{"id":12822,"date":"2025-09-23T13:08:27","date_gmt":"2025-09-23T12:08:27","guid":{"rendered":"https:\/\/mcqsadda.com\/?p=12822"},"modified":"2025-10-22T10:39:55","modified_gmt":"2025-10-22T09:39:55","slug":"metals-and-non-metals-top-100-mcqs-with-answer-and-explanation","status":"publish","type":"post","link":"https:\/\/mcqsadda.com\/index.php\/2025\/09\/23\/metals-and-non-metals-top-100-mcqs-with-answer-and-explanation\/","title":{"rendered":"Metals and non-metals Top 100 MCQs With Answer and Explanation"},"content":{"rendered":"\n

1. Metals are generally:<\/mark><\/strong>
A) Good conductors of heat and electricity
B) Bad conductors of electricity
C) Non-malleable
D) Brittle
Answer:<\/strong> A
Explanation:<\/strong> Metals conduct heat and electricity due to free electrons.<\/p>\n\n\n\n

2. Non-metals are generally:<\/mark><\/strong>
A) Malleable and ductile
B) Lustrous
C) Brittle and poor conductors
D) Good conductors
Answer:<\/strong> C
Explanation:<\/strong> Non-metals are brittle and poor conductors.<\/p>\n\n\n\n

3. Which of the following is a liquid metal at room temperature?
<\/mark><\/strong>A) Na
B) Hg
C) Ga
D) Pb
Answer:<\/strong> B
Explanation:<\/strong> Mercury (Hg) is the only liquid metal at room temp.<\/p>\n\n\n\n

4. Which non-metal is liquid at room temperature?
<\/mark><\/strong>A) Oxygen
B) Bromine
C) Chlorine
D) Nitrogen
Answer:<\/strong> B
Explanation:<\/strong> Bromine (Br\u2082) is a liquid non-metal at room temp.<\/p>\n\n\n\n

5. Which metal is the lightest?
<\/mark><\/strong>A) Sodium
B) Potassium
C) Lithium
D) Calcium
Answer:<\/strong> C
Explanation:<\/strong> Lithium is the lightest metal.<\/p>\n\n\n\n

6. Which is the heaviest non-metal element?
<\/mark><\/strong>A) Iodine
B) Bromine
C) Astatine
D) Sulphur
Answer:<\/strong> C
Explanation:<\/strong> Astatine is the heaviest halogen (non-metal).<\/p>\n\n\n\n

7. Which metal is known as \u2018liquid silver\u2019?
<\/mark><\/strong>A) Lead
B) Mercury
C) Platinum
D) Nickel
Answer:<\/strong> B
Explanation:<\/strong> Mercury is shiny and liquid \u2192 called liquid silver.<\/p>\n\n\n\n

8. Which metal is the best conductor of electricity?
<\/mark><\/strong>A) Copper
B) Aluminium
C) Silver
D) Gold
Answer:<\/strong> C
Explanation:<\/strong> Silver is the best conductor, though copper is used widely due to cost.<\/p>\n\n\n\n

9. Which non-metal is a good conductor of electricity?
<\/mark><\/strong>A) Sulphur
B) Graphite
C) Phosphorus
D) Nitrogen
Answer:<\/strong> B
Explanation:<\/strong> Graphite (form of carbon) conducts electricity.<\/p>\n\n\n\n

10. Metals are generally:
<\/mark><\/strong>A) Acidic oxides formers
B) Basic oxides formers
C) Neutral oxides formers
D) Amphoteric always
Answer:<\/strong> B
Explanation:<\/strong> Metal oxides are generally basic (e.g., Na\u2082O, CaO).<\/p>\n\n\n\n

11. Non-metal oxides are usually:
<\/mark><\/strong>A) Basic
B) Acidic
C) Neutral
D) Salts
Answer:<\/strong> B
Explanation:<\/strong> Non-metal oxides like SO\u2082, CO\u2082 are acidic.<\/p>\n\n\n\n

12. Amphoteric oxides are those which:
<\/mark><\/strong>A) Are neutral
B) Show both acidic and basic properties
C) Are only acidic
D) Are only basic
Answer:<\/strong> B
Explanation:<\/strong> Amphoteric oxides (Al\u2082O\u2083, ZnO) react with both acids and bases.<\/p>\n\n\n\n

