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NTA Abhyas JEE Main2020Chemistrys Block ElementsPractice

Identify the correct statement

Options

  1. AGypsum contains a lower percentage of calcium than plaster of paris
  2. BGypsum is obtained by heating plaster of paris
  3. CPlaster of paris can be obtained by hydration of gypsum
  4. DNone of these

Correct answer

A. Gypsum contains a lower percentage of calcium than plaster of paris

Step-by-step solution

Gypsum is 2 CaSO 4 · 2 H 2 O Plaster of paris is CaSO 4 · 1 2 H 2 O Hence, Gypsum contains a lower percentage of calcium than plaster of paris.

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