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प्रश्न
Formula of Gypsum is
विकल्प
\[\ce{CaSO4.2H2O}\]
\[\ce{CaSO4.1/2H2O}\]
\[\ce{3CaSO4.H2O}\]
\[\ce{2CaSO4.2H2O}\]
उत्तर
\[\ce{CaSO4.2H2O}\]
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