Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about ______________ °C ?
Correct answer: B. -183
- A. -83
- B. -183
- C. -196
- D. -218
Explanation
Liquid oxygen boils at about −183°C at atmospheric pressure. Nitrogen boils at −196°C, so that value is the common distractor in air-separation questions.
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