Exercise

The general formula of three compounds $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ is ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}}$. $\mathrm{B}$ has the highest boiling point and $\mathrm{C}$ has the lowest boiling point.

Name the homologous series to which $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ belong.

Define homologous series of organic compounds. Mention any two characteristics of homologous series.

Why doesn't carbon share four electrons with other $\mathrm{C}$ atom, and exist as ${\mathrm{C}}_2$?

If graphite and fullerene have only 3 bonds, how they are stable?

Write the name of unsaturated hydrocarbons which contains: 
(a) one or more double bonds. 
(b) one or more triple bonds. 
 

a. Name the two simplest alkenes.

b. Now draw their structural formulae.

Explain why the bond in a nitrogen molecule is called a triple bond.

Using dots $\left(\circ \right)$ and crosses $\left(\times \right)$ to represent valence electrons, show the formation of covalent bonds in Carbon tetrachloride.