Match the following :
`{:("Column I(Assume only reactant were present initially)","Column II"),((A)"For the equilibrium" NH_4I(s)hArr NH_3(g)+HI(g)",""If pressure is increased at equilibrium",(p)"Forward shift"),((B)"For the equilibrium" N_2(g)+3H_2(g)hArr 2NH_3(g)"volume is increased at equilibrium",(q)"No shift in equilibrium"),((C )"For the equilibrium" H_2O(g)+CO(g)hArr H_2(g)+CO_2(g)"inert gas is added at constant pressure at equilibrium",(r)"Backward shift"),((D)"For the equilibrium" PCl_5hArr PCl_3+Cl_2 Cl_2"is removed at equilibrium",(s)"Final pressure is more than initial pressure "):}`

Answer

A-r ; B-r ; C-q ; D-p

Explanation

(A)`Deltan_(g)` is +ve so as P is increased, backward shifting will take place.Total pressure even after shifting will remain same.
(B)`Deltan_g` is -ve so as V is increased, backward shifting will take place. But `P_("final")ltP_("Initial")`
( C)No change but `P_("final")ltP_("Initial")` as volume has increased.
(D)Forward shifting will take place and `P_("final")ltP_("Initial")`