Question

\[\ce{Y <-[\Delta, 205°C] CaSO4.2H2O ->[\Delta, 120°C] X}\]

X and Y are respectively:

Options

• plaster of paris, dead burnt plaster

• dead burnt plaster, plaster of paris

• CaO and plaster of paris

• plaster of paris, mixture of gases

Answer 1

plaster of paris, dead burnt plaster

Explanation:

\[\ce{\underset{(Y)}{CaSO4} <-[\Delta, 205°C] CaSO4.2H2O ->[\Delta, 120°C] \underset{(X)}{\underset{Plaster of paris}{CaSO4 1/2 H2O}}}\]