In flue gas analysis by Orsat's apparatus, carbon dioxide is absorbed by______________________?
Correct answer: A. Potassium hydroxide
- A. Potassium hydroxide
- B. Dilute potassium carbonate
- C. Cuprous chloride
- D. Alkaline pyrogallol solution
Explanation
Potassium hydroxide absorbs CO₂ in Orsat analysis by reacting with the acidic oxide to form potassium carbonate. Cuprous chloride absorbs CO, while alkaline pyrogallol absorbs oxygen.
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