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Per NCERT §4.4, the VSEPR theory (Sidgwick-Powell 1940; refined by Nyholm-Gillespie 1957) predicts molecular shape from what?
AThe colour of the compound
BThe atomic number alone
CThe mass of the central atom
DThe number of valence-shell electron PAIRS (bonded + non-bonded) around the central atom, repelling and maximising distance
Answer & Solution
Correct answer: D. The number of valence-shell electron PAIRS (bonded + non-bonded) around the central atom, repelling and maximising distance
Per NCERT §4.4, VSEPR: e⁻ pairs around central atom repel + adopt arrangement that maximises distance. Lone pairs repel more than bond pairs.
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