Among the halides 1. BCl_3, 2. AlCl_3, 3. GaCl_3, 4. InCl_3, the order of decreasing Lewis acid character is:

JEE Main Chemistry question

Among the halides 1. , 2. , 3. , 4. , the order of decreasing Lewis acid character is:

(A)1, 2, 3, 4Correct
(B)4, 3, 2, 1
(C)3, 4, 2, 1
(D)2, 3, 4, 1

Answer: (A)

Solution

For a given halogen, the Lewis acidity of Group 13 trichlorides decreases on descending the group, as the central atom becomes larger and its orbitals overlap less

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Question ID VK-138513