A) \[BC{{l}_{3}}\] and \[AlC{{I}_{3}}\]are both Lewis acids and \[BC{{l}_{3}}\]is stronger than \[AlC{{l}_{3}}\]
B) \[BC{{l}_{3}}\]and \[AlC{{l}_{3}}\]both Lew is acids and \[AlC{{l}_{3}}\]is stronger that \[BC{{l}_{3}}\]
C) \[BC{{l}_{3}}\] and \[AlC{{I}_{3}}\]are both equally strong Lewis acids
D) Both \[BC{{l}_{3}}\]and \[AlC{{l}_{3}}\] are not Lewis acids.
Correct Answer: A
Solution :
[a] Due to higher EN of B it attracts lone pair of electron with faster rate.
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