Will this reaction shifts towards left or right 2SO2 (g) <-------> 2SO2 (g) + O2 (g) when we remove the SO2 ?

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Explanation: 

The SO2 is a reactant , removing a reactant will shift the reaction towards the left so that more reactant can be formed and thus the equilibrium can be restablished.

Answer: 

Removing the SO2 a reactant will shift the reaction towards the left side to produce more reactant.