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प्रश्न
The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species?
विकल्प
\[\ce{[Fe(CO)5]}\]
\[\ce{[Fe(CN)6]^{3-}}\]
\[\ce{[Fe(C2O4)3]^{3-}}\]
\[\ce{[Fe(H2O)6]^{3+}}\]
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उत्तर
\[\ce{[Fe(C2O4)3]^{3-}}\]
Explanation:
Chelation (formation of cycle by linkage between metal ion and ligand) stabilizes the coordination compound. The ligand which chelates the metal ion are known as chelating ligand.
Here, only \[\ce{[Fe(C2O4)3]^{3-}}\] is a coordination compound which contains oxalate ion as a chelating ligand.
Hence, it stabilizes coordination compound by chelating \[\ce{Fe^{3+}}\] ion.
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| Column I (Complex ion) | Column II (Colour) |
| A. \[\ce{[Co(NH3)6]^{3+}}\] | 1. Violet |
| B. \[\ce{[Ti(H2O)6]^{3+}}\] | 2. Green |
| C. \[\ce{[Ni(H2O)6]^{2+}}\] | 3. Pale blue |
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