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Which kind of oils contain asphaltic, naphthenic and aromatic hydrocarbons?

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Which kind of oils contain asphaltic, naphthenic and aromatic hydrocarbons?

(a) Paraffin base oil

(b) Asphaltic base oil

(c) Mixed base oil

(d) Other oils

I had been asked this question in an internship interview.

This intriguing question originated from Petroleum topic in chapter Fuels and Combustion of Engineering Chemistry II

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The correct answer is (b) Asphaltic base oil

Easy explanation: Asphaltic base oil consists of non-paraffinic hydrocarbons such as aromatic and naphthenic hydrocarbons. This oil on distillation leave behind asphalt and bitumen.

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