13. Which of the following is an amphoteric oxide?
<\/mark><\/strong>A) Na\u2082O
B) SO\u2082
C) Al\u2082O\u2083
D) CO\u2082
Answer:<\/strong> C
Explanation:<\/strong> Al\u2082O\u2083 is amphoteric.<\/p>\n\n\n\n

14. The property of being hammered into sheets is called:
<\/mark><\/strong>A) Ductility
B) Brittleness
C) Malleability
D) Conductivity
Answer:<\/strong> C
Explanation:<\/strong> Metals are malleable \u2192 hammered into sheets.<\/p>\n\n\n\n

15. The property of being drawn into wires is called:
<\/mark><\/strong>A) Ductility
B) Malleability
C) Brittleness
D) Rigidity
Answer:<\/strong> A
Explanation:<\/strong> Metals are ductile \u2192 can be drawn into wires.<\/p>\n\n\n\n

16. Which non-metal shows allotropy in diamond and graphite forms?<\/mark>
<\/strong>A) Sulphur
B) Phosphorus
C) Carbon
D) Oxygen
Answer:<\/strong> C
Explanation:<\/strong> Carbon has diamond, graphite, fullerene allotropes.<\/p>\n\n\n\n

17. Which metal is used for making lightweight aircraft bodies?
<\/mark><\/strong>A) Fe
B) Al
C) Cu
D) Ag
Answer:<\/strong> B
Explanation:<\/strong> Aluminium is light, strong, corrosion resistant.<\/p>\n\n\n\n

18. Which non-metal is essential for respiration?
<\/mark><\/strong>A) Nitrogen
B) Hydrogen
C) Oxygen
D) Carbon
Answer:<\/strong> C
Explanation:<\/strong> Oxygen is inhaled for respiration.<\/p>\n\n\n\n

19. Which non-metal is used in making matchsticks?
<\/mark><\/strong>A) Phosphorus
B) Sulphur
C) Carbon
D) Nitrogen
Answer:<\/strong> A
Explanation:<\/strong> Red phosphorus is used in matchsticks.<\/p>\n\n\n\n

20. Which metal is used in making thermometers?
<\/mark><\/strong>A) Hg
B) Pb
C) Zn
D) Sn
Answer:<\/strong> A
Explanation:<\/strong> Mercury is used in thermometers.<\/p>\n\n\n\n

21. Which non-metal is used in vulcanization of rubber?
<\/mark><\/strong>A) Nitrogen
B) Oxygen
C) Sulphur
D) Chlorine
Answer:<\/strong> C
Explanation:<\/strong> Sulphur makes rubber stronger by vulcanization.<\/p>\n\n\n\n

22. Which metal is used for making electrical wires?
<\/mark><\/strong>A) Ag
B) Cu
C) Al
D) Both B and C
Answer:<\/strong> D
Explanation:<\/strong> Copper and aluminium are commonly used in electrical wires.<\/p>\n\n\n\n

23. Which metal is liquid at slightly above room temperature (30 \u00b0C)?
<\/mark><\/strong>A) Mercury
B) Gallium
C) Sodium
D) Potassium
Answer:<\/strong> B
Explanation:<\/strong> Gallium melts at 29.8 \u00b0C.<\/p>\n\n\n\n

24. Which non-metal is used in making antiseptics like tincture iodine?
<\/mark><\/strong>A) Chlorine
B) Bromine
C) Iodine
D) Sulphur
Answer:<\/strong> C
Explanation:<\/strong> Iodine is used as an antiseptic.<\/p>\n\n\n\n

25. Which non-metal is essential for fertilizers?
<\/mark><\/strong>A) Oxygen
B) Hydrogen
C) Nitrogen
D) Carbon
Answer:<\/strong> C
Explanation:<\/strong> Nitrogen compounds (urea, ammonium salts) are fertilizers.<\/p>\n\n\n\n

26. Metals react with oxygen to form:
<\/mark><\/strong>A) Acidic oxides
B) Basic oxides
C) Neutral oxides
D) None
Answer:<\/strong> B
Explanation:<\/strong> Metal oxides are generally basic in nature (e.g., Na\u2082O, CaO).<\/p>\n\n\n\n

