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QAIPM-2012-Ch-1702: NEET 2012 Chemistry - Class 12 AIPM-2012-Ch-1702 Solution: Which one of the following is an outer orbital complex and…

Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?

Multiple Choice Options

  • A [Ni(NH3)6]2+[Ni(NH_3)_6]^{2+}
  • B [Zn(NH3)6]2+[Zn(NH_3)_6]^{2+}
  • C [Cr(NH3)6]3+[Cr(NH_3)_6]^{3+}
  • D [Co(NH3)6]3+[Co(NH_3)_6]^{3+}

Step-by-Step Verified Solution

Those orbitals which utilizes 3d-orbitals for bonding and exhibit paramagnetic behaviour forms outer orbital complex. Ni +2 = [Ar] 3d 8 4s 0 _ It forms outer orbital complex. (b) [Zn(NH 3 ) 6 ] 2+ _ outer orbital complex but diamagnetic (c) [Cr(NH 3 ) 6 ] 3+ _ inner orbital complex but paramagnetic (d) [Co(NH 3 ) 6 ] 3+ _ inner orbital complex but diamagnetic

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