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JEE Main 2026 Chemistry question

ChemistryThe d and f-Block ElementsJEE Main 2026

Number of paramagnetic ions among the following d- and f-block metal ions is . Mn²⁺, Cu²⁺, Zn²⁺, Yb²⁺, Sc³⁺, La³⁺, Gd³⁺, Lu³⁺, Ti⁴⁺, Ce⁴⁺ (Atomic number of Mn = 25, Cu = 29, Zn = 30, Yb = 70, Sc = 21, La = 57, Gd = 64, Lu = 71, Ti = 22, Ce = 58)

Answer: 3

Solution

Mn²⁺ (3d⁵, 5 unpaired), Cu²⁺ (3d⁹, 1 unpaired) and Gd³⁺ ([Xe]4f⁷, 7 unpaired) are paramagnetic. Zn²⁺(d¹⁰),

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Question ID VK-015183