Number of unpaired electrons or magnetic nature of a given complex

1. A.
   Four
2. B.
   Two
3. C.
   Zero
4. D.
   Six

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1. A.
   Prior to hybridization Co³⁺ possesses four unpaired electrons.
2. B.
   This complex has all electrons paired.
3. C.
   It is a high spin complex.
4. D.
   It is a diamagnetic complex.

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1. A.
   4
2. B.
   3
3. C.
   2
4. D.
   1

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1. A.
   4
2. B.
   3
3. C.
   2
4. D.
   Zero

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1. A.
   $[\mathrm{Co(NH_3)_6}]^{3+}$
2. B.
   $[\mathrm{CoF_6}]^{3-}$
3. C.
   $[\mathrm{NiCl_4}]^{2-}$
4. D.
   $[\mathrm{Ni(CN)_4}]^{2-}$

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1. A.
   0, square planar
2. B.
   2, square planar
3. C.
   4, octahedral
4. D.
   0, octahedral

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1. A.
   $\mathrm{[CoF_6]^{3-}}$
2. B.
   $\mathrm{[Co(NH_3)_6]^{3+}}$
3. C.
   $\mathrm{[NiCl_4]^{2-}}$
4. D.
   $\mathrm{[Ni(CN)_4]^{2-}}$

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