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Per NCERT §6.10.3, in the LEWIS concept (G.N. Lewis, 1923), a base is defined as which kind of species?
AAn electron-pair acceptor
BAn electron-pair donor
CA proton acceptor
DA proton donor
Answer & Solution
Correct answer: B. An electron-pair donor
NCERT §6.10.3: Lewis — acid accepts electron pair; base donates electron pair. BF₃ + NH₃ → BF₃·NH₃ is the canonical example.
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