Answer
Please see the answer below.
Work Step by Step
According to Le Chatelier's principle, If a system at equilibrium is subjected to any change, then the system adjusts the forward and backward reactions in such a way to accept the changes affecting the equilibrium conditions.
Thus in the given equilibrium,
a) The addition of $Cl_{2}(g)$ shifts the position of equilibrium to the right.
b)The removal of $SO_{2}Cl_{2}(g)$ shifts the position of equilibrium to the right.
c) The removal of $SO_{2}(g)$ shifts the position of equilibrium to the left.
