Question

A WHITE POWDERY SUBSTANCE 'X' IMMEDIATELY SETS INTO HARD MASS ON ADDING A LIQUID 'Y' TO IT . IN HOSPITALS A THICK COAT OF THE PASTE OF THE SUBSTANCE X IS APPLIED OVER THE BANDAGE ON THE FRACTURED BONE OF A PATIENT TO KEEP THE FRACTURED BONE IN PLACE TO GET JOINED PROPERLY.WHAT COULD BE SUBSTANCE X AND Y . WHAT TYPE OF CHANGE OCCURS IN X ON ADDING Y?????

Answer 1

If it is helpful plzz mark as brainleist

Answer 2

X is Plaster of Paris or Calcium Hemihydrate (CaSO4.1/2H2O).

Y is Water(H2O).

On adding Y to X, X hardens to form a solid mass called Gypsum or Calcium Dihydrate(CaSO4.2H2O).

Reaction:

CaSO4.1/2H2O + 3/2H2O -> CaSO4.2H2O.