Nitrogen present in the flue gas is determined in the Orsat apparatus by absorbing it in_____________________?
Correct answer: D. None of these
- A. KOH
- B. Ammoniacal cuprous chloride
- C. Pyrogallol solution
- D. None of these
Explanation
An Orsat apparatus absorbs carbon dioxide with KOH, oxygen with alkaline pyrogallol, and carbon monoxide with ammoniacal cuprous chloride. Nitrogen is not absorbed; it is obtained by difference, so none of the listed absorbents is correct.
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