Answer:
On increasing, the the shift will be forward shift. On removing O_2, there will be no shift at all. Le Chatelier's Principle states that when a chemical system is under stress and in equilibrium, its state of balance
Le Chatelier's Principle states that when a chemical system is under stress and in equilibrium, its state of balance will change to lessen the stress. In response to a change in the temperature, concentration, quantity, or pressure, it can be used to forecast the course of a chemical reaction.
Le Chatelier's principle may be used to foretell how a system will react to a shift in equilibrium, but it cannot (at the molecular level) explain why the system will react the way it does. On increasing, the the shift will be forward shift. On removing O_2, there will be no shift at all.