Multiple choice

Carbolic acid is related to

  1. heavy crude oil

  2. middle oil

  3. light oil

  4. green oil

  5. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This option is correct because a fraction of middle oil contains mainly phenol. Naphthalene crystallises out upon cooling. It is purified by sublimation and used for the manufactured of dyes, drugs, etc.