Metals and Non-Metals

METALS AND NON METALS

VERY SHORT ANSWER TYPE QUESTIONS

1. Name two metals that are both malleable and ductile. Answer : Silver and gold. 2. What happens when ZnCO3 is hea...

SHORT ANSWER TYPE QUESTIONS (SAQ)

1. Write down important properties of ionic compounds. Answer : Here are some things about ionic compounds: 1. Ionic...

2. Zinc is a metal found in the middle of the activity series of metals. In nature, it is found as a carbonate ore, ZnCO...

3. A metal 'X' acquires a green colour coating on its surface on exposure to air. (i) Identify the metal 'X' and name th...

4. Mention the names of the metals for the following: (i) Two metals which are alloyed with iron to make stainless steel...

5. Write one example of each of: (i) A metal which is so soft that, it can be cut with knife and a non-metal which is th...

6. Give reasons for the following : (i) Silicon counts among metalloids (ii) Carbon is not used for making aluminium fr...

7. (i) What is the colour of potassium dichromate solution? (ii) What is the colour of Cr3+ ion? (iii) What property of...

8. (a) Due to which property of metals is metallic foils prepared? (b) Write uses of aluminium foils Answer : (a) Me...

9. Name one non-metal and one metal, which are in a liquid state at room temperature. Answer : Bromine is a non-meta...

11. Write one example of each of the following: (i) Most malleable and most ductile metal. (ii) The best conductor of he...

12. You are provided with magnesium ribbon and sulphur powder. Explain with the help of an activity that metal oxides ar...

13. Write equations for the reactions of: (i) Iron with steam (ii) Calcium and potassium with water Answer : (i) I...

14. What is cinnabar? How is metal extracted from cinnabar? Explain briefly. Answer : Cinnabar is a substance made...

15. Define the following terms (i) Mineral (ii) Ore (iii) gangue. Answer : (i) Minerals are natural elements or co...

16. (a) State why hydrogen is said to be a clean fuel? (b) What property of hydrogen is involved in being a good fuel? (...

17. Suggest a method of reduction for the following metals during their metallurgical processes: (i) Metal 'A' which is...

18. Answer the following questions: (i) A non-metal 'X' exists in two different forms Y and Z. Y is the hardest substanc...

19. State three reasons for the following facts: (i) Sulphur is a non-metal. (ii) Magnesium is a metal : One of the reas...

20. Answer the following questions: (i) Arrange the following metals in order of their decreasing activities: Aluminium,...

21. (i) What type of oxides are formed when non-metals react with oxygen? Explain with an example. (ii) What type of oxi...

22. A metal M is found as its carbonate. It is used in the galvanization of iron. Identify 'M' and name its ore. How wil...

23. What chemical process is used for obtaining a metal from its oxide? Answer : Getting metal from its oxide depen...

24. The given reaction shows one of the processes to extract the metals like Iron and Manganese. MnO3 (s) + Al(s) Mn(1)...

25. The way, metals like sodium, magnesium and iron react with air and water is an indication of their relative position...

26. Name one metal which is extracted by : (i) Reduction with carbon. (ii) Electrolytic reduction. (iii) Reduction wit...

27. Silver articles become black when kept in open for some time, whereas copper vessels lose their shiny brown surfaces...

28. Explain the following : (i) Sodium chloride is an ionic compound which does not conduct electricity in solid state...

29. (i) What is the composition of molten slag, formed in the extraction of iron in the blast furnace? (ii) What is the...

30. Write the name of the compound, when the iron is corroded? Answer : When iron is corroded rust is formed which i...

31. How do metals react with hydrogen? Explain with an example. Answer : Only a few highly reactive metals like sodi...

32. Give reasons for the following (i) Na, K, and Ca metals form hydrides by combination with hydrogen gas, but most oth...

33. (i) Among iron and aluminium which rusts easily? (ii) What are the conditions, necessary for rusting of iron? An...

34. Name an ore of zinc other than zinc oxide. By what process can this ore be converted to zinc oxide. Answer : Zin...

35. What property of hydrogen is observed in the following experiments? (i) Balloon, filled with hydrogen, floats. (ii)...

