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On strong heating, baking soda gives sodium carbonate, water and
Acarbon dioxide
Bsulphur dioxide
Chydrogen gas only
Dwater vapour only
Answer & Solution
Correct answer: A. carbon dioxide
1. Heating decomposes baking soda: 2NaHCO3 gives Na2CO3 + H2O + CO2.
2. The carbon dioxide makes cakes and bread rise and become spongy.
3. So the third product is carbon dioxide.
_Source: AP/TS SCERT Class 10 Physical Science, "Acids, Bases and Salts"_
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