78. Which of the following complexes can exhibit optical isomerism? (A) cis-Co(NH3)4Cl2 (B) trans-Co(en)2Br2 (C) cis-Co(en)2Cl2 (D) Co(NH3)3Cl3 (E) None of the above.

78. Which of the following complexes can exhibit optical isomerism?
(A) cis-Co(NH₃)₄Cl₂
(B) trans-Co(en)₂Br₂
(C) cis-Co(en)₂Cl₂
(D) Co(NH₃)₃Cl₃
(E) None of the above.

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統計： A(0), B(3), C(39), D(4), E(0) #2974241

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B1 · 2023/12/28

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81. Two well-known complex ions containing Ni are , which is green, and , which is purple. Which one of the following statements is true? (A) The crystal field splitting energy (△) is greater for than for . (B) absorbs energy in the red region of the spectrum. (C) Both complex ions are diamagnetic. (D) transmits light with wavelengths of approximately 650–700 nm. (E) The green complex absorbs green light.

78. Which of the following complexes can exhibit optical isomerism?
(A) cis-Co(NH₃)₄Cl₂
(B) trans-Co(en)₂Br₂
(C) cis-Co(en)₂Cl₂
(D) Co(NH₃)₃Cl₃
(E) None of the above.

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