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JEE Main 202528 JanuaryMorning Shift
Exam
JEE Main
Year
2025
Date
28 January
Shift
Morning Shift
Subject
Chemistry
Chapter
Coordination Compounds

JEE Main 2025 · 28 January · Morning Shift · Chemistry · Coordination Compounds

The metal ion whose electronic configuration is not affected by the...

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

Options

  1. AMn2+\mathrm{Mn}^{2+}
  2. BCr3+\mathrm{Cr}^{3+}
  3. CNi2+\mathrm{Ni}^{2+}
  4. DTi3+\mathrm{Ti}^{3+}

Correct answer

C. Ni2+\mathrm{Ni}^{2+}

Step-by-step solution

Ni2+\mathrm{Ni}^{2+} gives violet colour with borax bead test in nonluminous flame under hot conditions. Ni2+\mathrm{Ni}^{2+} has d8\mathrm{d}^8 configuration which does not depend on nature of ligand present in octahedral field. Ni2+⇒t2g6eg2\mathrm{Ni}^{2+} \Rightarrow \mathrm{t}_{2 g}^6 \mathrm{eg}^2
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