Question

6. A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage
on a fractured bone. It becomes hard on drying to keep the fractured bone
immobilised. Can the change in POP be reversed?
7. A bag of cement lying in the open gets wet due to rain during the night. The
next day the sun shines brightly, Do you think the changes, which have occurred
in the cement, could be reversed?​

Answer 1

ANS 6. A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilised. ... No, the change in plaster of Paris cannot be reversed. When water is added to POP, it undergoes a chemical change.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

ANS 7. No, the changes which have occurred in the cement cannot be reversed because it is a irreversible chemical change.

____________________

I HOPE THIS WILL HELP YOU... PLEASE MARK AS BRAINLIST... FOLLOW ME TOO....

Answer 2

Answer:

Explanation:

thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilised. Can the change in POP be reversed? Answer: This is an example of chemical change which cannot be reversed by using simple physical means.