27. Non-metals react with oxygen to form:
<\/mark><\/strong>A) Basic oxides
B) Amphoteric oxides
C) Acidic oxides
D) Salts
Answer:<\/strong> C
Explanation:<\/strong> Non-metal oxides like CO\u2082, SO\u2082, P\u2082O\u2085 are acidic.<\/p>\n\n\n\n

28. Which metal does not react with oxygen even at high temperature?<\/mark>
<\/strong>A) Gold
B) Copper
C) Magnesium
D) Zinc
Answer:<\/strong> A
Explanation:<\/strong> Noble metals like gold and platinum resist oxidation.<\/p>\n\n\n\n

29. Which metal burns with dazzling white flame in air?<\/mark><\/strong>
A) Copper
B) Magnesium
C) Aluminium
D) Sodium
Answer:<\/strong> B
Explanation:<\/strong> Magnesium burns with a bright white flame in oxygen.<\/p>\n\n\n\n

30. Non-metals generally react with oxygen to form:<\/mark><\/strong>
A) Neutral oxides
B) Acidic oxides
C) Basic salts
D) Alloys
Answer:<\/strong> B
Explanation:<\/strong> CO\u2082, SO\u2082 are acidic oxides.<\/p>\n\n\n\n

31. Sodium reacts vigorously with water to form:
<\/mark><\/strong>A) NaOH and H\u2082
B) Na\u2082O and H\u2082
C) Na\u2082CO\u2083 and O\u2082
D) NaHCO\u2083 and CO\u2082
Answer:<\/strong> A
Explanation:<\/strong> 2Na + 2H\u2082O \u2192 2NaOH + H\u2082.<\/p>\n\n\n\n

32. Which alkaline earth metal reacts less vigorously with water?
<\/mark><\/strong>A) Sodium
B) Magnesium
C) Calcium
D) Potassium
Answer:<\/strong> B
Explanation:<\/strong> Magnesium reacts slowly with cold water but faster with hot water.<\/p>\n\n\n\n

33. Which metal reacts explosively with water?
<\/mark><\/strong>A) Magnesium
B) Potassium
C) Zinc
D) Aluminium
Answer:<\/strong> B
Explanation:<\/strong> Potassium reacts violently with water, producing hydrogen and heat.<\/p>\n\n\n\n

34. Which metal is stored under kerosene to prevent reaction with air\/water?
<\/mark><\/strong>A) Aluminium
B) Zinc
C) Sodium
D) Copper
Answer:<\/strong> C
Explanation:<\/strong> Alkali metals (Na, K) are highly reactive \u2192 stored in kerosene.<\/p>\n\n\n\n

35. Which non-metal reacts with water to form acidic solution?
<\/mark><\/strong>A) Chlorine
B) Nitrogen
C) Phosphorus
D) Sulphur
Answer:<\/strong> A
Explanation:<\/strong> Cl\u2082 + H\u2082O \u2192 HCl + HOCl (acidic solution).<\/p>\n\n\n\n

36. Metals generally react with acids to form:
<\/mark><\/strong>A) Salt and hydrogen gas
B) Salt and oxygen
C) Base and CO\u2082
D) Only salts
Answer:<\/strong> A
Explanation:<\/strong> Metal + Acid \u2192 Salt + H\u2082 (except Cu, Ag, Au).<\/p>\n\n\n\n

37. Which gas is liberated when Zn reacts with dilute HCl?
<\/mark><\/strong>A) CO\u2082
B) O\u2082
C) H\u2082
D) SO\u2082
Answer:<\/strong> C
Explanation:<\/strong> Zn + 2HCl \u2192 ZnCl\u2082 + H\u2082.<\/p>\n\n\n\n

38. Which metals do not liberate hydrogen with dilute acids?
<\/mark><\/strong>A) Zn, Fe
B) Cu, Ag
C) Mg, Ca
D) Na, K
Answer:<\/strong> B
Explanation:<\/strong> Cu, Ag, Au are below hydrogen in reactivity series \u2192 do not react with dilute acids.<\/p>\n\n\n\n

