Question

6. Doctors apply a thick coat of plaster of Paris (POP) over the bandage on a fractured bone.
POP becomes hard on drying and keeps the fractured bone immobilised. Is it a reversible
change?
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Answer 1

Answer

No

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Answer 2

Answer: NO

Explanation:  It is because when we add water in POP , it undergoes a      

                       chemical change .