In complexes off wea field ligands, `Delta_(o) lt P` (pairing energy), the energy difference between `t_(2g) and e_(g)` sets is relatively less. Under the unfluence of strong field ligands, `Delta_(O) gt p` (Pairing energy), the energy difference between `t_(2g) and e_(g)` sets is relatively high.
Q. Select the correct increasing order of 10 Dq. value of chromium complexes:
(1) `[Cr(en)_(3)]^(3+)`
(2) `[Cr(o x)_(3)]^(3-)` ltBrgt (3) `[CrF_(6)]^(3-)`
(4) `[Cr(H_(2)O)_(6)]^(3+)`

Options

A. `4 lt 3 lt 1 lt 2`
B. `3 lt 4 lt 2 lt 1`
C. `4 lt 3 lt 2 lt 1`
D. `3 lt 4 lt 1 lt 2`

Answer

B