39. Which non-metal reacts with H\u2082 to form ammonia?
<\/mark><\/strong>A) Oxygen
B) Nitrogen
C) Sulphur
D) Chlorine
Answer:<\/strong> B
Explanation:<\/strong> N\u2082 + 3H\u2082 \u2192 2NH\u2083 (Haber process).<\/p>\n\n\n\n

40. Non-metals generally react with hydrogen to form:
<\/mark><\/strong>A) Hydrides
B) Salts
C) Metals
D) Bases
Answer:<\/strong> A
Explanation:<\/strong> Example: NH\u2083, HCl, H\u2082S.<\/p>\n\n\n\n

41. Which metal reacts with both acids and bases to form salts?
<\/mark><\/strong>A) Copper
B) Aluminium
C) Sodium
D) Zinc
Answer:<\/strong> B
Explanation:<\/strong> Al is amphoteric \u2192 reacts with acids and bases.<\/p>\n\n\n\n

42. Which of the following is an amphoteric metal?<\/strong>
<\/mark>A) Al
B) Zn
C) Sn
D) All of these
Answer:<\/strong> D
Explanation:<\/strong> Al, Zn, Sn all show amphoteric nature.<\/p>\n\n\n\n

43. Amphoteric oxides react with:
<\/mark><\/strong>A) Only acids
B) Only bases
C) Both acids and bases
D) Neithe
Answer:<\/strong> C
Explanation:<\/strong> Example: Al\u2082O\u2083 reacts with HCl and NaOH.<\/p>\n\n\n\n

44. Reaction of chlorine gas with cold water gives:
<\/mark><\/strong>A) HCl only
B) HOCl only
C) HCl + HOCl
D) NaCl
Answer:<\/strong> C
Explanation:<\/strong> Cl\u2082 + H\u2082O \u2192 HCl + HOCl.<\/p>\n\n\n\n

45. Which non-metal reacts with hot concentrated H\u2082SO\u2084 to form SO\u2082?
<\/mark><\/strong>A) Carbon
B) Phosphorus
C) Sulphur
D) Iodine
Answer:<\/strong> D
Explanation:<\/strong> I\u2082 + conc. H\u2082SO\u2084 \u2192 I\u2082O + SO\u2082 (redox reaction).<\/p>\n\n\n\n

46. Which metal reacts with steam to form hydrogen gas?
<\/mark><\/strong>A) Gold
B) Copper
C) Iron
D) Silver
Answer:<\/strong> C
Explanation:<\/strong> 3Fe + 4H\u2082O (steam) \u2192 Fe\u2083O\u2084 + 4H\u2082.<\/p>\n\n\n\n

47. Which metal reacts with bases to form complex salts?
<\/mark><\/strong>A) Zn
B) Cu
C) Ag
D) Na
Answer:<\/strong> A
Explanation:<\/strong> Zn + 2NaOH \u2192 Na\u2082ZnO\u2082 + H\u2082 (sodium zincate).<\/p>\n\n\n\n

48. Reaction of non-metals with alkali forms:
<\/mark><\/strong>A) Basic salts
B) Complex salts
C) Oxyanions
D) Nothing
Answer:<\/strong> C
Explanation:<\/strong> Example: Cl\u2082 + NaOH \u2192 NaCl + NaClO (oxyanions).<\/p>\n\n\n\n

49. Which non-metal reacts with lime water turning it milky?
<\/mark><\/strong>A) SO\u2082
B) CO\u2082
C) NO\u2082
D) Cl\u2082
Answer:<\/strong> B
Explanation:<\/strong> CO\u2082 + Ca(OH)\u2082 \u2192 CaCO\u2083 (white precipitate).<\/p>\n\n\n\n

50. Which of the following metals reacts violently with acids and water?
<\/mark><\/strong>A) Fe
B) Zn
C) Na
D) Cu
Answer:<\/strong> C
Explanation:<\/strong> Sodium reacts vigorously with acids and water producing H\u2082.<\/p>\n\n\n\n

