Which one of the following statement is correct for `d^4` ions [P = pairing energy]

Options

A. when `Delta _0 gt P`, low - spin complex form
B. when `Delta _0 lt P` low ,spin complex form
C. when `Delta _0 gt P` high - spin complex form
D. when `Delta _0 lt P` , both high - spin and low -spin complexes form

Answer

A

Explanation

When value of ` Delta _0` is greater than pairing energy , pairing of electron takes place hence low - spin complexes are formed .