Statemenr-I: Acidic strength of  ${\mathrm{RCH}}_2\mathrm{OH}>{\mathrm{R}}_2\mathrm{CHOH}>{\mathrm{R}}_3\mathrm{COH}$

Statemenr-II: Stability of  ${\mathrm{RCH}}_2{\mathrm{O}}^{-}>{\mathrm{R}}_2{\mathrm{CHO}}^{-}>{\mathrm{R}}_3{\mathrm{CO}}^{-}$

Alkyl groups are electron donating groups. As the number of –R groups increases negative charge accumulation increases, stability decreases.

Acidic strength of R-CH₂OH>R₂CHOH>R₃COH