Sample 1Easy
Which of the following is a Lewis acid?
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The answer is C.
A Lewis acid accepts an electron pair. BF3 has an electron-deficient boron and accepts a lone pair, for example from NH3.
- A.
NH3 donates its lone pair, so it is a Lewis base.
- B.
H2O donates a lone pair on oxygen, so it acts as a Lewis base.
- D.
OH⁻ donates an electron pair, so it is a Lewis base.
NCERT: Class 11 Chemistry, Unit 6 (Equilibrium), Lewis Acids and Bases