First slide

13th group or boron group

Question

Among the halides
1. BCl₃ 2. AlCl₃ 3. GaCl₃ 4. InCl₃
The order of decreasing Lewis acid character is:

Moderate

A

1,2,3,4
B

4,3,2,1
C

3,4,2,1
D

2,3,4,1

Solution

Among the halides.
1. BCl₃, 2. AlCl₃, 3. GaCl₃, 4. InCl₃
The order of decreasing Lewis acid character is 1. BCl₃, 2. AlCl₃, 3. GaCl₃, 4. InCl₃.
On moving down the boron family, the Lewis acid character decreases.

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