substance W is a fossil fuel. It occurs deep below the ground in certain areas of the earth. Another fossil fuel X is found trapped above the deposits of W. When W is subjected to a process called Y, then a number of different products(fractions) are collected at different temperature ranges which are put to different uses. A special grade of product Z obtained in this way is used as aviation fuel in jet aeroplanes. The product Z is also used in stoves, lamps etc.
(a) What are the substances W and X?
(b) What is the process Y called?
(c) Name the product Z
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Explanation:
It occurs deep below the ground in certain areas of the earth. So W is petroleum. Another fossil fuel X is found trapped above the deposits of W. X is natural gas.
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