What is the chemical name of plaster of Paris?
Answer and explanation
Correct answer: Calcium sulphate hemihydrate
Plaster of Paris is prepared by partially heating gypsum, whose formula is CaSO₄·2H₂O. Partial dehydration removes one and a half water molecules, producing CaSO₄·½H₂O, called calcium sulphate hemihydrate. Calcium carbonate, sodium carbonate decahydrate, and sodium chloride are different salts, so option C is correct.
Frequently asked questions
What is the correct answer to this question?
Calcium sulphate hemihydrate
Why is this the correct answer?
Plaster of Paris is prepared by partially heating gypsum, whose formula is CaSO₄·2H₂O. Partial dehydration removes one and a half water molecules, producing CaSO₄·½H₂O, called calcium sulphate hemihydrate. Calcium carbonate, sodium carbonate decahydrate, and sodium chloride are different salts, so option C is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
