JAMB - Chemistry (2002 - No. 5)
In the reaction E+F ↔ G+H, the backward reaction is favoured if the concentration of
F is increased
E is increased
E is reduced
G is reduced
Explication
Le Chatelier's principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change to reestablish an equilibrium.
For the backward reaction to be favoured(LHS) , the concentration of one of the reactants must be reduced. i.e either E or F must be reduced. However, from the option, option C happens to be the one that fits in, as E is the only reactant reduced.