Chemistry - GOC Question with Solution | TestHub

Removing H₁ puts the negative charge on nitrogen :

Removing H₂ puts the negative charge on oxygen :

Nitrogen and oxygen are in the same period, so the deciding factor is electronegativity. Oxygen is more electronegative than nitrogen and stabilises the negative charge better, so the alkoxide is the more stable conjugate base. The O-H proton H₂ is more acidic.