The number of water molecules in gypsum, dead burnt plaster and plaster of Paris, respectively are :
Solution
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<td>Gypsum</td>
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<td>$CaS{O_4}.2{H_2}O$</td>
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<td>Plaster of Paris</td>
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<td>$CaS{O_4}.{1 \over 2}{H_2}O$</td>
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<td>Dead burnt plaster</td>
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<td>$CaS{O_4}$</td>
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About this question
Subject: Chemistry · Chapter: s-Block Elements · Topic: Alkali Metals
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