Multiple choice

The two adjacent members of a homologous series differ by the group ____.

  1. -CH

  2. -CH2

  3. -CH4

  4. -CH3CH2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In a homologous series, each successive member differs by one -CH2- unit (called a methylene group) when moving up or down the series. This constant difference of 14 atomic mass units gives the series its characteristic incremental physical and chemical properties. -CH, -CH4, and -CH3CH2 are not the repeating units.

Keep practicing — related questions