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Statement - I : Setting of plaster of Paris involves hydration.
Statement - II : Plaster of Paris is obtained by heating gypsum to 200^oC.

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Both statement I and II are incorrect

Statement I and II are correct and II explains I

Statement I and II are correct and II does not explain I

Statement I is correct and Statement II is incorrect

answer is C.

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Detailed Solution

The setting of plaster of paris is due to rehydration[hydration] and its reconversion into gypsum

large mathop {CaS{O_4}.frac{1}{2}{H_2}O}limits_{P.O.P} ; + ;frac{3}{2}{H_2}O;xrightarrow{{setting}};mathop {CaS{O_4}.2{H_2}O}limits_{Gypsum}

large mathop {2CaS{O_4}.2{H_2}O}limits_{Gypsum} ;xrightarrow{{;;120^circ C}};mathop {mathop {2CaS{O_4}.frac{1}{2}{H_2}O}limits_{Plaster;of;pairs} }limits_{left[ {P.O.P} right]} ; + ;frac{3}{2}{H_2}O

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