Question

Which of the following facts about the complex `[Cr(NH_(3))_(6)]Cl_(3)` is wrong ?
A. The complex involves `d^(2)sp^(3)` hybridization and is octahedral in shape
B. The complex is paramagnetic
C. The complex is an outer orbital complex
D. The complex gives white precipitate with silver nitrate solution

Answer 1

Correct Answer - C
In case of `d^(3)` configuration, the number of unpaired electrons remains 3 whether the ligand is strong field or weak field. The hybridisation scheme can be shown as follow.

Hence the complex is inner orbital complex as it involves `(n-1) d` orbitals for hybridisation , `3.93 = sqrt(n(n+2))` , so `n=3` ( here n is numbr of unpaired electron (s)).