in which hydrogen atom/atoms remain in carbon chain are replaced by same functional group, then it constitute the homologous series. OR A series of organic compounds in succession which differ by a definite group (like $- \text {CH} _2-$) is called homologous series. Explanation : $CH _3- OH \quad$ Methanol $CH _3- CH _2- OH$ Ethanol $CH _3- CH _2- CH _2- OH \quad$ Propanol $CH _3- CH _2- CH _2- CH _2- OH$ Butanol → It is a homologous series of alcohol where each member of the series possesses functional group $-\text {OH}$ (Hydroxyl group). → The difference in molecular formula between two successive members of the series is equal to $- CH _2-$, hence, difference in molecular masses of any two successive members of the series is 14 u.
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