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non-metals. 6. What are amphoteric oxides? Gtve two examples of amphoteric oxides. 7. Namc two metals which will di

non-metals. 6. What are amphoteric oxides? Gtve two examples of amphoteric oxides. 7. Namc two metals which will di

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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What are amphoteric?
Non-metals form oxides which are either acidic to form hydrides. EXER CISES (a) Nacl solution and copper metal (b) MGCL solution and aluminium metal (c) FeSO, solution and silver metal A AgNO, solution and copper metal.V rusting? (a) Applying grease (b) Applying paint Applying a coating of zine (d) All of the above. 3. An element reacts with oxygen to give a compound with a high melting pOint, The compound is also soluble in water. The element is likely to be (a) calcium (b) carbon. (c) silicon (d) fron. 4. Food cans are coated with tin and not with zinc because (a) zinc is costlier than tin. (b) zinc has a higher melting point than tin. (c) zine is more reactive than tin (d) zinc is less reactive than tin, 5. You are given a hammer, a battery, a bulb, wires and a switch. How could you use them to distinguish between samples of metals an non-metals? (a) (b) Assess the usefulness of these tests in distinguishing between metals ant non-metals. 6. What are amphoteric oxides? Give two examples of amphoteric oxides. 7. Name two metals which will displace hydrogen from dilute acids, and two meta which will not. 58 So
Transcribed Image Text:Non-metals form oxides which are either acidic to form hydrides. EXER CISES (a) Nacl solution and copper metal (b) MGCL solution and aluminium metal (c) FeSO, solution and silver metal A AgNO, solution and copper metal.V rusting? (a) Applying grease (b) Applying paint Applying a coating of zine (d) All of the above. 3. An element reacts with oxygen to give a compound with a high melting pOint, The compound is also soluble in water. The element is likely to be (a) calcium (b) carbon. (c) silicon (d) fron. 4. Food cans are coated with tin and not with zinc because (a) zinc is costlier than tin. (b) zinc has a higher melting point than tin. (c) zine is more reactive than tin (d) zinc is less reactive than tin, 5. You are given a hammer, a battery, a bulb, wires and a switch. How could you use them to distinguish between samples of metals an non-metals? (a) (b) Assess the usefulness of these tests in distinguishing between metals ant non-metals. 6. What are amphoteric oxides? Give two examples of amphoteric oxides. 7. Name two metals which will displace hydrogen from dilute acids, and two meta which will not. 58 So
shown in figure below. Hll be the action of gas on (1) dry litmus paper? (11) moist litmus paper? Write a balanced chemical equation for the reaction taking place. (b) A pair of tongs 10. State two ways to prevent the rusting of iron. 11. What happens to potassium and sodium if they are kept in open? Why they are immersed in kerosene ? 12. (a) "Sodium is a highly reactive metal and it cannot be obtained from its oxide by heating with carbon'. Give reason. Test tutle Spatula containa sulphur powder Burner (b) How can sodium be obtained from sodium chloride ? 13. A metal 'E' is stored under kerosene oil. When a small piece of it is left open in the air, it catches fire. When the product formed is dissolved in water it turns red litmus blue. (1) Name the metal 'E'. (11) Write the chemical equation for the reaction when it is exposed to afr a when the product is dissolved in water. (iif) Explain the process by which the metal is obtained from its molten chlori 14. Most metal oxides are insoluble in water but some of these dissolve in water. W are these oxides and their solution in water called ? Mognis Collection of gas 15. How metals can be differentiated from non-metals on the basis of any three chem properties ? 16. Give reason: (a) Why do aluminium sheets not corrode easily ? (b) Why is copper vessel covered with a green coating in rainy season? 17. What type of oxides are formed when non-metals combine with oxygen? 18. Give reasons (a) Sodium, potassium and lithfum are stored under otl. Platinum, gold and silver are used to make jewellery. (b) Aluminium is a highly reactive metal, yet it is used to make utensil (c) cooking. Carbonate and sulphide ores are usually converted into oxides during (d) 19. You must have seen tarnished copper vessels being cleaned with lemon or tam juice. Explain why these sour substances are effective in cleantng the vessels process of extraction. Metals and Non-metals
Transcribed Image Text:shown in figure below. Hll be the action of gas on (1) dry litmus paper? (11) moist litmus paper? Write a balanced chemical equation for the reaction taking place. (b) A pair of tongs 10. State two ways to prevent the rusting of iron. 11. What happens to potassium and sodium if they are kept in open? Why they are immersed in kerosene ? 12. (a) "Sodium is a highly reactive metal and it cannot be obtained from its oxide by heating with carbon'. Give reason. Test tutle Spatula containa sulphur powder Burner (b) How can sodium be obtained from sodium chloride ? 13. A metal 'E' is stored under kerosene oil. When a small piece of it is left open in the air, it catches fire. When the product formed is dissolved in water it turns red litmus blue. (1) Name the metal 'E'. (11) Write the chemical equation for the reaction when it is exposed to afr a when the product is dissolved in water. (iif) Explain the process by which the metal is obtained from its molten chlori 14. Most metal oxides are insoluble in water but some of these dissolve in water. W are these oxides and their solution in water called ? Mognis Collection of gas 15. How metals can be differentiated from non-metals on the basis of any three chem properties ? 16. Give reason: (a) Why do aluminium sheets not corrode easily ? (b) Why is copper vessel covered with a green coating in rainy season? 17. What type of oxides are formed when non-metals combine with oxygen? 18. Give reasons (a) Sodium, potassium and lithfum are stored under otl. Platinum, gold and silver are used to make jewellery. (b) Aluminium is a highly reactive metal, yet it is used to make utensil (c) cooking. Carbonate and sulphide ores are usually converted into oxides during (d) 19. You must have seen tarnished copper vessels being cleaned with lemon or tam juice. Explain why these sour substances are effective in cleantng the vessels process of extraction. Metals and Non-metals
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