51. The process of extracting pure metal from its ore is called:
<\/mark><\/strong>A) Metallurgy
B) Crystallization
C) Sublimation
D) Distillation
Answer:<\/strong> A
Explanation:<\/strong> Metallurgy involves extraction and purification of metals from ores.<\/p>\n\n\n\n

52. Aluminium is extracted from which ore?
<\/mark><\/strong>A) Hematite
B) Bauxite
C) Galena
D) Chalcopyrite
Answer:<\/strong> B
Explanation:<\/strong> The chief ore of aluminium is bauxite (Al\u2082O\u2083\u00b72H\u2082O).<\/p>\n\n\n\n

53. The chief ore of iron is:
<\/mark><\/strong>A) Bauxite
B) Hematite
C) Galena
D) Zinc blende
Answer:<\/strong> B
Explanation:<\/strong> Hematite (Fe\u2082O\u2083) is the main ore of iron.<\/p>\n\n\n\n

54. Galena is an ore of:
<\/mark><\/strong>A) Zinc
B) Lead
C) Copper
D) Aluminium
Answer:<\/strong> B
Explanation:<\/strong> Galena (PbS) is the chief ore of lead.<\/p>\n\n\n\n

55. Zinc is extracted from:
<\/mark><\/strong>A) Galena
B) Zinc blende
C) Bauxite
D) Malachite
Answer:<\/strong> B
Explanation:<\/strong> Zinc blende (ZnS) is the ore of zinc.<\/p>\n\n\n\n

56. The purest form of iron is:<\/strong><\/mark>
A) Pig iron
B) Wrought iron
C) Steel
D) Cast iron
Answer:<\/strong> B
Explanation:<\/strong> Wrought iron is the purest form (~99.9% Fe).<\/p>\n\n\n\n

57. Stainless steel is an alloy of:<\/mark><\/strong>
A) Fe + C + Cr + Ni
B) Fe + C + Mn
C) Fe + Cu + Ni
D) Fe + Zn
Answer:<\/strong> A
Explanation:<\/strong> Stainless steel contains iron, carbon, chromium, and nickel.<\/p>\n\n\n\n

58. Bronze is an alloy of:<\/mark><\/strong>
A) Cu + Zn
B) Cu + Sn
C) Cu + Al
D) Cu + Ni
Answer:<\/strong> B
Explanation:<\/strong> Bronze is made of copper and tin.<\/p>\n\n\n\n

59. Brass is an alloy of:<\/mark><\/strong>
A) Cu + Zn
B) Cu + Sn
C) Cu + Ni
D) Cu + Pb
Answer:<\/strong> A
Explanation:<\/strong> Brass = Copper + Zinc.<\/p>\n\n\n\n

60. Duralumin is an alloy of:<\/strong><\/mark>
A) Al + Cu + Mg + Mn
B) Al + Zn + Fe
C) Al + Ni + Cr
D) Al + Pb + Sn
Answer:<\/strong> A
Explanation:<\/strong> Duralumin is a strong, lightweight alloy used in aircraft.<\/p>\n\n\n\n

61. Which metal is used in galvanization?<\/mark><\/strong>
A) Fe
B) Zn
C) Cu
D) Sn
Answer:<\/strong> B
Explanation:<\/strong> Galvanization is coating iron with zinc.<\/p>\n\n\n\n

62. Which metal is used for electroplating food containers to prevent rusting?<\/mark><\/strong>
A) Sn
B) Cu
C) Zn
D) Al
Answer:<\/strong> A
Explanation:<\/strong> Tin coating prevents corrosion and is safe for food storage.<\/p>\n\n\n\n

63. Which metal is used in making electrical cables and cooking utensils?
<\/mark><\/strong>A) Ag
B) Cu
C) Al
D) Both B and C
Answer:<\/strong> D
Explanation:<\/strong> Copper and aluminium are widely used in utensils and wires.<\/p>\n\n\n\n

64. Which metal is used in making filaments of electric bulbs?
<\/mark><\/strong>A) Cu
B) Fe
C) W
D) Al
Answer:<\/strong> C
Explanation:<\/strong> Tungsten (W) has high melting point \u2192 used in bulbs.<\/p>\n\n\n\n

