The metal ion whose electronic configuration is not affected by the nature of the ligand and which gives a violet colour in non-luminous flame under hot condition in borax bead test is

Step-by-step solution

Ni ²⁺ gives violet colour with borax bead test in nonluminous flame under hot conditions. Ni ²⁺ has d ^8 configuration which does not depend on nature of ligand present in octahedral field. Ni ²⁺ t _ 2 g ^6 eg ^2