i. Adding CH4 : Adding CH4 will favour the forward reaction and the yield of CO and H2 will increase
ii. Adding H2 : Adding H2 will favour the reverse reaction and the yield of CO and H2 will decrease.
iii. Removing H2O: Removing H2O will favour the reverse reaction and the yield of CO and H2 will decrease.
iv. Removing H2 : Removing H2 will favour the forward reaction and the yield of CO and H2 will increase.