1) What defines a ligand in coordination chemistry? a) A molecule that donates a pair of electrons to a metal ion b) A metal atom that accepts electrons from a non-metal c) A non-metal atom that accepts electrons from a metal d) A molecule that reacts with a base to form a complex 2) Which of the following is an example of a bidentate ligand? a) Ammonia (NH₃) b) Water (H₂O) c) Ethylenediamine (en) d) Chloride ion (Cl⁻) 3) Which of the following is TRUE about a chelating ligand? a) It binds to a metal center with only one bond b) It forms a single bond with a metal center c) It forms multiple bonds to a metal center, creating a ring structure d) It can only form bonds with anions, not with metal ions 4) Which of the following is NOT a common property of a ligand? a) It donates a pair of electrons to a metal ion b) It can be neutral or charged c) It can only form complexes with transition metals d) It can affect the geometry and reactivity of a metal complex 5) Which of the following is a characteristic of a monodentate ligand? a) It can form multiple bonds with a metal ion b) It donates two pairs of electrons to the metal center c) It binds to a metal ion using only one donor atom d) It forms a chelate ring with the metal ion

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