Chemistry - Complete s-block Question with Solution | TestHub

Gypsum on heating above 437 K gives anhydrous calcium sulphate as follows
$\mathrm{C}\mathrm{a}\mathrm{S}{\mathrm{O}}_4.2{\mathrm{H}}_2\mathrm{O}\stackrel{390\mathrm{K}}{\to }\mathrm{C}\mathrm{a}\mathrm{S}{\mathrm{O}}_4.5{\mathrm{H}}_2\mathrm{O}\stackrel{\mathrm{A}\mathrm{b}\mathrm{o}\mathrm{v}\mathrm{e}}{\to }\mathrm{C}\mathrm{a}\mathrm{S}{\mathrm{O}}_4$