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21. Which of the following complexes shows geometric isomerism?
(A) [Co(H2O)5Cl]SO4
(B) [Co(H2O)6]Cl3
(C) [Co(H2O)5Cl]Cl2
(D) K[Co(H2O)2Cl4]
(E) Na3 [CoCl6]


21. Which of the following complexes sho..-阿摩線上測驗