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BITSAT2012ChemistryCoordination CompoundsActual

Among the following the lowest degree of paramagnetism per mole of the compound at 298 K will be shown by

Options

  1. AMnSO ₄ 4 H ₂ O
  2. BCuSO ₄ .5 H ₂ O
  3. CFeSO ₄ 6 H ₂ O
  4. DNiSO ₄ 6 H ₂ O

Correct answer

B. CuSO ₄ .5 H ₂ O

Step-by-step solution

array lllll Ion & Mn ²⁺ & Cu ²⁺ & Fe ²⁺ & Ni ²⁺ EC & 3 d⁵ & 3 d⁹ & 3 d⁶ & 3 d⁸ Number of & 5 & 1 & 4 & 2 array unpaired electron Hence lowest paramagnetism is shown by CuSO ₄ 5 H ₂ O

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