Answer
The OH group proton in case of propan-1-ol shows peak around 4.7 ppm, while it is shifted to around 11.0 ppm in case of propanoic acid.
The CH2 group splitting next to OH group of aldehyde is absent in the spectrum of propanoic acid, as the protons are removed due to oxidation.
Work Step by Step
The shifting of OH proton in case of propanoic acid compare to propan-1-ol is due to deshielding effect as COOH is electron withdrawing group, which is attributed to the electron withdrawing nature of C=O group.
The figure contains the spectrum of propan-1-ol (A) and propanoic acid (B) as inlet figure.
