Oxidation States and Trends in Physical and Chemical Properties — Prelims Questions

Which of the following statements regarding the properties of Group 15 elements is INCORRECT?

Which of the following elements of Group 15 shows the most pronounced inert pair effect?

Which of the following hydrides of Group 15 elements is the strongest reducing agent?

Which of the following oxides of Group 15 elements is amphoteric?

Which of the following statements correctly describes the trend in bond angle of Group 15 hydrides ($EH_3$)?

Which of the following statements is true regarding the allotropy of Group 15 elements?