Which of the following is Lewis acid?
Correct answer: D. All of these
- A. FeCl₃
- B. AlCl₃
- C. BF3
- D. All of these
Explanation
The correct answer is All of these because all the compounds listed (FeCl₃, AlCl₃, and BF3) are Lewis acids. A Lewis acid is defined as a substance that can accept a pair of electrons to form a covalent bond. In FeCl₃, the iron atom is electron-deficient and can accept an electron pair. Similarly, AlCl₃ has an electron-deficient aluminum atom that can accept an electron pair, and BF3 has a boron atom with an incomplete octet, making it capable of accepting an electron pair. Therefore, each of these compounds can act as a Lewis acid.
Last updated
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.
Practise Acids, Bases and Salts
314 free Acids, Bases and Salts MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
All of the following are postulates of Arrhenius theory of ionization except
Which of the following aqueous solution will be basic?
A start of reaction, concentration of reactants are on
An acid that can act as an oxidizing, dehydrating and acid-producing agent is
Which of the following compounds is the strongest Bronsted acid