The GATE Grind

GATE 2023 CH – Question 16

Chemical Technology · Inorganic chemical industries · 1 mark · Multiple choice

Which one of the following options represents the major components of oleum?

  1. Sulfuric acid and nitric acid
  2. Concentrated sulfuric acid and petroleum jelly
  3. Sulfuric acid and hydrochloric acid
  4. Sulfuric acid and sulfur trioxide

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Correct answer: (D) Sulfuric acid and sulfur trioxide

Explanation

Oleum, or fuming sulphuric acid, is sulphuric acid that holds dissolved sulphur trioxide (SO₃).