What is the product of the reaction when anhydrite undergoes hydration?

Question

Question

This question was previously asked in

SSC CHSL Exam 2023 Tier-I Official Paper (Held On: 03 Aug, 2023 Shift 1)

Answer 1

The correct answer is Gypsum. Key Points

Anhydrite is a mineral that has the chemical formula CaSO₄.
It is an anhydrous form of gypsum.
When anhydrite undergoes hydration, it reacts with water to form gypsum (CaSO₄.2H₂O).
Therefore, the product of the reaction when anhydrite undergoes hydration is gypsum.

Additional Information

Gypsum is a soft sulfate mineral that is widely used in construction as a building material.
- It is also used in agriculture, medicine, and other industries.
Limonite is a type of iron ore that is brownish-yellow in color.
- It can precipitate from surface or groundwater that is rich in iron, and it forms from the weathering of other iron minerals.
Magnesite is a mineral that has the chemical formula MgCO₃.
- The mineral was created either by the action of magnesium-containing solutions on calcite or as an alteration product from rocks rich in magnesium.
Kaolin is a type of clay mineral that is used in ceramics, paper, and other industries.
- The fine particle size, plate-like or lamellar particle shape, and chemical inertness of hydrous kaolin are its distinguishing features.