Chemistry
Grade-10
Easy
Question
Which of the following substance is used in the fire-extinguisher?
- Washing soda
- Bleaching powder
- Baking soda
- Lime water
Hint:
When baking soda is heated it releases carbon dioxide.
The correct answer is: Baking soda
- The chemical formula of baking soda is sodium hydrogen carbonate.
- For extinguishing fire we need carbon dioxide gas.
- When baking soda is heated it releases carbon dioxide.
2NaHCO3 
Na2CO3 + CO2 + H2O
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