Class 10 Practice – Level 3 -Metals and Non-Metals – Set 1 Leave a Comment / By Gulam Hamza / July 30, 2024 Class 10 Practice - Level 3 -Metals and Non-Metals - Set 1 Total questions: 15 1. Identify the product(s) formed when Aluminium reacts with sodium hydroxide solution. Topic: Reactivity Series Aluminium hydroxide Sodium aluminate and hydrogen gas Aluminium oxide and sodium hydroxide Sodium Aluminium oxide and water None 2. Which of the following steps is involved in the extraction of copper from its Sulphide ore? Topic: Extraction of Metals Electrolysis of molten ore Reduction with carbon Roasting followed by reduction with carbon Froth flotation followed by roasting None 3. How does Sulphur dioxide act as a reducing agent in the reaction with potassium permanganate? Topic: Chemical Properties of Non-Metals By donating electrons to MnO₄⁻ By accepting electrons from MnO₄⁻ By forming sulphur trioxide By reacting with water to form sulphuric acid None 4. Which metal exhibits the highest electrical conductivity at room temperature? Topic: Physical Properties of Metals Copper Silver Gold Aluminium None 5. In the alloy brass, the percentage composition of copper is typically around: Topic: Alloys 50% 60% 70% 80% None 6. Which of the following metals will react with cold, dilute hydrochloric acid but not with concentrated nitric acid? Topic: Reactivity Series Magnesium Zinc Iron Aluminium None 7. When magnesium burns in the presence of nitrogen gas, it forms: Topic: Chemical Properties of Metals Magnesium nitride Magnesium oxide Magnesium nitrate Magnesium hydroxide None 8. The process of smelting is used to: Topic: Extraction of Metals Refine metals by electrolysis Extract metals from their ores by heating Separate metals from impurities by dissolving them in acid Concentrate ores by flotation None 9. Which of the following methods is not typically used to prevent iron from rusting? Topic: Corrosion Painting Galvanization Anodizing Coating with plastic None 10. When phosphorus reacts with chlorine gas, it forms: Topic: Chemical Properties of Non-Metals Phosphorus trichloride Phosphorus pentachloride Phosphorus oxychloride Phosphorus trioxide None 11. Which metal is used as a catalyst in the Haber process for the synthesis of ammonia? Topic: Uses of Metals Copper Iron Nickel Platinum None 12. Which allotrope of carbon is used as a lubricant and why? Topic: Physical Properties of Non- Metals Diamond, due to its hardness Graphite, due to its layered structure Fullerene, due to its spherical shape Carbon nanotubes, due to their strength None 13. Which metal, when in powdered form, burns with a white flame in air and forms a white ash? Topic: Reactivity Series Magnesium Zinc Copper Iron None 14. In the extraction of Aluminium by electrolysis of alumina, the electrolyte used is: Topic: Extraction of Metals Molten cryolite Molten bauxite Aqueous sodium chloride Aqueous copper sulphate None 15. Which non-metal is used as a semiconductor in electronic devices? Topic: Uses of Non-Metals Sulphur Phosphorus Silicon Bromine None 1 out of 15 Time's up
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