TRB BT Assistant - s-Block and p-Block Elements Online Test (MCQ Quiz)

1. Which of the following is a characteristic property of alkali metals (Group 1 elements)?

A) High ionization energy B) Tendency to form +2 oxidation state C) Strong reducing agents D) Non-metallic character

2. What is the common oxidation state of alkaline earth metals (Group 2 elements)?

A) -1 B) 0 C) +1 D) +2

3. Which element is the most electronegative in the p-block?

A) Fluorine B) Chlorine C) Oxygen D) Bromine

4. The first ionization energy generally decreases down the group for both s-block and p-block elements. Which is an exception to this trend in Group 13?

A) Boron to Aluminum B) Aluminum to Gallium C) Gallium to Indium D) Indium to Thallium

5. Which of the following alkali metals is the most reactive?

A) Lithium B) Sodium C) Potassium D) Cesium

6. Which alkaline earth metal imparts a brick-red color to a flame test?

A) Magnesium B) Calcium C) Strontium D) Barium

7. The inert pair effect is most pronounced in which group of the p-block elements?

A) Group 13 B) Group 14 C) Group 15 D) Group 16

8. Which element is known as the 'king of chemicals' and is a major component of sulfuric acid production?

A) Sulfur B) Oxygen C) Nitrogen D) Phosphorus

9. What is the most common allotrope of carbon in the p-block?

A) Diamond B) Graphite C) Fullerenes D) Amorphous Carbon

10. Which alkali metal forms a stable nitride (Li₃N)?

A) Sodium B) Potassium C) Lithium D) Rubidium

11. The anomalous behavior of Lithium compared to other alkali metals is due to:

A) Its larger atomic size B) Its low electronegativity C) Its high charge density D) Its inability to form hydrides

12. Which of the following is a strong oxidizing agent?

A) Sodium B) Magnesium C) Fluorine D) Potassium

13. The allotrope of phosphorus that is white and spontaneously ignites in air is:

A) Red phosphorus B) Black phosphorus C) Yellow phosphorus D) Violet phosphorus

14. Which element in Group 14 exhibits allotropy and forms compounds in +2 and +4 oxidation states?

A) Carbon B) Silicon C) Germanium D) Lead

15. Which of the following is NOT a property of Group 1 elements?

A) They are highly electropositive. B) They form ionic hydrides. C) They have high melting points. D) They readily lose one electron.

16. The diagonal relationship between Lithium and Magnesium is due to:

A) Similar atomic radii and charge density B) Similar ionization energies C) Similar electronegativity values D) Similar number of valence electrons

17. Which element in Group 16 is a metalloid and a semiconductor?

A) Oxygen B) Sulfur C) Selenium D) Tellurium

18. Which of the following is the most stable allotrope of sulfur?

A) Monoclinic sulfur B) Rhombic sulfur C) Plastic sulfur D) Milk of sulfur

19. The hydrides formed by alkali metals are:

A) Covalent and acidic B) Ionic and basic C) Covalent and neutral D) Ionic and acidic

20. Which element in Group 17 is a liquid at room temperature?

A) Fluorine B) Chlorine C) Bromine D) Iodine

21. The anomalous behavior of Boron compared to other Group 13 elements is due to:

A) Its metallic character B) Its small size and high electronegativity C) Its ability to form +3 oxidation state D) Its tendency to form ionic compounds

22. Which of the following is a strong base formed by an alkali metal?

A) LiOH B) NaOH C) KOH D) All of the above

23. Which allotrope of carbon is used as a lubricant?

A) Diamond B) Graphite C) Buckminsterfullerene D) Graphene

24. The most abundant element in the Earth's crust that belongs to the s-block is:

A) Sodium B) Potassium C) Magnesium D) Calcium

25. Which element in Group 15 has the highest melting and boiling points?

A) Nitrogen B) Phosphorus C) Arsenic D) Bismuth

26. The oxidizing power of halogens decreases in the order:

A) F₂ > Cl₂ > Br₂ > I₂ B) I₂ > Br₂ > Cl₂ > F₂ C) Cl₂ > Br₂ > F₂ > I₂ D) F₂ > I₂ > Cl₂ > Br₂

27. Which of the following is NOT a characteristic of p-block elements?

A) They exhibit variable oxidation states. B) They form acidic oxides. C) They are generally non-metals. D) They have a general electronic configuration of ns²np¹⁻⁶.

