#SSC CHSL

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Question : What is the product of the reaction when anhydrite undergoes hydration?
Option 1: Limonite
Option 2: Magnesite
Option 3: Kaolin
Option 4: Gypsum

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Team Careers360 18th Jan, 2024

Answer (1)

Team Careers360 22nd Jan, 2024

Correct Answer: Gypsum

Solution : The correct answer is Gypsum.

When anhydrite (calcium sulfate) undergoes hydration, it forms calcium sulfate dihydrate, which is more commonly known as gypsum. The chemical reaction for this hydration process is as follows:

Anhydrite (Calcium Sulfate) + Water → Gypsum (Calcium Sulfate Dihydrate)

The product of this reaction is gypsum (CaSO ₄ ·2H ₂ O) , which is a white or colourless mineral commonly used in construction, as a soil conditioner, and for various industrial applications. Gypsum is known for its ability to set into a hard, rigid mass when mixed with water, making it valuable in construction materials like plaster, wallboard (drywall), and cement.

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