JEE Main 2026 Chemistry question
Consider the metal complexes [Ni(en)₃]²⁺ (A), [NiCl₄]²⁻ (B) and [Ni(NH₃)₆]²⁺ (C). Choose the CORRECT option by considering the number of unpaired electrons present in (A), (B) and (C) respectively and the order of frequency of absorption.
Answer: (A)
Solution
Ni²⁺ is d⁸; both octahedral (A, C) and tetrahedral (B) d⁸ complexes always have 2 unpaired electrons. Crystal field splitting (and hence absorption
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