28. Which alkali metal has the lowest density?

A) Lithium B) Sodium C) Potassium D) Rubidium

29. The diagonal relationship between Beryllium and Aluminum is due to:

A) Similar atomic radii and charge density B) Similar number of valence electrons C) Similar ionization energies D) Similar electronegativity values

30. Which element in Group 14 forms stable peroxides and superoxides?

A) Carbon B) Silicon C) Germanium D) Tin

31. The reason for the higher melting point of Group 1 elements compared to Group 2 elements is:

A) Larger atomic size of Group 1 B) Stronger metallic bonding in Group 1 C) Weaker metallic bonding in Group 1 due to loss of one electron D) Higher ionization energy of Group 1

32. Which of the following is a noble gas used in lighting (e.g., neon signs)?

A) Helium B) Neon C) Argon D) Krypton

33. Which of the following forms a stable compound with hydrogen, like PH₃?

A) Oxygen B) Sulfur C) Nitrogen D) Selenium

34. The element that exhibits the most pronounced inert pair effect is:

A) Aluminum B) Gallium C) Indium D) Thallium

35. Which alkali metal is used in photoelectric cells?

A) Lithium B) Sodium C) Potassium D) Rubidium

36. The allotrope of carbon that is the hardest naturally occurring substance is:

A) Graphite B) Diamond C) Fullerene D) Graphene

37. The most electronegative element in the s-block is:

A) Lithium B) Sodium C) Potassium D) Cesium

38. Which element in Group 16 is essential for respiration?

A) Sulfur B) Selenium C) Tellurium D) Oxygen

39. The compound formed between an alkali metal and water is:

A) Metal hydroxide and hydrogen gas B) Metal oxide and water C) Metal carbonate and oxygen gas D) Metal peroxide and hydrogen gas

40. Which of the following is a characteristic property of halogens (Group 17 elements)?

A) Low electronegativity B) Tendency to gain one electron C) Formation of basic oxides D) Low reactivity

41. Which element in Group 14 is used in semiconductors?

A) Carbon B) Silicon C) Germanium D) Tin

42. The diagonal relationship between Sodium and Magnesium is NOT observed because:

A) They are in different periods B) Their charge densities are significantly different C) They have different numbers of valence electrons D) Their electronegativities are very different

43. Which noble gas is used in balloons for weather forecasting due to its low density and non-flammability?

A) Neon B) Argon C) Helium D) Krypton

44. The most stable allotrope of phosphorus at room temperature and pressure is:

A) White phosphorus B) Red phosphorus C) Black phosphorus D) Violet phosphorus

45. Which element in Group 13 is a metalloid and a key component in semiconductors?

A) Boron B) Aluminum C) Gallium D) Indium

46. The anomalous behavior of Magnesium compared to other alkaline earth metals is NOT due to:

A) Its small atomic size B) Its high charge density C) Its low electronegativity D) Its inability to form stable hydrides

47. The general electronic configuration of s-block elements is:

A) ns¹ or ns² B) np¹ or np² C) nd¹ or nd² D) ns²np¹⁻⁶

48. Which of the following is the most reactive halogen?

A) Chlorine B) Bromine C) Iodine D) Fluorine

49. The element that forms the most acidic oxide in Group 14 is:

A) Carbon B) Silicon C) Germanium D) Tin

50. Which of the following alkaline earth metals is the most electropositive?

A) Beryllium B) Magnesium C) Calcium D) Radium

s-Block and p-Block Elements - Online Test

Test Results