MCQ
Which of the following complex ion shows optical isomers?
- A$\left[ ZnCl _4\right]^{2-}$
- B$\left[ Co ( CN )_6\right]^{3-}$
- C$\left[ Cu \left( NH _3\right)_4\right]^{2+}$
- ✓$\left[ Cr \left( C _2 O _4\right)_3\right]^{3-}$
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