In early refineries what fraction boiled off second?
A) Naphtha
B) Kerosene
C) Heavy oils
D) Tar
Answer: B
Explanation: A) Incorrect. The first fraction to boil off was naphtha.
B) Correct. The second fraction was kerosene.
C) Incorrect. The third fraction consisted of the heavy oils and tar, which were considered useless and were dumped into nearby rivers and streams.
D) Incorrect. The third fraction consisted of the heavy oils and tar, which were considered useless and were dumped into nearby rivers and streams.
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