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Q.

What is the formula of plaster of paris?


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a

  Question Image 

b

  Question Image

c

  Question Image

d

  Question Image

answer is A.

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Detailed Solution

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Concept- Gypsum is typically calcined to produce plaster of Paris, a white, powdery chemical substance that is hydrated calcium sulphate. In other terms, we can state that gypsum is typically heated to a high temperature and then used to make plaster of paris. Gypsum plaster is a term that is often used for plaster of paris.
Question Imageis the chemical formula for plaster of paris and gypsum is Question ImagePlaster of Paris is calcium sulphate that has half a molecule of water for every molecule of salt (hemihydrate).
Gypsum is used to make it and is heated in rotating kilns to 120°C, where it partially dehydrates.
Hence, the correct answer is option 1.
 
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