3. Metals and Non-Metals

*नोट: यह सेक्शन रिवीजन के लिए है। अपना ज्ञान परखने के लिए ऊपर दिए गए क्विज़ में भाग लें।

1. Which metal is found in a liquid state at room temperature?
   A) Sodium  |  B) Mercury  |  C) Iron  |  D) Magnesium
2. The property of metals to be beaten into thin sheets is called:
   A) Ductility  |  B) Malleability  |  C) Sonority  |  D) Conductivity
3. Which is the most ductile metal (1g can be drawn into a 2km long wire)?
   A) Silver  |  B) Gold  |  C) Copper  |  D) Aluminium
4. Which is the hardest natural substance?
   A) Iron  |  B) Diamond  |  C) Graphite  |  D) Gold
5. Which metal can be easily cut with a knife?
   A) Sodium and Potassium  |  B) Magnesium  |  C) Iron  |  D) Copper
6. A non-metal that is lustrous:
   A) Sulphur  |  B) Iodine  |  C) Coal  |  D) Nitrogen
7. Electric wires are coated with which material?
   A) Sulphur  |  B) PVC  |  C) Graphite  |  D) Paint
8. Metals are ________ of heat:
   A) Insulators  |  B) Good conductors  |  C) Semiconductors  |  D) None of these
9. A non-metal that is a good conductor of electricity:
   A) Diamond  |  B) Graphite  |  C) Sulphur  |  D) Phosphorus
10. Generally, the nature of metallic oxides is:
    A) Acidic  |  B) Basic  |  C) Neutral  |  D) None of these
11. Generally, the nature of non-metallic oxides is:
    A) Basic  |  B) Acidic  |  C) Amphoteric  |  D) None of these
12. Which metal does not react with water at all?
    A) Sodium  |  B) Magnesium  |  C) Gold and Silver  |  D) Potassium
13. Pure gold is of how many carats?
    A) 18  |  B) 22  |  C) 24  |  D) 20
14. Brass is an alloy of which metals?
    A) Cu + Sn  |  B) Cu + Zn  |  C) Fe + Ni  |  D) Pb + Sn
15. Coating iron with a layer of zinc to prevent rusting is called:
    A) Roasting  |  B) Galvanization  |  C) Calcination  |  D) Smelting
16. What is an alloy of mercury called?
    A) Bronze  |  B) Amalgam  |  C) Steel  |  D) Solder
17. Food cans are coated with tin and not with zinc because:
    A) Zinc is costlier  |  B) Zinc is more reactive than tin  |  C) Tin has a higher melting point  |  D) None of these
18. Elements occurring naturally in the earth's crust are called:
    A) Ores  |  B) Minerals  |  C) Gangue  |  D) Metals
19. Cinnabar is an ore of which metal?
    A) Copper  |  B) Mercury  |  C) Iron  |  D) Zinc
20. What is added to iron to make Stainless Steel?
    A) Copper and Zinc  |  B) Nickel and Chromium  |  C) Tin and Lead  |  D) Gold
21. An example of an amphoteric oxide is:
    A) Na2O  |  B) Al2O3  |  C) MgO  |  D) K2O
22. Why is sodium kept immersed in kerosene oil?
    A) To maintain luster  |  B) To prevent its reaction with oxygen and moisture  |  C) To keep it cold  |  D) None of these
23. Which metal reacts violently with cold water and catches fire?
    A) Magnesium  |  B) Potassium and Sodium  |  C) Iron  |  D) Aluminium
24. Anodizing is the process of forming a thick oxide layer on which metal?
    A) Copper  |  B) Aluminium  |  C) Zinc  |  D) Iron
25. Which is the most reactive metal in the reactivity series?
    A) Gold  |  B) Potassium  |  C) Iron  |  D) Magnesium
26. Aqua Regia is a mixture of which two concentrated acids?
    A) HCl + H2SO4  |  B) HCl + HNO3 (3:1)  |  C) HNO3 + H2SO4  |  D) CH3COOH + HCl
27. Ionic compounds have ________ melting points:
    A) Low  |  B) High  |  C) Zero  |  D) None of these
28. The sandy impurities present in an ore are called:
    A) Ore  |  B) Gangue  |  C) Flux  |  D) Metal
29. Heating sulphide ores in the presence of excess air is called:
    A) Calcination  |  B) Roasting  |  C) Smelting  |  D) Refining
30. Heating carbonate ores in limited air is called:
    A) Roasting  |  B) Calcination  |  C) Electrolysis  |  D) Galvanization
31. Thermit reaction is used for:
    A) Washing clothes  |  B) Joining cracked railway tracks  |  C) Cooking food  |  D) None of these
32. In the electrolytic refining of copper, the impure copper is made the:
    A) Cathode  |  B) Anode  |  C) Electrolyte  |  D) None of these
33. Bronze is an alloy of:
    A) Cu + Zn  |  B) Cu + Sn  |  C) Pb + Sn  |  D) Fe + C
34. Solder alloy is used for:
    A) Making utensils  |  B) Welding electrical wires  |  C) Aeroplanes  |  D) Making coins
