Neutral compound?

[babowc]

I'm on the Orgoman Odyssey, but ran into this problem:

So, I thought the answer would be C, considering the benzoic acid was most acidic... but the solution states compound A is neutral.

This might be a very elementary question, but how do you find out whether the compound is neutral?

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[Slumber]

I'm on the Orgoman Odyssey, but ran into this problem:

So, I thought the answer would be C, considering the benzoic acid was most acidic... but the solution states compound A is neutral.

This might be a very elementary question, but how do you find out whether the compound is neutral?

I'd rank it as C<A<B using the Cardio rule, so it should be E. You're right about C being the least basic, but A < B because A have resonance.

 

[babowc]

ah.. that makes sense, too. I overlooked resonance.

But why is compound A a neutral compound? and what makes a neutral compound?...

 

[Slumber]

ah.. that makes sense, too. I overlooked resonance.

But why is compound A a neutral compound? and what makes a neutral compound?...

Actually I don't really know. I've done a lot of practice problem and I have never came across one where I was asked to identify the neutral molecule unless it's an acid/base titration kind of problem. I personally wouldn't worry too much about it. If a question wants you to identify the neutral molecule in the your DAT, I would just rank all the choices and then choose the one in the middle. =D