Multiple choice general knowledge

'gypsum' actually is -

  1. sodium silicate

  2. calcium sulfate

  3. zinc sulfate

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

Gypsum is calcium sulfate dihydrate (CaSO4·2H2O), a soft sulfate mineral used extensively in construction materials like drywall and plaster. When heated, it loses water to become plaster of Paris. It's distinct from calcium carbonate (limestone) which doesn't contain sulfate.

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