Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic ?
Correct answer: A. CO2
- A. CO2
- B. O2
- C. NO
- D. NO2
Explanation
CO₂ is diamagnetic because all its electrons are paired. O₂, NO, and NO₂ have unpaired electrons and are paramagnetic, so they are attracted toward a strong magnetic field.
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