Q. Which of the following is a Lewis acid ?

4053 241 JEE MainJEE Main 2018Equilibrium Report Error

A

$P H_{3}$

21%

B

$B (C H_{3})_{3}$

49%

C

$N a H$

9%

D

$N F_{3}$

20%

Solution:

$B (C H_{3})_{3}$ acts as a Lewis acid due to incomplete octet of boron atom.