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  9. Q319

RRB Group D (Level-1 posts) 2022 · Question 319 of 598

Calcium sulphate dihydrate is the chemical name of:

  1. AWashing soda
  2. BGypsumCorrect
  3. CBaking powder
  4. DPlaster of Paris

Answer: B. Gypsum

Explanation

Calcium sulphate dihydrate (CaSO₄·2H₂O) is commonly known as gypsum, a mineral used in plaster and construction. Plaster of Paris, on the other hand, is calcium sulphate hemihydrate (CaSO₄·½H₂O).

Source: RRB Group D 2022 Prev. Yr. Paper (18 Aug 2022) (Shift 2) - Prepp · reliable-secondary

← Q318View full paper (598 questions)Q320 →

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