Question

Discus briefly the effect of decreasing temperature and increasing pressure on a gas.

Answer 1

It will just bring the molecules of the gas closer to each other in the process liquifying the gas. This is the general method to liquefy gases which are not easily liquefiable i think.

Answer 2

It depends on the circumstances. The ideal gas law is:\[PV=nRT\]
Solving for the temperature or the pressure give the relationship things that could potentially change.\[T=PV/nR\]\[P=nRT/V\]
For example, if the volume and amount of gas are constant, the pressure will go down if you decrease the temperature. In the same scenario, the temperature must increase if the pressure increases,