Question

why is setting of plaster of paida(pop)an irreversible change.Give its Two uses.​

Answer 1

Answer:

irreversible because it can't change once again

• It is used in making toys, materials for decoration and for making smooth surfaces.

• It is used in surgical bandages by doctors for supporting fractured bones in the right position.

• It is used in making casts of statues, molds for pottery and ceramics. It is also used in building material.  

• It is used in dentistry.  

Explanation:

Answer 2

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.