Chemistry
Baking soda (NaHCO3), when added to vinegar, evolves a gas. Which of these statements is true about the evolution of gas?
I. It turns limewater milky.
II. It extinguishes the burning splinter.
III. It acts as a non-metallic oxide
IV. It has a pungent odour.
- I and IV
- I and II
- I, II and III
- III and IV
Organic Chemistry
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Answer
I, II and III
Reason — When baking soda (NaHCO3), added to vinegar (acetic acid), CO2 is evolved. CO2 turns limewater milky, extinguishes the burning splinter and acts as a non-metallic oxide.
CH3COOH + NaHCO3 ⟶ CH3COONa + H2O + CO2 ↑
CO2 has no pungent odour.
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