Question

Is $\mathrm{OH}$ group electron donating or withdrawing?

Answer 1

1. In $\mathrm{OH}$, oxygen has 6 electron in its outermost orbital and one of then is form a bond with a hydrogen atom and still have 2 lone pair of electrons.
2. $\mathrm{OH}$ can easily donate its electron in increasing the electron density in ortho and para position.

Hence, $\mathrm{OH}$ is an electron-donating group.