Chemistry - CHEMICAL BONDING Question with Solution | TestHub

Statement (B): R₃Si-OH is more acidic than R₃C-OH because oxygen's lone pair can undergo pπ-dπ back bonding into the empty d-orbitals of Silicon, weakening the O-H bond.

Statement (C): Back bonding is actually possible in CO (from filled p-orbitals of Oxygen to empty p-orbitals of Carbon); it's not restricted to BF₃.

Statement (D): NH₃ is more basic than PH₃ because Nitrogen is smaller and has a higher electron density, making its lone pair more available for donation.

Statement (A) is Correct: CHCl₃ is more acidic than CHF₃ because the CCl₃⁻ ion is stabilized by d-orbital resonance (back bonding) with Chlorine, which Fluorine lacks.