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  4. When gypsum is heated to 393 K, it forms:

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Q. When gypsum is heated to $393\, K$, it forms:

JEE MainJEE Main 2020The s-Block Elements

Solution:

$\underset{\text{Gypsum}}{CaSO_4}.2H_2O\xrightarrow{393\,K} \underset{\text{Plaster of paris}}{CaSO_4.\frac{1}{2}H_2O}+\frac{3}{2}H_2O$