CBSE Class 10 Science Metals and non metals Sure Shot Questions A

CBSE Class 10 Science Metals and non metals Sure Shot Questions A. There are many more useful educational material which the students can download in pdf format and use them for studies. Study material like concept maps, important and sure shot question banks, quick to learn flash cards, flow charts, mind maps, teacher notes, important formulas, past examinations question bank, important concepts taught by teachers. Students can download these useful educational material free and use them to get better marks in examinations.  Also refer to other worksheets for the same chapter and other subjects too. Use them for better understanding of the subjects.

METALS AND NON-METALS

1. Which metal is the best conductor of electricity?

2. Which metal is poorest conductor of electricity?

3. Which metal is best conductor of heat ?

4. Which metal other than mercury is liquid at room temperature?

5. Which metal is poorest conductor of heat?

6. What is the nature of oxides of metal?

7. What is the nature of oxides of non- metal?

8. Which non-metal conduct electricity?

9. Graphite, allotrope of carbon conduct electricity.

10. Which non-metal is lusturous?

11. Why metals are hard and have high melting point?

12. What is an amalgam?

13. What are the constituents of solder?

14. Name the green coloured compound which appears on the surface of copper utensils?

15. Why the item made of silver turns black when exposed to air?

16. Why do silver ornaments loose their shine when kept for some time?

17. Name a metal other than aluminium that is covered with an oxide film layer.

18. Name one metal and one non-metal which exists in liquid state at room temperature?

19. Name a non-metal which is lustrous and a metal which is non-lustrous.

20. Name two metal which have very low melting point.

21. If copper metal is heated over a flame, it develops a coating. What is the colour and composition of this coating?

22. Why is sodium metal kept immersed in kerosene oil?

23. Name one metal which react with very dilute HNO₃ to evolve hydrogen gas.

24. A non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y, and Z.

25. An element A form two oxides AO and AO₂.The oxide AO is neutral whereas the oxide AO₂ is acidic in nature. Would you call element A a metal or non-metal.

26. In the refining of silver the recovery of silver from silver nitrate solution involves displacement by copper metal. Give the reason for the same.

27. Name two metals which are both ductile as well as malleable. 

28. The reaction of iron (III) oxide Fe2O3 with aluminium is used to join cracked iron parts of machines.

29. Give reason for the following: (a) Ionic compounds conduct electricity in the molten state.

30. Give reason for the following: Metals can be given different shapes according to our needs.

31. How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal?

32. Which reducing agent is used in the reduction of alumina?

33. What are metalloids?

34. Why are titanium and chromium classified as strategic metals?

35. Which one of the following metals does not react with oxygen even at high temperatures?(i) Calcium (ii) Gold (iii) Sodium

36. Give reasons for the following : Addition of some silver to pure gold for makingornaments.

37. Give reason for the following: Alumina is dissolved in molten cryolite for electrolysis to obtain aluminum metal.

38. Write the chemical equation to represent the reaction taking place between sodium metaland cold water.

39. Why is tungsten metal selected for making filaments of incandescent lamp bulbs?

40. Name a metal which offer higher resistance to the passage of electricity than copper.

41. Write the chemical equation for the reaction of hot aluminium with steam.

42. How does the metal magnesium differ from the metal calcium in their reaction withwater?

43. What is seen to happen when a piece of sodium metal is dropped into water?

44. What are amphoteric oxides? Give an example.\

45. Name two metals that react with dil.HNO3 to evolve H2 gas ?

46. Why metals like potassium and sodium catch fire when treated with water?

47. Why sodium is kept immersed in kerosene oil?

48. Which gas is produced when dil. HCl is added to a reactive metal? Write the chemical reaction when iron reacts with dil. H2SO4?

49. What would you observe when zinc is added to a solution of iron(II) sulphate ?write the chemical reaction that takes place.

