MCQ practice · SSC Chemistry Board questions · Chapter 12: Chemistry in Our Lives
The formula of soda ash is-
Think it through first, then pick an option.
- a CaO
- b Na₂CO₃
- c CaCO₃
- d NaHCO₃
Answer and explanation
Correct answer: b Na₂CO₃
Sodium carbonate (Na₂CO₃) is called soda ash.
Why the other options are wrong
- a CaO: CaO is calcium oxide, used to make ammonia. Soda ash is Na₂CO₃.
- c CaCO₃: CaCO₃ is limestone, a calcium salt; soda ash is the sodium salt Na₂CO₃.
- d NaHCO₃: NaHCO₃ is baking or table soda; soda ash is Na₂CO₃.
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