Name the non-metal which is used :
(a) To convert vegetable oil into vegetable ghee(solid fat)
(b) As a rocket fuel (in liquid form)
(c) To preserve food materials
(a) Hydrogen is the non-metal which is used to convert vegetable oil into vegetable ghee (solid fat).
(b) Hydrogen is the non-metal which is used as a rocket fuel (in liquid form).
(c) Nitrogen is the non-metal which is used to preserve food materials.