In a lab, methane and nitrogen are cooled from -170°C to -200°C. The methane freezes and the nitrogen boilscondensesmeltssublimates

At normal pressure, nitrogen boils at about −196°C. Cooling it from −170°C to −200°C takes it below that temperature, so nitrogen changes from a gas to a liquid. That change is condensation, so the correct choice is “condenses.”

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