Q

What is used in the preparation of calcium sulphate hemihydrate?

RRB Technician Grade III, 29-Dec-24 S-2 2024
✓ Answer: B Gypsum
Gypsum is the substance used in the preparation of calcium sulphate hemihydrate. Calcium sulphate hemihydrate (CaSO4·(1/2)H2O) is the chemical name for Plaster of Paris (POP). It is produced by heating gypsum (CaSO4·2H2O) to a specific temperature of 373 K in a kiln. At this temperature, gypsum loses three-quarters of its water of crystallization to become the hemihydrate powder.
← Previous Question Next Question →

📚 Related Questions — Acid, Base and Salts

1 Common salt (NaCl) is made up of: 2 What product is formed in the chlor-alkali process? 3 ________ is the common name of sodium bicarbonate. 4 Consider the below statements and identify the correct answer. Statement-I: Anhydrous sodium… 5 If a solution turns blue litmus red, its pH is likely to… 6 What is/are the product(s) of the reaction between an acid and a…