Multiple choice

The chemical name of gypsum is ________.

  1. calcium chloride

  2. calcium sulphate

  3. calcium bromide

  4. calcium fluoride
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gypsum is calcium sulphate dihydrate (CaSO4·2H2O). It's a soft sulfate mineral used in plaster, wallboard, and fertilizer.

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