Match the following :
Condition for the reaction to be favoured in forward direction

Explanation

[A - P, S] [B - P, S] [C - Q, R] [D - Q]
We have to determine the conditions favourable for system to move in forward direction.
Note : Low temperature favours the reactions to move in exothermic directions i.e., where heat is evolved
High temperature favours the reactions to move in endothermic directions i.e., where heat is absorbed. Low pressure shifts the reaction in a direction where there is an increase in number of gaseous moles (`Deltang > 0`) . High pressure shifts the reaction in a direction where there is decrease in number of gaseous moles (`Deltang < 0`)
(A) The reaction is exothermic, which means at low temperature, it will shift to forward direction (P). There is a decrease in number of moles (gaseous) in the forward direction (`Deltang < 0`) so at high pressure, the reaction will shift in forward direction (S).
(B) Same as (A), since the reaction is exothermic and decrease in number of moles in forward direction.
(C) The reaction is endothermic which means at high temperature, it will shift to forward direction (Q). There is an increase in number of moles in forward direction, so at low pressure, the reaction will shift in forward direction (R).
(D) The reaction is endothermic which means at high temperature, it will shift to forward direction (Q). Note that, so no effect of change in pressure as