With the exception of water, which one of the
following is possibly the most important
accessory chemical substance in industrial process ?
(a) Petroleum (b) Rubber
(c) Ethanol (d) Liquid nitrogen
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The petroleum industry includes the global processes of exploration, extraction, refining, transporting, and marketing petroleum products. The largest volume products of the industry are fuel oil and gasoline (petrol). Petroleum (oil) is also the raw material for many chemical products, including pharmaceuticals, solvents, fertilizers, pesticides, and plastics.
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