Question

Which gas turns solid while heating?

Answer 1

A gas can't be changed into solid but ...
Cyclodextrines are cyclic structures containing hydroxyl end groups that can form hydrogen bonds with either the 4MP or water molecules. At room temperature, up to 300 grams of αCD can be dissolved in a litre of 4MP. The resulting solution is homogenous and transparent, but it becomes a milky-white solidwhen heated.
They are things which are liquid and they change gas at heating..

Answer 2

gas turn into solid in deposition