Write the :

(a) molecular formula.

(b) electron dot formula and

(c) structural formula of methane and ethane.

How is:

(a) methane and

(b) ethane prepared in the laboratory?

What is a substitution reaction? Give the reaction of chlorine with ethane and name the product formed.

Name the compounds formed when methane burns in:

(a) sufficient air

(b) insufficient air

Give a balanced equation.