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ExamsNEETChemistry

Oleum is:

  1. castor oil
  2. oil of vitriol
  3. fuming sulphuric acid
  4. none of these

Correct answer: fuming sulphuric acid

Solution

Oleum is fuming sulfuric acid, a mixture of sulfuric acid and dissolved sulfur trioxide. It is called “fuming” because it releases SO3 fumes on exposure to air.

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