JEE Main - Properties and trends of p-block elements group 13 to 18 One Line Questions & Answers

1. The common oxidation state of phosphorus is: — -3, +3, +5

2. The most common oxidation state of Aluminum is: — +3

3. What is the common oxidation state of Group 13 elements? — +3

4. The highest oxidation state of nitrogen is: — +5

5. The bond angle in water (H₂O) is approximately: — 104.5°

6. The bond length of N-N triple bond in N₂ is approximately: — 130 pm

7. What is the electronic configuration of Boron? — 1s²2s²2p¹

8. The maximum number of covalent bonds formed by nitrogen is: — 4

9. Which compound of Aluminum is used in antiperspirants? — AlCl₃

10. Which of the following elements is a metalloid and belongs to Group 13? — Boron

11. The tendency to exhibit +3 oxidation state in Group 13 increases in the order: — B < Al < Ga < In < Tl

12. The tendency to form pπ-pπ multiple bonds is highest in which element of Group 13? — Boron

13. The stability of +1 oxidation state in Group 14 increases in the order: — C < Si < Ge < Sn < Pb

14. Which element in Group 14 has the strongest tendency to form covalent compounds? — Carbon

15. Which element in Group 14 commonly exhibits an oxidation state of +2 due to the inert pair effect? — Lead

16. Which element in Group 14 exhibits allotropy? — Carbon

17. Which element in Group 14 forms a very stable oxide, SiO₂? — Silicon

18. Which element in Group 14 exhibits the highest ionization energy? — Carbon

19. Which element in Group 14 is a semiconductor? — Silicon

20. Which element in Group 17 is a solid at room temperature? — Iodine

21. Which of the following is the most stable interhalogen compound? — ICl

22. Which allotrope of carbon is used as a lubricant? — Graphite

23. The reactivity of halogens decreases in the order: — F₂ > Cl₂ > Br₂ > I₂

24. Which halogen exhibits the highest melting and boiling point? — Iodine

25. Which of the following is a strong oxidizing agent? — Fluorine

26. Which halogen is used as a disinfectant? — Chlorine

27. Which halogen has the lowest electronegativity? — Iodine

28. Which of the following is a characteristic property of Boron? — Forms acidic oxides

29. Which allotrope of carbon is the hardest natural substance? — Diamond

30. The inert pair effect is most pronounced in which group? — Group 15

31. Which of the following is a strong reducing agent? — H₂Te

32. The acidic character of oxides of Group 13 elements generally increases or decreases down the group? — Decreases

33. The acidic nature of hydrides of Group 13 elements (EH₃) generally: — Decreases down the group

34. The atomic radii of Group 13 elements generally: — Increases down the group

35. The ionization enthalpy of Group 16 elements generally: — Decreases down the group

36. Ammonia (NH₃) is a: — Lewis base

37. Boron forms covalent compounds due to its: — Small atomic size and high ionization enthalpy

38. The anomalous behavior of which element is responsible for the unique properties of Group 15? — Nitrogen

39. Which allotrope of oxygen is essential for respiration? — O₂

40. Which element in Group 16 has the lowest ionization enthalpy? — Tellurium

41. Which element in Group 16 is a metalloid? — Tellurium

42. Nitrogen molecule (N₂) is: — Diamagnetic

43. Ozone (O₃) is an allotrope of oxygen and acts as a: — Oxidizing agent

44. The allotrope of sulfur that is stable at room temperature is: — Rhombic sulfur

45. The reason for the diagonal relationship between Boron and Silicon is: — Similar atomic size and charge density

46. Which is the most electronegative element in Group 16? — Oxygen

47. Which element in Group 16 is a liquid at room temperature? — Bromine

48. Which of the following is a non-metal that can form a strong acid? — Sulfur

49. Which is the most stable allotrope of phosphorus? — Black phosphorus

50. Which allotrope of phosphorus is the least stable and highly reactive? — White phosphorus

Properties and trends of p-block elements group 13 to 18 - One Line Questions