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Choose the correct statements from the following : (A) Ethane-1, 2-diamine is a chelating ligand. (B) Metallic aluminium is produced by electrolysis of aluminium oxide in presence of cryolite. (C) Cyanide ion is used as ligand for leaching of silver. (D) Phosphine act as a ligand in Wilkinson catalyst. (E) The stability constants of Ca2+ and Mg2+ are similar with EDTA complexes. Choose the correct answer from the options given below :

1. (C), (D), (E) only
2. (A), (B), (C) only
3. (A), (D), (E) only
4. (B), (C), (E) only

Correct answer: (A), (B), (C) only

Solution

Ethane-1,2-diamine is indeed a chelating ligand due to its ability to form multiple bonds with a metal ion, metallic aluminium is produced through the electrolysis of aluminium oxide with cryolite to lower the melting point, and cyanide ions effectively act as ligands in the leaching process for silver extraction.

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