Chemistry - Complete P-block Question with Solution | TestHub

Statement A: This is correct. Most Group 15 trihalides are covalent, but BiF₃ is predominantly ionic due to the high electronegativity difference between Bismuth and Fluorine.

Statement B: While the stability of the -3 oxidation state decreases down the group and Bi rarely shows it, this is often considered a borderline statement; however, the provided answer excludes it.

Statement C: This is incorrect. Nitrogen does show a +5 oxidation state (e.g., in N₂O₅ and HNO₃); it simply cannot have a covalency of 5 because it lacks d-orbitals.

Statement D: This is correct. For Group 15 hydrides (except NH₃), the boiling point increases down the group ($P{H}_3<As{H}_3<Sb{H}_3$) as van der Waals forces increase with molecular size.