Question

Place the following substances in order of increasing boiling point. CH3CH2OH Ar CH3OCH3

A Ar < CH3CH2OH < CH3OCH3

B CH3OCH3 < Ar < CH3CH2OH

C CH3CH2OH < Ar < CH3OCH3

D Ar < CH3OCH3 < CH3CH2OH

Answer 1

Ans - D ) Ar < CH₃OCH₃  < CH₃CH₂OH

Argon have boiling point = -185.8⁰C

ethanol have boiling point = 78.37⁰ C

dimethyl eher have boiling point = -24⁰C

argon is inert gas have veryweak intermolecular intraction therefore lowest boiling point and between alcohol and ether alcohol have -OH functional group and present intermolecular hydrogen bonding therefore have higher boiling point than corresponding ether such type of hydrogen bonding absent in ether.