bootcamp question orgo

[Dental2000]

27. Which of the following is the LEAST acidic?

a) b) c) d) e)





I picked e) but answer is c). My thinking is that -NO2 is an electron

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[Dental2000]

Never Mind I figured out what I was doing wrong.

 

[belmont3]

Acidity increases across a period from left to right as electronegativity increases.
Acidity increases down a group as atomic radii increase