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Question
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Solution
The difference in the molecular formula of any two adjacent homologues is that it differs by three atoms. The difference is due to one carbon atom and two hydrogen atoms, represented as CH2.
RELATED QUESTIONS
Write the name and formula of the 2nd member of homologous series having general formula CnH2n.
The following vegetables are kept in a basket :
Potato, Tomato, Radish, Brinjal, Carrot, Bottle-gourd
Which two of these vegetables correctly represent the homologous structures?
(A) Carrot and Tomato
(B) Potato and Brinjal
(C) Radish and Carrot
(D) Radish and Bottle-gourd
Succeeding members of a homologous series differ by ______.
Give the names and the structural formula of the first three members of the homologous series of alkanes.
What is homologous series ?
Define homologous series of organic compounds. List its two characteristics. Write the name and formula of the first member of the series of alkenes.
The phenomenon in which compounds having different structural formulae have the same molecular formula is called _______.
Cyclohexane : Cyclic hydrocarbon : : Isobutylene : _______
Write a short note.
Homologous series
Complete the following table for homologous series of alcohols.
| Name | Molecular formula | Condensed structural formula | Number of carbon atom | Number of -CH2- units | Boiling point °C |
| Methanol | CH4O | CH3-OH | 1 | 1 | 63 |
| Ethanol | C2H6O | CH3–CH2-OH | 2 | 2 | 78 |
| Propanol | C3H8O | CH3–CH2–CH2-OH | ______ | ______ | 97 |
| Butanol | C4H10O | CH3–CH2–CH2–CH2–OH | ______ | ______ | 118 |
