Which of the following facts about the complex $\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_6\right]{\mathrm{Cl}}_3$ is wrong?

detailed solution

Correct option is C

ln [Cr(NH3)6]3+, Cr exists as Cr3+ ion. The outer orbital electronic configuration of Cr is 3d3 4s0. The orbital diagram is represented byHere, X indicates lone pair of NH3 donated to Cr. Hence,(a) d2sp3-hybridization, octahedral. Thus, correct.(b) There are three unpaired electrons, hence paramagnetic. Thus, correct.(c) d2sp3-inner orbital complex, thus incorrect.(d) Due to ionizable Cl- ions, white precipitate with AgNO3, thus correct.Therefore, (3) is wrong.