Answer :

(a) To convert vegetable oil into vegetable ghee (solid fat) the non-metal which is used is Hydrogen.

(b) As a rocket fuel (in liquid form) the non-metal which is used is Hydrogen.

(c) To make electrodes of dry cells the non-metal which is used is Carbon (as Graphite).

(d) To preserve food materials the non-metal which is used is Nitrogen.

(e) In the valcanisation of rubber the non-metal which is used is Sulphur.

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