The pair in which both species have same magnetic moment (spin only value) is .

Options

A. `[Cr(H_(2)O)_(6)]^(2+), [CoCl_(4)]^(2-)`
B. `[Cr(H_(2)O)_(6)]^(2+), [Fe(H_(2)O)_(6)]^(2+)`
C. `[Mn(H_(2)O)_(6)]^(2+), [Cr(H_(2)O)_(6)]^(2+)`
D. `[CoCl_(4)]^(2-),[Fe(H_(2)O)_(6)]^(2+)`

Answer

B

Explanation

`(b) [Cr(H_(2)O)_(6)]^(2+) implies d^(4),[FeH_(2)O)_(6)]^(2+) implies d^(6).` Both have 4 unpaired electrons.