Which pair shows the correct common name and chemical name?
Answer and explanation
Correct answer: Washing soda and sodium carbonate decahydrate
Washing soda is sodium carbonate decahydrate, with the formula Na₂CO₃·10H₂O; hence option A gives a correct common-name and chemical-name pair. Baking soda is sodium hydrogen carbonate, bleaching powder is not sodium chloride, and Plaster of Paris is calcium sulphate hemihydrate rather than calcium carbonate. These comparisons eliminate B, C, and D and confirm A unambiguously.
Frequently asked questions
What is the correct answer to this question?
Washing soda and sodium carbonate decahydrate
Why is this the correct answer?
Washing soda is sodium carbonate decahydrate, with the formula Na₂CO₃·10H₂O; hence option A gives a correct common-name and chemical-name pair. Baking soda is sodium hydrogen carbonate, bleaching powder is not sodium chloride, and Plaster of Paris is calcium sulphate hemihydrate rather than calcium carbonate. These comparisons eliminate B, C, and D and confirm A unambiguously.
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.
