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Chemistry · d and f Block Elements

JEE Main 2025 — 28 January, Morning Shift — Question 36

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

  1. Option A:

    Ti3+\mathrm{Ti}^{3+}

  2. Option B:

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

    Correct
  3. Option C:

    Mn2+\mathrm{Mn}^{2+}

  4. Option D:

    Cr3+\mathrm{Cr}^{3+}

Answer: B

Step-by-step solution

Ni+2\mathrm{Ni}^{+2} gives violet colured bead in non-luminous flame under hot conditions. Ni+2\mathrm{Ni}^{+2} has d8\mathrm{d}^{8}

configuration which does not depend on nature of ligand present in octahedral complex.

Ni+2:t2 g6eg2\mathrm{Ni}^{+2}: \mathrm{t}_{2 \mathrm{~g}}{ }^{6} \mathrm{e}_{\mathrm{g}}{ }^{2}

Answer key and solution verified before publishing.

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Exam
JEE Main 2025
Paper
28 January, Morning Shift
Subject
Chemistry
Chapter
d and f Block Elements
Topic
Compounds of Chromium

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