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प्रश्न
Which of the following does not belong to the same homologous series?
विकल्प
CH4
C2 H6
C3 H8
C4 H8
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उत्तर
C4 H8
Explanation -
The succeeding members of the homologues series differ by a —CH2 - unit. The general formula for the alkane is CnH2n+2. Methane (CH4), ethane (C2H6) and propane (C3H8) are members of homologues series for alkanes while butene (C4H8) is the fourth member of homologues series for alkene.
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संबंधित प्रश्न
State any four characteristics of a homologous series
Write the molecular formula of two consecutive members of homologous series of aldehydes. State which part of these compounds determines their
- physical and
- chemical properties
Give the structural formula for 1, 2-dichloroethane
Give the molecular formula of one homologue of the following:
C3H6
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 for chloroalkanes.
The molecular formula of a homologue of butane is:
(a) C4H8
(b) C3H6
(c) C4H6
(d) C3H8
The number of carbon atoms present in the molecule of fifth member of the homologous series of alkynes is:
(a) four
(b) five
(c) six
(d) seven
Give the abbreviated formula of the third member of the alcohol.
Give the structure of the second member of the alcohol group.
What is the difference in the molecular formula of any two adjacent homologues in terms of molecular mass?
Write names of first four homologous series of alcohols.
Give three points to differentiate between saturated and unsaturated
hydrocarbons.
The general molecular formula for the homologous series of alkynes is _______.
There are different general molecular formula for all members of the homologous series.
Complete the following table for the homologous series of alkanes.
| Name | Molecular formula | Condensed structural formula | Number of carbon atom | Number of -CH2- units | Boiling point °C |
| Methane | CH4 | CH4 | 1 | 1 | -162 |
| Ethane | C2H6 | CH3–CH3 | 2 | 2 | -88.5 |
| Propane | C3H8 | CH3–CH2–CH3 | 3 | 3 | -42 |
| Butane | C4H10 | CH3–CH2–CH2–CH3 | ______ | ______ | 0 |
| Pentane | C5H12 | CH3–CH2–CH2–CH2–CH3 | ______ | ______ | 36 |
| Hexane | C6H14 | CH3–CH2–CH2–CH2–CH2–CH3 | ______ | ______ | 69 |
Which of the following does not belong to the same homologous series?
Successive members of a homologous series vary by how many atomic mass unit?
Name the following organic compound:
The first homologue whose general formula is CnH2n.
Consider the following molecular formulae of carbon compounds:
(i) CH3COOH (ii) CH3OH (iii) C2H6 (iv) C3H4 (v) C4H8
- Which one of these compounds belongs to homologous series of alcohols?
- Identify the compound having triple bond between carbon-carbon atoms.
- Write the molecular formula of the first member of the homologous series to which CH3COOH belongs.
- Write the general formula of the series to which the compound C4H8 belongs.
