Properties and trends of p-block elements group 13 to 18 - Question Bank

1. The ionization enthalpy of Group 16 elements generally:
A) Increases down the group
B) Decreases down the group
C) Remains the same
D) First decreases then increases
2. Which compound of Aluminum is used in antiperspirants?
A) AlCl₃
B) Al₂(SO₄)₃
C) Al(OH)₃
D) Potash alum
3. The reason for the diagonal relationship between Boron and Silicon is:
A) Similar atomic size and charge density
B) Similar electronegativity
C) Similar ionization enthalpy
D) Similar number of valence electrons
4. Which halogen has the lowest electronegativity?
A) Fluorine
B) Chlorine
C) Bromine
D) Iodine
5. Ozone (O₃) is an allotrope of oxygen and acts as a:
A) Reducing agent
B) Oxidizing agent
C) Both oxidizing and reducing agent
D) Neither oxidizing nor reducing agent
6. The highest oxidation state of nitrogen is:
A) +3
B) +4
C) +5
D) +2
7. Which allotrope of carbon is used as a lubricant?
A) Diamond
B) Graphite
C) Fullerene
D) Graphene
8. The atomic radii of Group 13 elements generally:
A) Increases down the group
B) Decreases down the group
C) Remains the same
D) First decreases then increases
9. Which of the following is the most stable interhalogen compound?
A) ClF₃
B) BrF₃
C) IF₅
D) ICl
10. Which element in Group 16 is a metalloid?
A) Oxygen
B) Sulfur
C) Selenium
D) Tellurium
11. Ammonia (NH₃) is a:
A) Lewis acid
B) Brønsted-Lowry acid
C) Lewis base
D) Brønsted-Lowry base
12. The stability of +1 oxidation state in Group 14 increases in the order:
A) C < Si < Ge < Sn < Pb
B) Pb < Sn < Ge < Si < C
C) C < Ge < Si < Sn < Pb
D) C < Si < Sn < Ge < Pb
13. Which of the following is a strong reducing agent?
A) H₂O
B) H₂S
C) H₂Se
D) H₂Te
14. Boron forms covalent compounds due to its:
A) Low ionization enthalpy
B) High electronegativity
C) Small atomic size and high ionization enthalpy
D) Large atomic size
15. The reactivity of halogens decreases in the order:
A) F₂ > Cl₂ > Br₂ > I₂
B) I₂ > Br₂ > Cl₂ > F₂
C) Cl₂ > F₂ > Br₂ > I₂
D) Br₂ > Cl₂ > I₂ > F₂
16. Which allotrope of oxygen is essential for respiration?
A) O₂
B) O₃
C) O₄
D) O₅
17. The common oxidation state of phosphorus is:
A) -3, +3, +5
B) -2, +2, +4
C) -1, +1, +3
D) 0, +1, +2
18. Which element in Group 14 is a semiconductor?
A) Carbon
B) Silicon
C) Tin
D) Lead
19. The acidic nature of hydrides of Group 13 elements (EH₃) generally:
A) Increases down the group
B) Decreases down the group
C) Remains constant
D) First increases then decreases
20. Which element in Group 17 is a solid at room temperature?
A) Chlorine
B) Bromine
C) Iodine
D) Astatine
21. Which of the following is a non-metal that can form a strong acid?
A) Sulfur
B) Selenium
C) Tellurium
D) Oxygen
22. Which allotrope of phosphorus is the least stable and highly reactive?
A) White phosphorus
B) Red phosphorus
C) Black phosphorus
D) Violet phosphorus
23. The bond length of N-N triple bond in N₂ is approximately:
A) 110 pm
B) 120 pm
C) 130 pm
D) 140 pm
24. Which element in Group 14 exhibits the highest ionization energy?
A) Carbon
B) Silicon
C) Germanium
D) Tin
25. The tendency to form pπ-pπ multiple bonds is highest in which element of Group 13?
A) Boron
B) Aluminum
C) Gallium
D) Indium
26. Which halogen is used as a disinfectant?
A) Fluorine
B) Chlorine
C) Bromine
D) Iodine
27. Which element in Group 16 has the lowest ionization enthalpy?
A) Oxygen
B) Sulfur
C) Selenium
D) Tellurium
28. The anomalous behavior of which element is responsible for the unique properties of Group 15?
A) Nitrogen
B) Phosphorus
C) Arsenic
D) Antimony
29. Which element in Group 14 forms a very stable oxide, SiO₂?
A) Carbon
B) Silicon
C) Germanium
D) Tin
30. The most common oxidation state of Aluminum is:
A) +1
B) +2
C) +3
D) 0
31. The bond angle in water (H₂O) is approximately:
A) 104.5°
B) 109.5°
C) 120°
D) 90°
32. Which of the following is a strong oxidizing agent?
A) Fluorine
B) Chlorine
C) Bromine
D) Iodine
33. Which is the most stable allotrope of phosphorus?
A) White phosphorus
B) Red phosphorus
C) Black phosphorus
D) Violet phosphorus
34. Nitrogen molecule (N₂) is:
A) Paramagnetic
B) Diamagnetic
C) Ferromagnetic
D) Antiferromagnetic
35. Which element in Group 14 exhibits allotropy?
A) Carbon
B) Silicon
C) Germanium
D) Tin
36. The tendency to exhibit +3 oxidation state in Group 13 increases in the order:
A) B < Al < Ga < In < Tl
B) Tl < In < Ga < Al < B
C) B < Ga < Al < In < Tl
D) B < Al < In < Ga < Tl
37. Which halogen exhibits the highest melting and boiling point?
A) Fluorine
B) Chlorine
C) Bromine
D) Iodine
38. The allotrope of sulfur that is stable at room temperature is:
A) Rhombic sulfur
B) Monoclinic sulfur
C) Plastic sulfur
D) Milk of sulfur
39. Which of the following is a characteristic property of Boron?
A) Forms acidic oxides
B) Forms basic oxides
C) Forms amphoteric oxides
D) Forms neutral oxides
40. What is the electronic configuration of Boron?
A) 1s²2s²2p¹
B) 1s²2s¹2p²
C) 1s²2s²2p²
D) 1s²2s²2p³
41. Which element in Group 16 is a liquid at room temperature?
A) Sulfur
B) Selenium
C) Tellurium
D) Bromine
42. The maximum number of covalent bonds formed by nitrogen is:
A) 3
B) 4
C) 5
D) 2
43. Which element in Group 14 commonly exhibits an oxidation state of +2 due to the inert pair effect?
A) Carbon
B) Silicon
C) Lead
D) Tin
44. The acidic character of oxides of Group 13 elements generally increases or decreases down the group?
A) Increases
B) Decreases
C) Remains the same
D) First increases then decreases
45. Which is the most electronegative element in Group 16?
A) Sulfur
B) Selenium
C) Tellurium
D) Oxygen
46. Which allotrope of carbon is the hardest natural substance?
A) Graphite
B) Diamond
C) Fullerene
D) Graphene
47. The inert pair effect is most pronounced in which group?
A) Group 13
B) Group 14
C) Group 15
D) Group 16
48. Which element in Group 14 has the strongest tendency to form covalent compounds?
A) Carbon
B) Silicon
C) Germanium
D) Tin
49. What is the common oxidation state of Group 13 elements?
A) +1 and +3
B) +2 and +4
C) +3
D) +1
50. Which of the following elements is a metalloid and belongs to Group 13?
A) Aluminum
B) Gallium
C) Boron
D) Indium
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