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Question
Why homologous series of carbon compounds are so called? Write chemical formula of two consecutive members of a homologous series and state the part of these compounds that determines their (i) physical properties, and (ii) chemical properties.
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Solution
Homologous series of carbon compounds are so called because in such a series of compounds, the same functional group dictates the properties of the carbon compound regardless of the length of the carbon chain. The two consecutive members of a homologous series are CH3OH and C2H5OH (belong to alcohol)
RELATED QUESTIONS
State any four characteristics of a homologous series
Classify the following carbon compounds into two homologous series and name them.
C3H4, C3H6, C4H6, C4H8, C5H8, C5H10
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- physical and
- chemical properties
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 |
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(i) In terms of molecular mass
(ii) In terms of number and kind of atoms per molecule?
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Name the following organic compound:
The first homologue whose general formula is CnH2n.
Write the chemical formula of two consecutive homologous of organic compounds having functional group - OH.
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Name and draw the electron dot structure of first homologue of alkynes series.
