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Gypsum is a widely occuring mineral. It is the sulphate of calcium with two molecules of water attached. On heating, it loses three quarters of its water and becomes:
  • a)
    A pearl
  • b)
    Plaster of Paris
  • c)
    Baking soda
  • d)
    An ultramarine
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Gypsum is a widely occuring mineral. It is the sulphate of calcium wit...
Gypsum is the common name of the mineral calcium sulphate dihydrate, which is mined in various places around the world and now is also being produced in a relatively pure form as a by-product of sulphur dioxide removal processes for power station exhaust gases. On heating, dehydration of the dihydrate occurs in two distinct stages. The fairly rapid loss of three quarters of the water of crystallization at about 130 °C gives the hemihydrate. Further and now complete dehydration occurs at higher temperatures to give anhydrite. 
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Gypsum is a widely occuring mineral. It is the sulphate of calcium with two molecules of water attached. On heating, it loses three quarters of its water and becomes:a)A pearlb)Plaster of Parisc)Baking sodad)An ultramarineCorrect answer is option 'B'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Gypsum is a widely occuring mineral. It is the sulphate of calcium with two molecules of water attached. On heating, it loses three quarters of its water and becomes:a)A pearlb)Plaster of Parisc)Baking sodad)An ultramarineCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Gypsum is a widely occuring mineral. It is the sulphate of calcium with two molecules of water attached. On heating, it loses three quarters of its water and becomes:a)A pearlb)Plaster of Parisc)Baking sodad)An ultramarineCorrect answer is option 'B'. Can you explain this answer?.
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