Q.

Which undesirable compound is present in gasoline?

A. sulphur compounds
B. phosphorous compounds
C. chloride compounds
D. magnesium compounds
Answer» A. sulphur compounds
Explanation: the gasoline obtained by any process contains some sulphur compounds and unsaturated hydrocarbons, which get oxidized and polymerised to gums and sludge’s. hence it has to be refined by chemical processes.
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