Concept:VSEPR theory states that the geometry of a molecule is determined by the total repulsion between
all electron pairs (both bonding and non-bonding) in the valence shell.
Formula:$$ \text{Total Domains} = \text{Bond Pairs (BP)} + \text{Lone Pairs (LP)} $$
Solution:- VSEPR fundamentally relies on the fact that Bond Pairs (BP) and Lone Pairs (LP) both take up space and repel each other.
- Option D claims that only lone pairs determine geometry, completely ignoring the bond pairs that form the actual physical structure of the molecule. This is factually incorrect and violates the core premise of VSEPR.
Why other options are incorrect:- Option A & Option B: These are the foundational axioms of VSEPR theory.
- Option C: Knowing molecular shape (via VSEPR) is crucial for lock-and-key receptor binding in pharmacology.
Quality & Fidelity Assurance:
Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.