Question

Q Give
reasons
(as Making statues out of plaster of
Paris Tis an breversible and chemical
change.
B Rotation of a fam is a periodic
change.​

Answer 1

Explanation:

Making statues out of plaster of Paris is an irreversible change because plaster of Paris has a property of setting into a hard mass on getting mixed with water due to the formation of a new compound. The hard mass cannot be converted back into the previous plaster of Paris. Hence, it is an irreversible change.