Question

What is name of group by which successive member in the homologues series of alkane differ from each other ?

• A. Methylene
• B. Alcohol
• C. Ketone
• D. Amine

Answer 1

The correct option is A Methylene

Successive member of homologous series differ from each other by a methylene $(-C{H}_2-)$ group.
for example - methane $\left(C{H}_4\right)$, ethane$\left(C_2{H}_6\right)$, propane$\left(C_3{H}_8\right)$ etc.