MDCAT Chemistry MCQ #4319

Which gas forms a solid (dry ice) directly under pressure at room temperature without passing through a liquid phase?

MDCAT Chemistry MCQ #4319

  1. Question 1

    Q1. Which gas forms a solid (dry ice) directly under pressure at room temperature without passing through a liquid phase?

    • A) NH3
    • B) CO2
    • C) SO2
    • D) CH4

    Answer: CO2

    Explanation: CO2’s sublimation at 1 atm is due to its phase diagram. NH3 liquefies before solidifying.