Solved UPSC CDS/OTA Question
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Q · Mineralsmedium · 45s
Gypsum is primarily composed of:
TopicMinerals
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Gypsum consists of hydrated calcium sulfate (CaSO₄·2H₂O) and is characterized by its softness (hardness 2 on Mohs scale) and white to transparent appearance. It forms through evaporation of sulfate-rich water in sedimentary environments. Gypsum is extensively used in construction for wallboard, plaster, and cement production due to its ability to harden when mixed with water.
Final Answer: Option B - Calcium sulfate