# NEET Chemistry Surface Chemistry Questions Solved

When ${\mathrm{FeCl}}_{3}$ solution is added to $\mathrm{NaOH}$ a negatively charged sol is obtained. It is due to the

(A) Presence of basic group

(B) Preferential adsorption of ${\mathrm{OH}}^{–}$ ions

(C) Self dissociation

(D) Electron capture by sol particles