Multiple choice general knowledge science & technology

Sulphuric acid is prepared from which of the following?

  1. oleum

  2. pitch blende

  3. blue vitriol

  4. washing soda
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A Correct answer
Explanation

Sulphuric acid (H2SO4) is industrially prepared by the contact process, where oleum (fuming sulphuric acid, H2S2O7) is an intermediate product. Oleum is then diluted with water to produce concentrated sulphuric acid. This process allows for efficient production of high-purity sulphuric acid at industrial scale.

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