36. Define the terms: (i) Mineral (ii) Ore (iii) Gangue Answer : (i) Mineral: It's a substance found in nature, f...

37. A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments....

38. A metal X combines with a non-metal Y by the transfer of electrons to form a compound Z: (i) State the type of bon...

39. How do you test ammonia gas? Answer : To test for ammonia gas, you can bring a drop of concentrated hydrochlori...

40. Write chemical equations for reactions taking place when (i) Cinnabar is heated in air. (ii) Concentrated sulphuric...

41. What are the uses of ammonia? Answer : (i) Ammonia is used to make fertilizers such as ammonium sulfate and amm...

42. Why do some metals like Na, K, Ca, Mg not occur in nature as free elements? Answer : Metals such as sodium (Na)...

43. Write chemical equations for reactions taking place when: (i) Manganese dioxide is heated with aluminium powder. (ii...

44. Why are metals like sodium, calcium, magnesium, aluminium etc. obtained by electrolytic reduction? Answer : Met...

46. Write short notes on the bleaching action of sulphur dioxide. Answer : (a) When there's moisture, sulfur dioxid...

47. What kind of impurities are generally found in ores? What name is given to such impurities and state the basis of re...

48. A piece of iron rusts when it comes in contact with air and moisture. Prakash had two identical shiny iron pieces P...

LONG ANSWER TYPE QUESTIONS (SAQ)

1. (i) What are metals? Name five metals. (ii) Name a metal which is so soft that it can be cut with a knife. (iii) Name...

2. Answer the following questions : (i) An ore on treatment with dilute hydrochloric acid produces brisk effervescence....

3. Give reasons for the following : (i) Silver and copper lose their shine when they are exposed to air. Name the subst...

4. Describe an activity to find out the conditions under which iron rusts. Answer : (i) Get three test tubes and p...

5. Why some metal surfaces acquire a dull appearance when they are exposed to moist air? Write colour acquired by the su...

6. Answer the following questions : (i) Explain any two physical properties of ionic compounds giving reasons. (ii) Lis...

7. Carbon cannot reduce the oxides of sodium, magnesium and aluminium to their respective metals. Why? Where are these m...

8. Describe two methods for the concentration of ores. Answer : Two methods used for separation of ores are : 1. Fro...

9. Answer the following questions: (i) What is meant by the reactivity series of metals? Arrange the following metals in...

10. (a) Define corrosion. (b) What is corrosion of iron called? (c) How will you recognise the corrosion of silver? (d)...

11. Answer the following questions: (i) Define the term alloy and amalgam. name the alloy used for welding electric wi...

12. (a) Metals like iron, silver and copper get corroded on exposure to air. Write the chemical name of the substance de...

13. (a) What is meant by corrosion? Name any two methods used for the prevention of corrosion. (b) Suppose you have to e...

14. Why is it that iron does not occur as a metal in the crust of the earth? What are the common compound forms in which...

15. (a) Write the chemical name of the coating that forms on silver and copper articles when these are left exposed to m...

16. Give reasons for the following : (i) Silver and copper lose their shine when they are exposed to air. Name the sub...

NCERT SOLUTION

1. Give an example of a metal which (i) is a liquid at room temperature. (ii) can be easily cu...

Page No. 46 1. Why is sodium kept immersed in kerosene oil? Answer: Sodium is a highly reac...

Page No. 46 3. Samples of four metals A, B, C, and D were taken and added to the following solut...

Page No. 46 4. Which gas is produced when dilute hydrochloric acid is added to a reactive metal?...

Page No. 49 2. Why do ionic compounds have high melting points? Answer : Io...

Page No. 53 1. Define the following terms: (i) Mineral (ii) Ore (iii) Gangue...

Page No. 55 1. Metallic oxides of zinc, magnesium, and copper were heated with the following metals....

1. Which of the following pairs will give displacement reactions? (a) NaCl solution and copper metal...

Excercise - Page No. 56 14. Differentiate between metals and non-metals on the basis of their chemical properties....

Excercise - Page No. 56 15. A man went door-to-door posing as a goldsmith. He promised to bring back the glitter of...