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6.2. Equilibrium - II (icon Equilibrium) — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry6.2. Equilibrium - II (icon Equilibrium)1 Mark
MCQ
According to Lewis concept, an acid is a substance which
  • A
    Accepts protons
  • B
    Donates protons
  • ✓
    Accepts a lone pair of electrons
  • D
    Donates a lone pair of electrons
✓

Answer

Correct option: C.
Accepts a lone pair of electrons
c
Lewis theory of acid-base reactions, bases donate pairs of electrons and acids accept pairs of electrons. A Lewis acid is, therefore, any substance, such as the $H ^{+}$ ion, that can accept a pair of nonbonding electrons. In other words, a Lewis acid is an electron-pair acceptor.

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