41. The Group VIA element that is the most abundant in the Earth’s crust is:

a) Oxygen
b) Sulfur
c) Selenium
d) Tellurium
Answer: a) Oxygen

42. The oxide of phosphorus that is used in fertilizers is:

a) P₂O₅
b) P₄O₁₀
c) P₄O₇
d) P₄O₆
Answer: b) P₄O₁₀

43. The Group VA element used in the production of lead-free gasoline is:

a) Nitrogen
b) Phosphorus
c) Arsenic
d) Antimony
Answer: d)

Antimony

44. The common method for extracting sulfur from underground deposits is:

a) Frasch process
b) Sulfuric acid leaching
c) Roasting
d) Hydrometallurgy
Answer: a) Frasch process

45. The Group VIA element that forms a common compound with chlorine used in disinfectants is:

a) Oxygen
b) Sulfur
c) Selenium
d) Tellurium
Answer: b) Sulfur

46. The Group VA element used as a catalyst in various industrial processes is:

a) Nitrogen
b) Phosphorus
c) Arsenic
d) Antimony
Answer: d) Antimony

47. The common form of phosphorus used in fertilizers is:

a) Phosphoric acid
b) Phosphorus trichloride
c) Red phosphorus
d) White phosphorus
Answer: a) Phosphoric acid

48. The Group VIA element used in the production of rubber is:

a) Oxygen
b) Sulfur
c) Selenium
d) Tellurium
Answer: b) Sulfur

49. The Group VA element with the highest atomic number that is commonly used in electronics is:

a) Phosphorus
b) Arsenic
c) Antimony
d) Bismuth
Answer: d) Bismuth

50. The Group VIA element that is most commonly used in the production of semiconductors is:

a) Oxygen
b) Sulfur
c) Selenium
d) Tellurium
Answer: d) Tellurium