Chapter 21.3, Problem 7P

Interpretation Introduction

Interpretation: The increasing order of acidity for the labeled ${\text{CH}}_{\text{2}}$ protons is to be shown.

Concept Introduction: The most acidic hydrogen $\left(\text{H}\right)$ atom or proton is the one which can be easily eliminated from the molecule. In case of carbonyl group, the $\text{C}-\text{H}$ bond that is present on the $\alpha -\text{carbon}$ atom of carbonyl group is highly acidic as compared to $s{p}^3$ hybridized carbon-hydrogen bonds due to the formation of resonance stabilized enolate.