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प्रश्न
Define a homologous series.
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उत्तर
A series of compounds with similar chemical properties, in which members differ from one another by an additional CH2 group, is called a homologous series.
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संबंधित प्रश्न
Write the name and formula of the 2nd member of homologous series having general formula CnH2n + 2.
Complete the following table which relates to the homologous series of hydrocarbons.
|
General Formula |
IUPAC name of the homologous series | Characteristic bond type | IUPAC name of the first member of the series |
| `C_nH_(2n-2)` | (A)________ | (B)______ | (C)______ |
| C_nH_(2n+1) | (B)________ | (E)______ | (F)______ |
Ethene and ethyne are examples of ______ hydrocarbons.
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?
By how many carbon atoms and hydrogen atoms do any two adjacent homologues differ?
Write the names and formulae for the first three members of the homologous series of chloroalkanes.
Succeeding members of a homologous series differ by ______.
.
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.
There are different general molecular formula for all members of the homologous series.
What is called homologous series? Give any three of its characteristics?
Which of the following does not belong to the same homologous series?
Name the following organic compound:
The first homologue whose general formula is CnH2n.
Study and complete the following table:
| Homologous series | Alkane | Alkyne |
| General formula | CnH2n+2 | 1. ______ |
| IUPAC name | 2. ______ | Ethyne |
| Common name | Marsh gas | 3. ______ |
Consider the carbon compounds having following molecular formula:
(i) C2H2 (ii) C2H5 (iii) C3H7OH (iv) C2H6COOH (v) CH3CHO
- Identify which one of the above compounds, is a member of aldehyde series.
- Write the general formula of the series to which compound C2H2 belongs.
- Which one of the above compounds has triple bonds between carbon-carbon atoms?
- Write the molecular formula of the first member of the homologous series to which the compound C3H7OH belongs.
Name and draw the electron dot structure of first homologue of alkynes series.
Name the third homologue of alcohols.
