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(i)What is homologous series of organic compounds? State any two characteristics of a homologousseries. (ii) Draw the electron dot structure for propanal. |
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Answer» Solution :(i) A series of compounds in which the same FUNCTIONAL group substitutes for hydrogen in a carbon CHAIN is called homologous sereis. Characteristics of homologous series: (a) The molecular formulae of any two successive members of a homologous series DIFFER by `-CH_(2)`. (b) There is a regular gradation in PHYSICAL properties of members of a homologous series. (ii) Propanal `(CH_(3)-CH_(2)-CHO)` 
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