The molecular structure of the straight-run gasoline is changed by a) reforming b) refining c) cracking d) boiling

The molecular structure of the straight-run gasoline is changed by a) reforming b) refining c) cracking d) boiling
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Answer: a Explanation: The molecular structure of the straight-run gasoline is changed by reforming and hydrocarbons are decomposed into smaller hydrocarbons by cracking.
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