Q. Which of these is a Lewis acid?
A) $AlCl_{3}$
B) $NCl_{3}$
C) $HCl$
D) $ROR$
Explanation
(a)
Lewis acids are those species which can accept a lone pair of electron. $BF_{3},AlCl_{3},{SnCl}_{4},{FeCl}_{3}$ etc. are Lewis acids. $NCl_{3}$ and $ROR$ are Lewis bases. $HCl$ is acid according to the concept of Arrhenius and Bronsted-Lowry.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.