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CBSE Class 12 Chemistry 2019 Outside Delhi Set 2 Solved Paper

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Question : 10 of 27
Marks: +1, -0
Define the following terms with a suitable example of each:
(a) Chelate complex
(b) Ambidentate ligand
OR
Using IUPAC norms, write the formula for the following complexes:
(a) Tetraamminediaquacobalt(III) chloride
(b) Dibromidobis(ethane-1,2-diamine) platinum(IV) nitrate
Solution:  
(a) A complex formed by bi or polydentate ligands with metal Example - [Co(en)3]3+[\mathrm{Co}(\mathrm{en})_3]^{3+}
(b) A ligand which can ligate through two different donor atoms. Example: SCN−\mathrm{SCN}^{-}
OR
(i) [Co(NH3)4(H2O)2]Cl3[\mathrm{Co}(\mathrm{NH}_3)_4(\mathrm{H}_2\mathrm{O})_2]\mathrm{Cl}_3
(ii) [PtBr2(en)2](NO3)2[\mathrm{Pt}\mathrm{Br}_2(\mathrm{en})_2](\mathrm{NO}_3)_2
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