Give two uses of the following mentioning the property being utilized in the said use:

(a) graphite

(b) diamond

(a) The two uses of graphite are:

1. It is used for making the electrodes of electric furnaces.
2. It is used for making lead pencils.

(b) The two uses of diamond are:

1. It is used in jewellery as a gem.
2. Impure diamond is used to cut and drill rocks, glass or other diamonds.