In flue gas analysis by Orsat's apparatus, oxygen is absorbed by____________________?
Correct answer: A. Alkaline pyrogallol solution
- A. Alkaline pyrogallol solution
- B. Cuprous chloride
- C. Potassium hydroxide
- D. None of these
Explanation
In an Orsat analysis, alkaline pyrogallol selectively absorbs oxygen, while potassium hydroxide absorbs carbon dioxide and cuprous chloride absorbs carbon monoxide. Thus oxygen is measured using alkaline pyrogallol solution.
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