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The table shows the boiling points of some of the gases present in air. When air is cooled to -200°C, some of these gases liquefy. Which gases liquefy?a. argon, helium, neonb. argon, nitrogen, oxygenc. helium, neon, nitrogend. helium and neon |
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Answer» ong>ANSWER: option B is correct✔. |
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