What is the usual difference between two consecutive members of a homologous series?
Answer and explanation
Correct answer: One methylene group
A homologous series contains organic compounds with the same functional group and a common general formula. Each successive member differs from the previous one by a –CH₂– unit, called a methylene group. Consequently, the relative molecular mass generally increases by 14 units, because carbon contributes 12 and two hydrogens contribute 2. The other options are unrelated particles and do not define the series’ regular progression.
Frequently asked questions
What is the correct answer to this question?
One methylene group
Why is this the correct answer?
A homologous series contains organic compounds with the same functional group and a common general formula. Each successive member differs from the previous one by a –CH₂– unit, called a methylene group. Consequently, the relative molecular mass generally increases by 14 units, because carbon contributes 12 and two hydrogens contribute 2. The other options are unrelated particles and do not define the series’ regular progression.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Carbon and its Compounds. Topic: Functional groups.
