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MHT CET Medical202621 April 2026Morning ShiftChemistryIonic EquilibriumActual

Identify from following an example of Lewis acid.

Options

  1. AH ₂ SO ₄
  2. BHClO ₄
  3. CCH ₃ COOH
  4. DBF ₃

Correct answer

D. BF ₃

Step-by-step solution

A Lewis acid is a chemical species that can accept a pair of electrons. In boron trifluoride ( BF ₃ ), the central boron atom has only six electrons in its valence shell, making it an electron-deficient molecule. Due to this incomplete octet, BF ₃ can accept an electron pair to complete its octet, thus acting as a Lewis acid. H ₂ SO ₄ , HClO ₄ , and CH ₃ COOH are Bronsted-Lowry acids as they donate protons ( H ^+ ). Answer: BF ₃

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