CBSE Class 12 Chemistry 2014 Delhi Set 1 Solved Paper

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Question : 3
Total: 30
Which of the following is more stable complex and why? [Co(NH3)6]3+ and [Co(en)3]3+
Solution:  
[Co(en)3]3+ is more stable than that of the [Co(NH3)6]3+.
This is because the chelating ligands form a more stable complex than the non-chelating ligands.
Since, ethylenediamine is a bidentate ligand and forms a stable chelate than that of the ammonia ligand.
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