The correct answer is Plaster of Paris.
Key Points
- Plaster of Paris is the generic name of calcium sulphate hemihydrate-CaSO4. 1/2H2O.
- Plaster of Paris is manufactured by heating gypsum at 423K or 150o C/300o F.
- On heating gypsum at 423 K, it loses water molecules and becomes calcium sulfate hemihydrate. This product is known as the plaster of Paris.
Important Points
- Application of Plaster of Paris-
- It is used as a building material as a protective coating on walls and ceilings.
- It is used as a moulding and vesting agent for decorative elements.
- It is also used for aesthetic touch to the construction elements.
- It is also field as plaster in orthopedics and as a filling material by dentists, etc.
Additional Information
- Baking soda is also known as sodium bicarbonate or bicarbonate of soda.
- Vinegar is also known as acetic acid. It typically contains 5–8% acetic acid by volume.
- Washing soda is a chemical compound with the formula Na2CO3, also known as sodium carbonate.