Which of the changes listed will shift the equilibrium to the right for the following reversible re

1. Increasing CH4 shifts equilibrium to right according to Le Chatelier's principle. When you increase the concentration of a reactant, the system will react by using up the additional substance by shifting the equilibrium point toward the product side (to the right).

2.  increase volume Increasing the volume of the reaction chamber, decreases the pressure of the system. Since all the substances in the equilibrium system are gases, and the number of molecules of reactants is (1 + 1 = 2), while the number of molecules of the products is (1 + 3 = 4), the system will shift in the direction of the larger number of molecules or to the right.

3.  decrease [CO] When the concentration of carbon monoxide is decreased, the system will try to produce more of it by shifting the equilibrium system to the right.

4. increase temperature
Increasing the temperature is accomplished by adding heat to the system. When that happens, the system will try to reduce the amount of heat by shifting towards the products (to the right).

Answer is  all of these