< Why SO2 gas show non ideal behavior at room temperature but H2 shows ideal?

See below.

Explanation:

SO2 is a polar molecule and so there is interaction between molecules of the gas and  the size of the molecule is large compared with hydrogen . These 2 properties makes it show non ideal behaviour. Also hydrogen is not polar so there is little interaction between molecules.

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.