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MCQMediumJEE Main 2026 · 21 January, Shift 1Crystal Field Theory

Chemistry Question from JEE Main 2026 · 21 January, Shift 1

Given below are two statements:

Statement I: Among [Cu(NH3)4]2+[Cu(NH_3)_4]^{2+}, [Ni(en)3]2+[Ni(en)_3]^{2+}, [Ni(NH3)6]2+[Ni(NH_3)_6]^{2+} and [Mn(H2O)6]2+[Mn(H_2O)_6]^{2+}, [Mn(H2O)6]2+[Mn(H_2O)_6]^{2+} has the maximum number of unpaired electrons.

Statement II: The number of pairs among {[NiCl4]2−,[Ni(CO)4]}\{[NiCl_4]^{2-}, [Ni(CO)_4]\}, {[NiCl4]2−,[Ni(CN)4]2−}\{[NiCl_4]^{2-}, [Ni(CN)_4]^{2-}\} and {[Ni(CO)4],[Ni(CN)4]2−}\{[Ni(CO)_4], [Ni(CN)_4]^{2-}\} that contain only diamagnetic species is two.

In the light of the above statements, choose the correct answer from the options given below:

  • A

    Statement I is false but Statement II is true

  • B

    Statement I is true but Statement II is false

  • C

    Both Statement I and Statement II are true

  • D

    Both Statement I and Statement II are false

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