Which set of products is correct when baking soda is heated?
Answer and explanation
Correct answer: Sodium carbonate, carbon dioxide, and water
Baking soda is sodium hydrogen carbonate, NaHCO3. On heating, it undergoes thermal decomposition: 2NaHCO3 → Na2CO3 + CO2 + H2O. The products are therefore sodium carbonate, carbon dioxide and water, exactly as stated in option A. The other options contain substances that are not formed in this decomposition and do not balance the reaction.
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What is the correct answer to this question?
Sodium carbonate, carbon dioxide, and water
Why is this the correct answer?
Baking soda is sodium hydrogen carbonate, NaHCO3. On heating, it undergoes thermal decomposition: 2NaHCO3 → Na2CO3 + CO2 + H2O. The products are therefore sodium carbonate, carbon dioxide and water, exactly as stated in option A. The other options contain substances that are not formed in this decomposition and do not balance the reaction.
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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