Which part(s) of the reaction

2O3(g) <---> 3O2(g)
will be favored by an increase in the total pressure (resulting in compression)?

2. Neither is favored.
3. Unable to determine
4. reactants

1 answer

What does "which part(s) of the reaction" mean?
An increase in P will cause it to shift to the left; thus, O2 will decrease and O3 will increase. I suppose that means 3 is the answer?