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Question: Answered & Verified by Expert
What happens to gypsum (CaSO4·2H2O) when it is heated to 393 K?
Chemistrys Block ElementsNEET
Options:
  • A It melts
  • B It decomposes to form anhydrous calcium sulfate
  • C It forms calcium sulfate dihydrate
  • D It remains unchanged
Solution:
1626 Upvotes Verified Answer
The correct answer is: It decomposes to form anhydrous calcium sulfate
When gypsum is heated to 393 K, it loses water of crystallization and forms anhydrous calcium sulfate (CaSO4).

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