The important Physical Properties of Ether are: (1) Lower members are gases and higher members are low boiling liquid with a pleasant smell. (2) The C-O-C bond angle in Ether is about 11° and, therefore, Ether have a net dipole moment. (3) Ether have law polarity and as a result do not show any association by intermolecular Hydrogen bonding, therefor Ether have low boiling point.