Question

Rank the compounds in order of increasing boiling point. A. B. C. он highest lowest

Answer 1

The boiling point is the temperature at which the vapor pressure of the substance equals the atmospheric pressure. There is a regular change in boiling points of alkyl halides with increasing number of carbon atoms. Since, by increasing the number of carbon atoms its surface area also increases, resulting in greater surface area od electron cloud and greater Vander wall interaction. Hence, the larger molecules have higher boiling point. The boiling point of alcohols are higher than the alkane or alkyl halide, because of hydrogen bonding present in alcohols. So, polar compounds have higher boiling point than the non-polar. Hence, the correct sequence is B<A<C<D