Which of the following is the first step in the process of crude oil refining?
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Correct option is C)
The first stage of crude processing is known as distillation, or fractionation, and occurs in a column known as a Distillation Column. In this process, the crude oil, which is a mixture of many types of hydrocarbons, is boiled and recondensed to separate the crude oil into components based on ranges of boiling points.