JEE Chemistry 2024 Question with Solution

Given: Five statements about coordination chemistry and metallurgy are to be checked individually.

Find: The option containing all correct statements.

Statement (A): Ethane-1,2-diamine (ethylenediamine, en) has two donor nitrogen atoms and acts as a bidentate ligand. Hence it is a chelating ligand. So (A) is correct.

Statement (B): Aluminium is produced industrially by electrolysis of aluminium oxide dissolved in cryolite in the Hall-H\u00e9roult process. So (B) is correct.

Statement (C): In the cyanide process, silver forms the soluble complex $[Ag(CN)_2]^-$, so cyanide ion acts as a ligand during leaching. So (C) is correct.

Statement (D): Wilkinson catalyst contains triphenylphosphine ligand $P(C_6H_5)_3$, not phosphine $PH_3$. So (D) is incorrect.

Statement (E): The EDTA complexes of $Ca^{2+}$ and $Mg^{2+}$ do not have similar stability constants; they differ significantly. So (E) is incorrect.

Therefore, the correct statements are (A), (B), and (C).

Among the given options, this corresponds to option B.

Note: The solution's header says "The Correct Option is C", but the detailed working and final result on the same the solution clearly conclude (3) (A), (B), (C) only, which maps to option B in the provided options list.