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MHT CET Medical202626 April 2026Morning ShiftChemistryIonic EquilibriumActual

Which from the following is Lewis base?

Options

  1. AAlCl ₃
  2. BBF ₃
  3. CH ₂ O
  4. DH ^+

Correct answer

C. H ₂ O

Step-by-step solution

A Lewis base is a chemical species that can donate a pair of non-bonding electrons. AlCl ₃ and BF ₃ are electron-deficient molecules, as the central atoms (Al and B) have incomplete octets. They accept electron pairs and act as Lewis acids. H ^+ is a proton with no electrons, so it accepts an electron pair and acts as a Lewis acid. In H ₂ O , the oxygen atom has two lone pairs of electrons that it can donate. Therefore, H ₂ O acts as a Lewis base. Answer: H ₂ O

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