SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Same general formula
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Similar chemical properties, i.e. undergo the same reactions
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Varying physical properties, i.e. change in a predictable way
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Different functional group
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Detailed explanation-1: -All members are represented by the same genral formula. C is wrong because all members of a homologous series show gradation in physical properties.
Detailed explanation-2: -However, as the molecular mass increases in a homologous series, a gradation in physical properties is observed. So, they do not have identical physical properties.
Detailed explanation-3: -A homologous series is a series of compounds with the same general formula, usually varying by a CH2 group. In the given list of compounds methane, ethane and propane belong to the same homologous series of compounds and butene does not.
Detailed explanation-4: -The members of the homologous series have same functional group. Members have the same general formula. Members have the almost same chemical properties due to same functional group. Members have common general method of preparation.