Strongest or weakest field ligand, or order of field strength, from the spectrochemical series

1. A.
   S²⁻
2. B.
   OH⁻
3. C.
   EDTA
4. D.
   en

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1. A.
   ${CN}^{-}$
2. B.
   ${SCN}^{-}$
3. C.
   $I^{-}$
4. D.
   $C_{2}O_{4}\ ^{2 -}$

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1. A.
   $H_{2}O$
2. B.
   ${OH}^{-}$
3. C.
   $C_{2}O_{4}^{2 -}$
4. D.
   CO

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1. A.
   ${Cl}^{-} < I^{-} < S^{2 -} < {OH}^{-}$
2. B.
   $I^{-} < {Cl}^{-} < S^{2 -} < {OH}^{-}$
3. C.
   ${OH}^{-} < {Cl}^{-} < I^{-} < S^{2 -}$
4. D.
   $\ S^{2 -} < {OH}^{-} < I^{-} < {Cl}^{-}$

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1. A.
   EDTA
2. B.
   CO
3. C.
   $F^{-}$
4. D.
   ${NH}_{3}$

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1. A.
   ${NH}_{3}$
2. B.
   ${NC}^{-}$
3. C.
   ${Br}^{-}$
4. D.
   CO

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1. A.
   $\mathrm{CN^-}$
2. B.
   $\mathrm{H_2O}$
3. C.
   $\mathrm{Cl^-}$
4. D.
   $\mathrm{NH_3}$

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1. A.
   $\mathrm{Br^-}$
2. B.
   $\mathrm{OH^-}$
3. C.
   en
4. D.
   $\mathrm{H_2O}$

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1. A.
   $\mathrm{H_2O}$
2. B.
   $\mathrm{NH_3}$
3. C.
   $\mathrm{S^{2-}}$
4. D.
   $\mathrm{NCS^-}$

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1. A.
   $\mathrm{EDTA < C_2O_4^{2-} < H_2O < en}$
2. B.
   $\mathrm{en < H_2O < EDTA < C_2O_4^{2-}}$
3. C.
   $\mathrm{C_2O_4^{2-} < H_2O < EDTA < en}$
4. D.
   $\mathrm{H_2O < en < C_2O_4^{2-} < EDTA}$

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