MATERIALS: METALS AND NON METALS 8

Practice Paper

Subject Chemistry(2019)

Class VIII                    Ch- Materials: Metals and Non-Metals                           

1. Give one example of each: metals and non-metals.
2. Name the metal, which is the best conductor of heat and electricity.
3. Name the property by virtue of which metals can be drawn into thin wires.
4. Name the gas produced, when metals reacts with acids.
5. What is the color of the copper sulphate solution?
6. State the nature of oxides of non-metals.
7. Which metal is stored in kerosene?
8. Name the property of the metal by which it can be drawn into thin sheets.
9. What happens when sulphur reacts with oxygen?
10. Which non-metal catches fire, if exposed to air?
11. Name the gas that burns with a POP sound.
12. What are displacement reactions?
13. Give one use of non-metal in our daily life.
14. What are metalloids? 
15. Which metal is use to wrap food items?
16. What happens when sulphur dioxide reacts with water? Give the chemical reaction involved.
17. Why lemon pickle cannot be stored in an aluminium foil? 
18. Write two important properties of metals.
19. Why copper cannot displace zinc from zinc sulphate solution?
20. Why immersion rods for heating liquids are made up of metallic substances?
21. What happens when iron nails are dipped in water in a test tube for a week?
22. What happens when magnesium ribbon is burnt in air?
23. In a chemistry experiment, a student by mistake put some magnesium strips in blue coloured copper sulphate solution. What 
24. change will he observe in the colour of the solution? Write the reaction also.
25. In a chemistry experiment, a student by mistake put some magnesium strips in blue coloured copper sulphate solution. What change will he observe in the colour of the solution? Write the reaction also.
26. (a)You must have seen in the laboratory that sodium metal is always stored in kerosene oil. Why is it so?(b)Name a non-metal that is very reactive and is stored in water.
27. What happens when iron reacts with oxygen and water? Give the chemical reaction involved.
28. What happens when copper vessel is exposed to moist air for a long time? Give the chemical reaction that takes place.
29. Why gold is preferred in making jewellery?
30. What happens when dilute sulphuric acid is poured on a zinc plate? Write the chemical reaction that takes place. 
31. Why metals are used in making aeroplanes, bridges, satellites etc.?
32. What will happen when ash of magnesium is dissolved in water? Is the solution acidic or basic? What effect does litmus show in case of oxides of metals?
33. (a)You must have seen in the laboratory that sodium metal is always stored in kerosene oil. Why we do so? (b)Name a non-metal that is very reactive and is stored in water.
34. Complete the following chemical reactions. 
35. Explain the following terms. (i) Malleability (ii) Ductility (iii) Sonorous (iv) Lustrous (v) Metalloids.
36. Define corrosion.
37. What happens when a copper vessel is exposed to moist air for long?
38. Which is the hardest non-metal ?
39. Name the property of non-metals by which they break into pieces by a hammer.
40. Which non-metal is lustrous?
41. Name the non metal which can conduct electricity.
42. What is the nature of non-metallic oxides?
43. Give examples of two non-metallic oxides.
44. Which non-metal catches fire, if exposed to air?
45. Write two important physical properties of non-metals.
46. Write three uses of metals.
47. Find odd one out-
48. (a) Sodium(b) Potassium(c) Magnesium(d) Phosphorous
49. Which of the following is a liquid non-metal?
50. (a) Chlorine(b) Hydrogen(c) Bromine(d) Sulphur
51. Which non-metal is essential for life?
52. Which non-metal is used as antiseptic?
53. What happens when a non-metal reacts with water?
54. Name a non-metal whose compounds are used as fertilisers?
55. Write three uses of non-metals.
56. Why metals are used in making aeroplanes and satellites etc.?
57. What is an element?
58. What are metalloids?
59. Compare the physical properties of metals and non-metal.
60. What are materials?
61. What is the basis for the classification of materials?
62. Write two types of materials.
63. Give two examples of metals.
64. Give two examples of non-metals.
65. Name the property by which metals can be drawn into thin wires.
66. Define malleability.
67. Which metal catches fire, if exposed to air?
68. What are Displacement reactions?
69. What happens when magnesium reacts with oxygen?
70. Which metal is used to wrap food items?
71. Why immersion rods , which are used for heating liquids are made up of metallic substances?
72. Find odd one out-(a) Iron(b) Silver(c) Mercury(d) Copper
73. Which gas evolves due to the reaction of a metal with dilute acid?(a) Oxygen(b) Hydrogen(c) Nitrogen(d) Carbon dioxide
74. Write the reaction of aluminium with sodium hydroxide solution.
75. What happens when iron reacts with oxygen and water? Give the chemical reaction involved.           (NCERT QUESTIONS)  👇         
76. Which of the following can be beaten into thin sheets? 
    (a) Zinc (b) Phosphorus (c) Sulphur (d) Oxygen.                               
77. Which of the following statements is correct?
    (a) All metals are ductile. (b) All non-metals are ductile. (c) Generally, metals are ductile. (d) Some non-metals are ductile.
78. Fill in the blanks :
    (a) Phosphorus is very ----------------- non-metal.
    (b) Metals are -----------------conductors of heat and .
    (c) Iron is---------------- reactive than copper.
    (d) Metals react with acids to produce -------------------gas.
79. Mark ‘T’ if the statement is true and ‘F’ if it is false.
    (a) Generally, non-metals react with acids. ( )
    (b) Sodium is a very reactive metal. ( )
    (c) Copper displaces zinc from zinc sulphate solution. ( )
    (d) Coal can be drawn into wires. ( ).
80. Give reasons for the following :
    (a) Aluminium foils are used to wrap food items.
    (b) Immersion rods for heating liquids are made up of metallic substances.
    (c) Copper cannot displace zinc from its salt solution.
    (d) Sodium and potassium are stored in kerosene.
81. Can you store lemon pickle in an aluminium utensil? Explain.
82. In the following Table some substances are given in Column I. In Column II some uses are given. Match the items in column I with those in Column II.
    Column I                                             Column II
    (i) Gold                                               (a) Thermometers
    (ii) Iron                                               (b) Electric wire
    (iii) Aluminium                                     (c) Wrapping food
    (iv) Carbon                                          (d) Jewellery
    (v) Copper                                           (e) Machinery
    (vi) Mercury                                         (f) Fuel.
83. What happens when 
    (a) Dilute sulphuric acid is poured on a copper plate? 
    (b) Iron nails are placed in copper sulphate solution?
    Write word equations of the reactions involved.
84. Saloni took a piece of burning charcoal and collected the gas evolved in a test tube. 
    (a) How will she find the nature of the gas ? 
    (b) Write down word equations of all the reactions taking place in this process.
85. One day Reeta went to a jeweller’s shop with her mother. Her mother gave old gold jewellery to the goldsmith to polish. Next day when they brought the jewellery back, they found that there was a slight loss in its weight. Can you suggest a reason for the loss in weight?