Chapter 23, Problem 11PS

Interpretation Introduction

Interpretation: The molecular formula of the alkane has to identfied from the following molecular formula (a) ${\text{C}}_{\text{2}}{\text{H}}_{\text{4}}$, (b) ${\text{C}}_5{\text{H}}_{12}$, (c) ${\text{C}}_{14}{\text{H}}_{30}$, (d) ${\text{C}}_{\text{7}}{\text{H}}_8$

Concept introduction:

The hydrocarbons which have a general formula ${\text{C}}_n{\text{H}}_{2n+2}$ are known as Alkanes. Alkanes can be substituted or unsubstituted, when carbon atom is substituted alkanes are known as substituted alkanes or branched alkanes. In formula, $n$ is the total number of carbon atoms present in molecule. For example if $n$ is equal to $2$ than molecular formula will be ${\text{C}}_{\text{2}}{\text{H}}_{\text{6}}$.