Chemistry of Group 13 Elements I Welcome to your Chemistry of Group 13 Elements I Email 1. Which of the following elements is the lightest and categorized as a metalloid in Group 13? Aluminum (Al) Gallium (Ga) Indium (In) Boron (B) 2. Which Group 13 element is the most abundant metallic element in the Earth's crust? Aluminum (Al) Gallium (Ga) Indium (In) Thallium (Tl) 3. Which Group 13 element exhibits a unique property of low viscosity when molten and can wet glass or ceramics? Boron (B) Gallium (Ga) Indium (In) Thallium (Tl) 4. Which Group 13 element is known for its ability to form alloys with other metals? Aluminum (Al) Gallium (Ga) Indium (In) Thallium (Tl) 5. Which Group 13 element is highly toxic and not actively mined or extracted due to its limited commercial significance? Aluminum (Al) Gallium (Ga) Indium (In) Thallium (Tl) 6. Which Group 13 element is widely used in the production of semiconductors, lasers, solar cells, and flat-panel displays? Aluminum (Al) Gallium (Ga) Indium (In) Boron (B) 7. Boron compounds are commonly used for which of the following applications? Transparent conductive coatings Fertilizers in agriculture Heat-resistant materials Targeted cancer therapy 8. Which Group 13 element occurs as a trace element primarily found in zinc, lead, and tin ores? Aluminum (Al) Gallium (Ga) Indium (In) Thallium (Tl) 9. Which Group 13 element is known for its exceptional hardness and high melting point? Aluminum (Al) Gallium (Ga) Indium (In) Boron (B) 10. Indium tin oxide (ITO) is commonly used in which applications? Transparent conductive coatings Solar panels Touch screens All of the above 11. What is the primary natural occurrence of boron in the Earth's crust? In its pure elemental form As borates, such as borax and colemanite Associated with aluminum and zinc ores In sulfide ores of copper, lead, and zinc 12. Which Group 13 element has been investigated for its antimicrobial properties? Aluminum (Al) Gallium (Ga) Indium (In) Thallium (Tl) 13. Thallium is primarily found in which types of minerals? Borates Silicate minerals Sulfide ores of copper, lead, and zinc Aluminum-rich ores 14. Which acid is commonly used for the leaching of borate ores in the extraction of boron? Sulfuric acid (H2SO4) Hydrochloric acid (HCl) Nitric acid (HNO3) Phosphoric acid (H3PO4) 15. The Bayer process is primarily used for the extraction of which Group 13 element? Boron (B) Aluminum (Al) Gallium (Ga) Indium (In) 16. What is the main product obtained from the calcination of aluminum hydroxide? Alumina (Al2O3) Aluminum metal Aluminum chloride (AlCl3) Aluminum oxide (AlO) 17. Gallium is often separated and purified from residues generated during the extraction of which primary metals? Zinc, lead, and tin Copper, lead, and zinc Aluminum and zinc Copper and zinc 18. What is the common reducing agent used during the smelting process for the extraction of metals, including thallium? Sodium hydroxide (NaOH) Sulfuric acid (H2SO4) Coke or carbon Hydrochloric acid (HCl) 19. What is the primary oxidation state exhibited by Group 13 elements? +1 +2 +3 +4 20. Group 13 elements generally have low electronegativity values because They have a large atomic size. They have a high effective nuclear charge. They tend to gain electrons easily. They tend to lose electrons easily. 1 out of 5 Thank you for taking Chemistry of Group 13 Elements I Time's up