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Write brief answers to the following question:
 
Write some important uses of the various constituents of petroleum.
 
(i). Petroleum gas in liquid form (LPG) is used as fuel in homes and industries.

(ii). is used as fuel for automobiles and aviation.

(iii). is used as fuel for stoves, lamps and jet aircrafts.

(iv). is used as fuel for heavy motor vehicles, electric generators.

(v). Lubricating oil is used for lubrication.

(vi). is used in ointments, candles, vaseline, etc.,

(vii). is used in paints and road surfacing.