Acidity to Reactivity

[xjoey20x]

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I know the answer to this one is A.

Is acidity inversely related to acidity.

Since acids are the stable, I am assuming that weak acids will react faster.

Is this logic correct?

So reactivity would go 3,4,2,1 right?

 

[aldol16]

Reactivity depends on reaction. You can't talk about reactivity without having a reaction. For instance, in an acid-base reaction, I would be most reactive. For reactivity at the carbon attached to the heteroatom, I would also be the most reactive because it has the more electronegative atom attached via double bond to a carbon, rendering that carbon very electrophilic. The formation of the acid activates the carbonyl, making it more reactive by increasing the positive charge on the carbon (draw resonance form).