When a solid turns to gas it is called sublimation, and when a gas turns into a liquid it is called deposition
The last one would be false
Hey I tried but could not find your answer, but maybe you could try to calculate the average of bpts of the different elements in the compound to find the boiling point. And when you know the bpt, you can find out whether it is a liquid or gas. But after searching a lot, I found it was a solid. Good luck!
