Question

Calculate the difference in the formulae for

(i) ${\mathrm{CH}}_3\mathrm{OH}$ and ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$ (ii) ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$ and ${\mathrm{C}}_3{\mathrm{H}}_7\mathrm{OH}$

Answer 1

(i) ${\mathrm{CH}}_3\mathrm{OH}$ and ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$:

1. The differences in the formulae of ${\mathrm{CH}}_3\mathrm{OH}$ and ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$ is $-{\mathrm{CH}}_2$.
2. A group of organic compounds consist of particular functional groups is called as homologous series.
3. Every successive member of the homologous series has a difference of $-{\mathrm{CH}}_2$ group from the previous one.
4. Here, ${\mathrm{CH}}_3\mathrm{OH}$ and ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$ are part of Homologous series of alcohol.

(ii) ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$ and ${\mathrm{C}}_3{\mathrm{H}}_7\mathrm{OH}$:

1. Here also, there is a difference of $-{\mathrm{CH}}_2$group between ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$ and ${\mathrm{C}}_3{\mathrm{H}}_7\mathrm{OH}$.