What is the chemical name of washing soda?
Answer and explanation
Correct answer: Sodium carbonate decahydrate
Washing soda is sodium carbonate decahydrate, written as Na₂CO₃·10H₂O. The ten water molecules are called water of crystallisation, so option C is correct. Sodium hydrogen carbonate, NaHCO₃, is baking soda; sodium chloride is common salt; and calcium sulphate hemihydrate is plaster of Paris. These distinctions are based on the chemical composition and names of the salts.
Frequently asked questions
What is the correct answer to this question?
Sodium carbonate decahydrate
Why is this the correct answer?
Washing soda is sodium carbonate decahydrate, written as Na₂CO₃·10H₂O. The ten water molecules are called water of crystallisation, so option C is correct. Sodium hydrogen carbonate, NaHCO₃, is baking soda; sodium chloride is common salt; and calcium sulphate hemihydrate is plaster of Paris. These distinctions are based on the chemical composition and names of the salts.
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.
