Question

Question #a394c

Answer 1

There are more than one method that would work

Explanation:

(1) Removing the `C_2H_4Cl_2` would certainly shift the equilibrium to the right.

(2) Adding `Cl_2` would do the same.

(3) Lowering the temperature would also be an option, as the reaction is exothermic. Downside of this, is that the reaction will be slower, and it will take more time to reach the new equilibrium.

(4) Increasing the volume will shift the equilibrium to the left, as the left side contains more molecules. Pressurizing would do the opposite, and that is what we want.

These are all examples of the 'law' that says that the equilibrium will shift in such a way as to minimize the effect of the cause of the shift.
https://en.wikipedia.org/wiki/Le_Chatelier%27s_principle