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 $$\mathrm{Ca}^{2+}$$ and $$\mathrm{Mg}^{2+}$$ are similar with EDTA complexes.

Choose the correct answer from the options given below :

A reagent which gives brilliant red precipitate with Nickel ions in basic medium is

Match List I with List II

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In which one of the following metal carbonyls, $$\mathrm{CO}$$ forms a bridge between metal atoms?