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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.
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RELATED QUESTIONS
Write the name and formula of the 2nd member of homologous series having general formula CnH2n.
Write the molecular formula of the 2nd and 3rd member of the homologous series where the first member is ethyne.
What is the difference between two consecutive homologues:
(i) in terms of molecular mass?
(ii) in terms of number and kind of atoms per molecule?
What is a homologous series? Explain with an example.
The number of carbon atoms present in the molecule of fifth member of the homologous series of alkynes is ______.
Define homologous series of organic compounds. List its two characteristics. Write the name and formula of the first member of the series of alkenes.
Copy and complete the following table, which relates to the three homologous series of hydrocarbons:
| General formula | CnH2n | CnH2n-2 | CnH2n+2 |
| IUPAC name of the homologus series | |||
| Characteristic bond type | Single bonds | ||
| IUPAC name of the first member of the series | |||
| Type of reaction with chlorine | Addition |
Assertion (A): In a homologous series of alcohols, the formula for the second member is C2H5OH and the third member is C3H7OH.
Reason (R): The difference between the molecular masses of the two consecutive members of a homologous series is 144.
Cyclohexane : Cyclic hydrocarbon : : Isobutylene : _______
Name the third homologue of aldehydes.
