Which of the following is Lewis acid?
Correct answer: D. All of these
- A. AlCl₃
- B. Ag⁺
- C. BCl₃
- D. All of these
Explanation
The correct answer is 'All of these' because AlCl₃, Ag⁺, and BCl₃ all function as Lewis acids. A Lewis acid is defined as a chemical species that can accept an electron pair. AlCl₃ and BCl₃ have central atoms (Al and B, respectively) that can accept electron pairs due to incomplete octets. Ag⁺, being a positively charged ion, can also accept electron pairs. Thus, all these species can act as Lewis acids.
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About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
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