Successive alkanes differ by

In a homologous series, two successive members differ by a .............. group and a molecular mass of ............ amu.

The molecular weight of two adjacent members in homologous series of an alkane differ by ………… units.

The molecular weight of two adjacent members in homologous series of an alkane differ by ………… units.

The alkane is:

What do you mean by succession ? Give one difference between Primary and Secondary succession. Describe process of succession on bare rock.

What is the difference between the molecular formulae of any two suc- cessive alkanes ?