Given below are four statements regarding the properties of p-block elements and their hydrides: A. The boiling point order of group 17 hydrides is HCl B. The halogen forming the most thermally stable hydride has the most negative electron gain enthalpy. C. The group 15 element forming a hydride with the lowest boiling point can show a maximum covalency of 6. D. The bond angle in group 15 hydrides ( EH₃ ) decreases d

Step-by-step solution

Statement A is correct: Due to strong intermolecular hydrogen bonding, HF has the highest boiling point among hydrogen halides. The correct order is HCl Statement B is incorrect: The most thermally stable hydride is HF because the H-F bond length is the shortest and its bond dissociation enthalpy is the highest. However, fluorine has a less negative electron gain enthalpy than chlorine due to its small size and strong interelectronic repulsions. Statement C is correct: Among group 15 hydrides, PH₃ has the lowest bo