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 term decahydrate indicates that ten water molecules are associated with each formula unit as water of crystallisation. Therefore option A is correct. Sodium hydrogen carbonate is baking soda, calcium oxychloride is bleaching powder, and sodium chloride is common salt, so each distractor names a different compound.
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 term decahydrate indicates that ten water molecules are associated with each formula unit as water of crystallisation. Therefore option A is correct. Sodium hydrogen carbonate is baking soda, calcium oxychloride is bleaching powder, and sodium chloride is common salt, so each distractor names a different compound.
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.
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