Which is the correct matching for washing soda and baking soda?
Answer and explanation
Correct answer: Washing soda is sodium carbonate decahydrate, baking soda is sodium hydrogen carbonate
Washing soda is sodium carbonate decahydrate, Na₂CO₃·10H₂O, whereas baking soda is sodium hydrogen carbonate, NaHCO₃. The hydrate contains ten molecules of crystallisation water, while the hydrogen carbonate is a different salt with different uses. Therefore, option B is correct. Option A reverses their identities, and options C and D name unrelated salts: sodium chloride and calcium sulphate.
Frequently asked questions
What is the correct answer to this question?
Washing soda is sodium carbonate decahydrate, baking soda is sodium hydrogen carbonate
Why is this the correct answer?
Washing soda is sodium carbonate decahydrate, Na₂CO₃·10H₂O, whereas baking soda is sodium hydrogen carbonate, NaHCO₃. The hydrate contains ten molecules of crystallisation water, while the hydrogen carbonate is a different salt with different uses. Therefore, option B is correct. Option A reverses their identities, and options C and D name unrelated salts: sodium chloride and calcium sulphate.
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.
