Two Complex Ions Containing Ni Are [Ni(NH₃)₆]²⁺, Which Is Blue

Multiple Choice

Two complex ions containing Ni are [Ni(NH₃) ₆]²⁺, which is blue, and [Ni(en) ₃]²⁺, which is purple. Which one of these statements is true

A) The crystal field splitting energy (D) is greater for [Ni(NH₃) ₆]²⁺ than for [Ni(en) ₃]²⁺.
B) [Ni(en) ₃]²⁺ absorbs light in the violet region of the spectrum.
C) Both complex ions are diamagnetic.
D) The energy of the photon absorbed by [Ni(en) ₃]²⁺ is greater than that absorbed by [Ni(NH₃) ₆]²⁺.
E) The wavelength of the light absorbed by [Ni(en) ₃]²⁺ is greater than the wavelength absorbed by [Ni(NH₃) ₆]²⁺.