Ethanoic acid state and Neap 2010

[H3_Internet]

Why is the ethanoic acid thing from the NEAP 2010 exam in the liquid state? As an acid, doesn't it need to be (aq) to have the suffix?

Does anyone think that Question 6 of Neap 2010 is just wrong? The answer is weird and doesn't make sense. They say adding nitrogen gas does nothing to the reaction mixture because nitrogen is inert...true...ummm...but doesn't it increase the pressure??? Is the solution wrong for this question thus the answer isn't D?

[sajib_mostofa]

If the temperature and volume of a vessel is constant, the addition of an inert gas does not change the pressure or equilibrium.

[Mao]

For an acid to behave as a bronsted-lowry acid, it has to be in a protic solvent (water )

however, this doesn't have to be the case, it can just be a pure liquid

[sajib_mostofa]

I think its only just the partial pressures that are affected since nitrogen is inert