Multiple choice general knowledge science & technology

Calcium sulphate is commonly called

  1. Coaltar

  2. Bruster

  3. Rubidium

  4. Plaster of Paris
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Calcium sulfate (CaSO4) when partially dehydrated forms Plaster of Paris, named after large gypsum deposits near Paris. This is a standard chemistry fact about common compounds and their commercial names. Coaltar is a coal byproduct, Rubidium is an element, and Bruster appears to be a fictional option.

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