alleryBaking soda (sodium hydrogen carbonate) has the formula:
ANa₂CO₃
BNa₂CO₃·10H₂O
CNaHCO₃
DNaOH
Answer & Solution
Correct answer: C. NaHCO₃
1. Baking soda: NaHCO₃.
2. Mildly basic; used in baking, fire extinguishers, antacids.
3. When heated: 2 NaHCO₃ → Na₂CO₃ + H₂O + CO₂ (the CO₂ makes cakes rise).
_Source: syllabus Science Ch 2 §2.4.2 Baking Soda_
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