Which of the following reaction will get affected by increase of pressure? Also mention, whether change will cause the reaction to go into the right or left direction?
(`i`) `CH_(4(g))+2S_(2(g))hArrCS_(2(g))+2H_(2)S_((g))`
(`ii`) `CO_(2(g))+C_((s))hArr2CO_((g))`
(`iii`) `4NH_(3(g))+5O_(2(g))hArr4NO_((g))+6H_(2)O_((g))`
(`iv`) `C_(2)H_(4(g))+H_(2(g))hArrC_(2)H_(6(g))`

Explanation

(`i`) No change.
(`ii`) Reaction goes into the left direction.
(`iii`) Reaction goes into the left direction.
(`iv`) Reaction goes into the right direction.