Short answerEasy1 mark
3(i)
State the following:
A substance added to water, to manufacture sulphuric acid in Contact process.
Topic: Sulphuric acid: preparation and properties
Previous-year question practice database
Answer
Exam answer
Oleum, H₂S₂O₇.
Explanation
SO₃ is first absorbed in concentrated H₂SO₄ to form oleum; oleum is then diluted with water.
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