What is the chemical name of plaster of Paris?
Answer and explanation
Correct answer: Calcium sulphate hemihydrate
Plaster of Paris is the partially dehydrated form of gypsum. Gypsum has the formula CaSO4·2H2O, whereas controlled heating produces CaSO4·½H2O. This compound is called calcium sulphate hemihydrate, so option A is correct. Calcium carbonate is limestone or chalk, sodium carbonate decahydrate is washing soda, and sodium chloride is common salt.
Frequently asked questions
What is the correct answer to this question?
Calcium sulphate hemihydrate
Why is this the correct answer?
Plaster of Paris is the partially dehydrated form of gypsum. Gypsum has the formula CaSO4·2H2O, whereas controlled heating produces CaSO4·½H2O. This compound is called calcium sulphate hemihydrate, so option A is correct. Calcium carbonate is limestone or chalk, sodium carbonate decahydrate is washing soda, and sodium chloride is common salt.
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.