35. The formation of a reddish-brown flaky substance on iron is called:
    A) Galvanization  |  B) Rusting  |  C) Anodizing  |  D) None of these
36. Ionic compounds are ________ in water:
    A) Insoluble  |  B) Soluble  |  C) Colorless  |  D) None of these
37. Why does magnesium start floating when reacted with hot water?
    A) It is light  |  B) Bubbles of H2 gas stick to its surface  |  C) It does not react  |  D) None of these
38. Non-metals are generally ________ of electricity:
    A) Conductors  |  B) Insulators  |  C) Superconductors  |  D) None of these
39. Compounds formed by the transfer of electrons from a metal to a non-metal are:
    A) Covalent  |  B) Ionic compounds  |  C) Coordinate  |  D) Mixture
40. Copper develops which color coating when exposed to air?
    A) Black  |  B) Green  |  C) White  |  D) Blue
41. Aluminium is more reactive than iron, yet it is used for making utensils because:
    A) It is cheap  |  B) It forms a protective oxide layer with air  |  C) It is shiny  |  D) None of these
42. Why is H2 gas not evolved when a metal reacts with concentrated HNO3?
    A) It is a weak acid  |  B) HNO3 is a strong oxidizing agent that oxidizes H2 to water  |  C) Metal burns  |  D) None of these
43. Why do ionic compounds not conduct electricity in solid state?
    A) Due to absence of free ions  |  B) They are hot  |  C) They are hard  |  D) None of these
44. The 'Froth Floatation' method for enrichment of ores is used for:
    A) Oxide ores  |  B) Sulphide ores  |  C) Carbonate ores  |  D) Chloride ores
45. What is the effect of adding 0.05% carbon to iron?
    A) Iron becomes soft  |  B) Iron becomes hard and strong  |  C) Iron turns black  |  D) No effect
46. Which metal is always present in an Amalgam?
    A) Iron  |  B) Mercury  |  C) Gold  |  D) Silver
47. In electrolytic refining, the pure metal is deposited on the:
    A) Anode  |  B) Cathode  |  C) Bottom  |  D) Solution
48. Why do silver articles become black in air?
    A) Formation of AgO  |  B) Formation of Ag2S coating  |  C) Due to moisture  |  D) Due to sunlight
49. The method to obtain zinc oxide from zinc carbonate (ZnCO3) is:
    A) Roasting  |  B) Calcination  |  C) Reduction  |  D) None of these
50. Copper Matte mainly contains:
    A) Cu2S and FeS  |  B) CuO and FeO  |  C) Cu and Zn  |  D) Only Cu
51. Non-metals form which type of bond with hydrogen?
    A) Ionic  |  B) Covalent  |  C) Metallic  |  D) None of these
52. Why is zinc used in galvanization?
    A) It is cheap  |  B) It is more reactive than iron and provides sacrificial protection  |  C) It is beautiful  |  D) None of these
53. Why are ornaments not made of pure gold?
    A) It is expensive  |  B) It is very soft  |  C) It turns black  |  D) None of these
54. Aqueous solutions of ionic compounds conduct electricity because:
    A) They are cold  |  B) Oppositely charged ions move freely  |  C) They contain air  |  D) None of these
55. The reduction of Manganese dioxide (MnO2) with Aluminium is which type of reaction?
    A) Endothermic  |  B) Highly Exothermic  |  C) Slow  |  D) Irreversible
56. What is Anode Mud?
    A) Clean water  |  B) Insoluble impurities settled under the anode  |  C) Color of the anode  |  D) None of these
57. 22 Carat gold means:
    A) 22 parts gold + 2 parts copper/silver  |  B) 22 parts copper + 2 parts gold  |  C) Only gold  |  D) None of these
58. Which is the main ore of Aluminium?
    A) Haematite  |  B) Bauxite  |  C) Calamine  |  D) Cinnabar
59. Metals displace hydrogen from dilute acids, but which of these do not?
    A) Na, K  |  B) Cu, Ag, Au  |  C) Mg, Al  |  D) Zn, Fe
60. Why are Titanium and Chromium called 'Strategic metals'?
    A) Due to low cost  |  B) Due to high importance in defense and space equipment  |  C) Due to being very old  |  D) None of these