The hydrogen atom bonded to the carbon designated by which number in $\stackrel{4}{\mathrm{C}}…
The hydrogen atom bonded to the carbon designated by which number in $\stackrel{4}{\mathrm{C}} \mathrm{H}_3-\stackrel{3}{\mathrm{C}} \mathrm{H}_2-\stackrel{2}{\mathrm{C}} \mathrm{H}_2-\stackrel{1}{\mathrm{C}} \mathrm{HO}$ is most acidic.
$C-4$
$C-2$
$C-3$
$C-1$
Solution
Hydrogen C-2 is more acidic because associated with the carbonyl group.