Homologous series
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Q.
Define homologous series?
Q. Write the characteristics of Homologous Series.
Q.
What are homologous series? Explain some of the properties of homologous series.
Q.
Give the molecular and structural formulae of the first four members of the homologous series of alkanes.
Q.
What is homologous series? Explain with an example.
Q.
Which of the following is not a member of a homologous series?
CH3−CH3
CH3−CH2−CH3
CH3−CH2−CH2−Cl|CH2
CH3−CH2−CH2−CH3
Q.
Which of the following does not belong to the same homologous series?
Q. The number of compounds given below that belong to same homologous series is ______.
CH2O2, C3H8O, C2H4O2, C2H6, C3H6O2, C4H8O2
CH2O2, C3H8O, C2H4O2, C2H6, C3H6O2, C4H8O2
- four
- five
- three
- two
Q. CH4 and C2H6 form a homologous series, they differ by a
- −CH4−unit
- −CH2−unit
- −CH−unit
- −CH3−unit
Q. The most common characteristics of homologous series is increase in the number of:
- propyl units
- methyl units
- methylene units
- butyl units
Q. Copy and complete the following table which relates to three homologous series of hydrocarbons: [5 MARKS]
General FormulaCnH2nCnH2n−2CnH2n+2IUPAC name of the homologous seriesCharacteristic bond typeSinglebondIUPAC name of the first member of the seriesTypes of reaction with chlorineAddition
General FormulaCnH2nCnH2n−2CnH2n+2IUPAC name of the homologous seriesCharacteristic bond typeSinglebondIUPAC name of the first member of the seriesTypes of reaction with chlorineAddition
Q. CH4 and C2H6 form a homologous series, they differ by:
- a−CH2−unit
- a−CH−unit
- None of the above
- a−CH4−unit
Q.
CH4 and C2H6 form a homologous series, they differ by:
a−CH4−unit
a−CH2−unit
a−CH−unit
None of the above
Q. CH4 and C2H6 belong to the same homologous series and they differ by a
- CH2
- CH3
- CH
Q. Write first five members of the homologous series of alkenes. [3 marks]
Q. All the members in a homologous series have the same
- structure
- general formula
- boiling point
Q. Which amongst the following is not a characteristic of the homologous series?
- The members of a homologous series can be represented by a general formula.
- Successive members of a homologous series differ by a CH3 group.
- The members of a homologous series show a similarity in chemical properties.
- The physical properties in the series of compounds have a regular gradation.
Q. What is the difference in the molecular mass of two consecutive members of homologous series?
- 12 u
- 16 u
- 14 u
- 18 u
Q. If octane and propane are members of a homologous series, then these two compounds differ by ________.
- C5H10
- C4H8
- C4H4
- C2H2
Q. Choose the pairs of compounds belonging to same homologous series.
- Ethane
- Methanol
- Butan-2-one
- Pent-2-yne
- Butane
- Pentan-2-ol
- Propanone
- Ethyne
Q. A series of hydrocarbons with the same general formula is known as:
- heterogeneous series
- homologous series
- molecular chain
- homogeneous series
Q. Which among the following is the eighth member of the homologous series of aldehydes?
- C7H17CHO
- C7H15CHO
- C5H11CHO
- C8H15COOH
