Identify the correct trend given below:
(Atomic No = `Ti : 22 , Cr : 24` and Mo : 42)

Options

A. `Delta_@` of `[Cr(H_2 O)_6]^(2+) gt [Mo(H_2 O)_6]^(2+)` and `Delta_@` of `[Ti(H_2 O)_6]^(3+) gt [Ti(H_2 O)_6]^(2+)`
B. ` Delta_@ ` of `[Cr(H_2 O)_6]^(2+) gt [Mo(H_2 O)_6]^(2+) and Delta_@` of `[Ti(H_2 O)_6]^(3+) lt [Ti(H_2 O)_6 ]^(2+)`
C. `Delta_@` of `[Cr(H_2O)_6]^(2+) lt [Mo(H_2 O)_6]^(2+) and Delta_@ ` of `[Ti(H_2 O)_6]^(3+) gt [Ti(H_2 O)_6]^(2+)`
D. `Delta_@` of `[Cr(H_2O)_6]^(2+) lt [Mo(H_2 O)_6]^(2+) and Delta_@ ` of `[Ti(H_2 O)_6]^(3+) lt [Ti(H_2 O)_6]^(2+)`

Answer

C

Explanation

The Spitting is affected by the oxidation state of the central metal ion. A higher oxidation state leads to larger splitting hence
`Delta_0 ` of `[Ti(H_2 O)_6 ]^(3+) gt Delta_0` of `[Ti(H_2 O)_6]^(2+)`
Further `Delta_0` also depends of `Z_("eff")` nad `Z_("eff")` of 4 d series is more than 3 d series.
`Delta_0 ` of `[Cr(H_2 O)_6]^(2+) lt Delta_0 ` of `[Mo(H_2 O)_6 ]^(2+)`