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ChemistryJEE Main 2 Apr 2026, Shift 2·Q20·MCQ·Easy–moderate

Practical / Qualitative Analysis · Borax bead test

Among FeX2+\ce{Fe^2+}, FeX3+\ce{Fe^3+}, CrX2+\ce{Cr^2+} and ZnX2+\ce{Zn^2+}, the ion that shows positive borax bead test and with highest ionisation enthalpy is:
  1. (1)FeX2+\ce{Fe^2+}
  2. (2)ZnX2+\ce{Zn^2+}
  3. (3)CrX2+\ce{Cr^2+}
  4. (4)FeX3+\ce{Fe^3+}

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See the full 2 Apr 2026, Shift 2 paper