At Standard Pressure, which element at 25°C could undergo a change of phase when the temperature is decreased?

1.aluminum 2.chlorine 3.silicon 4.sulfur

Interesting if perhaps deceptive question! Aluminum, silicon and sulfur are all solids at 25 degrees CThat leaves only chlorine, which could turn from a gas (which it is, at 25 degrees C) to a liquid if the temperature is loweredSo the answer is option 21,3 and 4 remain solids if the temperature is lowered.

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