How should I go about answering this question?
[attachment id=0 msg=3524]

If you learn what these compounds are.
The first one is Butane or Isobutane
Second Tetrachloromethane
Third Calciumhydride
Fourth Phosporouspentoxide.

Solution is the first one  .Butane is used as cooking gas.
Tetrachlormethane is a solvent, its liquid.
Calciumhybride is a salt, and Phosphorouspentoxide is also solid at these parameters.

Quote from: ann on November 08, 2022, 11:50:39 PM
How should I go about answering this question?
[attachment id=0 msg=3524]

Please use the concept of IMF here.
The one which is non polar molecule. and with minimum molar mass will be the gas .