Alcohols can form non$-$covalent hydrogen bonds. These hydrogen bonds affect the covalent $O-H$ bonds.

hydrogen bond

a$)$ Will the $OH$ group with the weaker covalent bond absorb at the same or different frequency as the normal covalent bond $($Hint: think springs$)?$ Explain.

b$)$ In a solution, if the lengths of the hydrogen bonds vary causing the strengths of the covalent bonds to vary, what will happen to the frequencies adsorbed by the covalent $O-H$ bonds?

c$)$ Use your answer to $2b$ to explain why the $O-H$ peak looks different compared to other peaks.