Consider the following molecule with protons labeled,I-III.Rank these protons in order of decreasing acidity,putting the most acidic first.
A)I II III
B)I III II
C)III II I
D)III I II

Question

Consider the following molecule with protons labeled,I-III.Rank these protons in order of decreasing acidity,putting the most acidic first. 
A)I > II > III 
B)I > III > II 
C)III > II > I 
D)III > I > II

Quizplus · Accepted Answer

The acidic hydrogen is attached to the carbon adjacent to the carbonyl group. The closer the proton is to the electronegative oxygen, the more acidic it will be. Proton III is closest to the oxygen, making it the most acidic, followed by proton II and then proton I. Therefore, the correct order of decreasing acidity is III > II > I.

Consider the Following Molecule with Protons Labeled,I-III