What is the chemical name of washing soda?
Answer and explanation
Correct answer: Sodium carbonate decahydrate
The governing concept is the relationship between a salt’s common name, chemical name, and water of crystallisation. Washing soda is sodium carbonate decahydrate, Na₂CO₃·10H₂O. The ten water molecules are part of its crystalline structure, so it is called a decahydrate. Hence option C is correct. Sodium chloride is common salt, sodium hydrogen carbonate is baking soda, and calcium sulphate hemihydrate is plaster of Paris.
Frequently asked questions
What is the correct answer to this question?
Sodium carbonate decahydrate
Why is this the correct answer?
The governing concept is the relationship between a salt’s common name, chemical name, and water of crystallisation. Washing soda is sodium carbonate decahydrate, Na₂CO₃·10H₂O. The ten water molecules are part of its crystalline structure, so it is called a decahydrate. Hence option C is correct. Sodium chloride is common salt, sodium hydrogen carbonate is baking soda, and calcium sulphate hemihydrate is plaster of Paris.
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.