50. Why ionic compounds have high melting points?

51. What do you mean by roasting? How it is different from calcination? In which types of ores roasting is done?

52. Define :- (i) Ore, (ii) Mineral.

53. Name two metals which are found in nature in the free state.

54. Define :- (i) Enrichment of Ores (ii) Gangue.

55. Write short notes on electrolytic refining of metals.

56. Name the conditions which are essential for corrosion.

57. What is Galvanisation? Write its use.

58. Write suitable example, explain how a metal low in the activity series can be extracted?

59. Write three properties of ionic compounds.

60. What is anodizing? What is its use?

61. What is aqua regia? What is its use?

62. What do you mean by thermite reaction? What is its use?

63. Why active metals do not liberate H2 gas when treated with dil. HNO3?

64. Sometimes the ore itself acts as a reducing agent. Give an example.

65. An alkali metal A gives a compound B (molecular mass=40) on reacting with water .The compound B gives a soluble compound C on treatment with aluminium oxide. Identify A,

B, and C and give the reaction involved.

66. An element A burns with golden flame in air .It reacts with another element B, atomic number 17 to give a product C .An aqueous solution ofproduct C on electrolysis gives a compound D and liberates hydrogen .Identify A, B, C and D. Also write down the equations for the reactions involved.

67. A metal which is used in thermite process, when heated with oxygen gives an oxide B, which is amphoteric in nature .Identify the metal and its ore and give the reaction involved.

68. Give reasons
(i) Copper is used to make hot water tanks but steel is not.
(ii) Tarnished copper vessels being cleaned with lemon or tamarind juice.
(iii) Metal sulphides occur mainly in rocks but metal halides occur mostly in sea and lake waters.
(iv) A salt which does not conduct electricity in the solid state becomes a good conductor in molten state
(v) Why ionic compounds have high melting points?
(vi) Why sodium is kept immersed in kerosene oil?
(vii) Why metals like potassium and sodium catch fire when treated with water?
(viii) Why metals are hard and have high melting point?

69. A metal M does not liberate hydrogen from acids but reacts with oxygen to give a black colour product. Identify M and black coloured product and also explain the reaction of M with oxygen.

70. Given below are the steps for extraction of copper from its ore .Write the reaction involved
(i)Roasting of copper (I) sulphide.
(ii)Reduction of copper (I) oxide with copper (1) sulphide.
(iii) Draw a neat and well labelled diagram for electrolytic refining of copper.

71. A metal is found in liquid state in nature .It is less reactive than hydrogen .It occurs as sulphide ore .Describe the reactions how can we extract this metal from its ore .Name the ore also.

72. Explain why
(i) Aluminium cannot be extracted by reducing alumina with carbon.
(ii)Concentrated HNO3 can be stored in aluminum containers.
(iii)Aluminium is used for making transmission wires.
(iii) 24 carat gold cannot be used for making ornaments.

73. Which of the following property is generally not shown by metals?
(a) Electrical conduction
(b) Sonorous in nature
(c) Dullness
(d) Ductility

74. The ability of metals to be drawn into thin wire is known as
(a) ductility
(b) malleability
(c) sonorousity
(d) conductivity

75. Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
(a) (i) and (ii) (b) (i) and (iii)
(c) (ii) and (iii) (d) (i) and (iv)

76. Which of the following property is generally not shown by metals?
(a) Electrical conduction
(b) Sonorous in nature
(c) Dullness
(d) Ductility

77. The ability of metals to be drawn into thin wire is known as
(a) ductility
(b) malleability
(c) sonorousity
(d) conductivity

78. Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
(a) (i) and (ii) (b) (i) and (iii)
(c) (ii) and (iii) (d) (i) and (iv)

79. Which one of the following metals do not react with cold as well as hot water?
(a) Na
(b) Ca
(c) Mg
(d) Fe

80. Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?
(a) FeO
(b) Fe2O3
(c) Fe3O4
(d) Fe2O3 and Fe3O4

81. What happens when calcium is treated with water?
(i) It does not react with water
(ii) It reacts violently with water
(iii) It reacts less violently with water
(iv) Bubbles of hydrogen gas formed stick to the surface of calcium
(a) (i) and (iv) (b) (ii) and (iii)
(c) (i) and (ii) (d) (iii) and (iv)

82. Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
(a) H2SO4
(b) HCl
(c) HNO3
(d) All of these

83. The composition of aqua-regia is
(a) Dil.HCl : Conc. HNO3
3 : 1
(b) Conc.HCl : Dil. HNO3
3 : 1
(c) Conc.HCl : Conc.HNO3
3 : 1
(d) Dil.HCl : Dil.HNO3
3 : 1

Please click the link below to download CBSE Class 10 Science Metals and non metals Sure Shot Questions A.