MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

An ambidentate ligand is a ligand that has more than one type of donor atom and can bind to the central metal ion through any of these different donor atoms. Examples of ambidentate ligands include NO _2^- (which can bind through N or O) and NCS ^- (which can bind through N or S). Checking the given options: Option 1 contains NO _2^- and NCS ^-, both of which are ambidentate ligands. Option 2 contains C _2 O _4^ 2- (binds only through O), ethylene diamine (binds only through N), and H _2 O (binds only through O). None of these are ambidentate ligands. Option 3 contains NO _2^-, which is an ambidentate ligand. Option 4 contains NCS ^-, which is an ambidentate ligand. Therefore, the set containing C _2 O _4^ 2- , ethylene diamine, and H _2 O does not contain any ambidentate ligand.