65. Which non-metal is used in vulcanization of rubber?
<\/mark><\/strong>A) Oxygen
B) Sulphur
C) Nitrogen
D) Phosphorus
Answer:<\/strong> B
Explanation:<\/strong> Sulphur cross-links rubber molecules, improving strength.<\/p>\n\n\n\n

66. Which non-metal is used in making safety matches?
<\/mark><\/strong>A) Carbon
B) Sulphur
C) Phosphorus
D) Iodine
Answer:<\/strong> C
Explanation:<\/strong> Red phosphorus is used in matchstick heads.<\/p>\n\n\n\n

67. Which non-metal is used as an antiseptic?
<\/mark><\/strong>A) Chlorine
B) Bromine
C) Iodine
D) Nitrogen
Answer:<\/strong> C
Explanation:<\/strong> Iodine solution (tincture iodine) is an antiseptic.<\/p>\n\n\n\n

68. Which metal is used in making thermometers and barometers?
<\/mark><\/strong>A) Al
B) Cu
C) Hg
D) Pb
Answer:<\/strong> C
Explanation:<\/strong> Mercury (Hg) is liquid and expands uniformly with temperature.<\/p>\n\n\n\n

69. Which non-metal is used in disinfecting drinking water?
<\/mark><\/strong>A) Nitrogen
B) Oxygen
C) Chlorine
D) Iodine
Answer:<\/strong> C
Explanation:<\/strong> Chlorine kills germs in water.<\/p>\n\n\n\n

70. Which metal is used in amalgam fillings for teeth?
<\/mark><\/strong>A) Ag
B) Au
C) Hg
D) Zn
Answer:<\/strong> C
Explanation:<\/strong> Mercury forms amalgams with other metals for dental fillings.<\/p>\n\n\n\n

71. Which non-metal is a constituent of proteins?
<\/mark><\/strong>A) Phosphorus
B) Sulphur
C) Oxygen
D) Iodine
Answer:<\/strong> B
Explanation:<\/strong> Sulphur is present in amino acids like cysteine and methionine.<\/p>\n\n\n\n

72. The main component of bleaching powder is:
<\/mark><\/strong>A) CaSO\u2084
B) Ca(OCl)\u2082
C) CaCl\u2082
D) CaCO\u2083
Answer:<\/strong> B
Explanation:<\/strong> Bleaching powder = calcium oxychloride Ca(OCl)\u2082.<\/p>\n\n\n\n

73. Which metal is used in making aircraft bodies?
<\/mark><\/strong>A) Iron
B) Aluminium
C) Copper
D) Lead
Answer:<\/strong> B
Explanation:<\/strong> Aluminium is light and corrosion-resistant.<\/p>\n\n\n\n

74. The main component of baking soda is:
<\/mark><\/strong>A) NaCl
B) Na\u2082CO\u2083
C) NaHCO\u2083
D) NaOH
Answer:<\/strong> C
Explanation:<\/strong> Baking soda = Sodium bicarbonate NaHCO\u2083.<\/p>\n\n\n\n

75. Which metal is used in making photo films (traditional)?
<\/mark><\/strong>A) Ag
B) Cu
C) Zn
D) Pb
Answer:<\/strong> A
Explanation:<\/strong> Silver salts (AgBr, AgCl) are light-sensitive and used in films.<\/p>\n\n\n\n

76. The green coating on copper articles is due to:
<\/mark><\/strong>A) CuO
B) CuCO\u2083\u00b7Cu(OH)\u2082
C) CuSO\u2084
D) CuCl\u2082
Answer:<\/strong> B
Explanation:<\/strong> Copper reacts with CO\u2082 and H\u2082O \u2192 basic copper carbonate, giving a green layer.<\/p>\n\n\n\n

77. Rusting of iron is:
<\/mark><\/strong>A) Only oxidation
B) Only reduction
C) Both oxidation and reduction
D) A physical change
Answer:<\/strong> C
Explanation:<\/strong> Rusting is a redox reaction: Fe oxidizes, O\u2082 reduced.<\/p>\n\n\n\n

78. Which metal does not corrode in air?
<\/mark><\/strong>A) Cu
B) Ag
C) Au
D) Fe
Answer:<\/strong> C
Explanation:<\/strong> Noble metals like gold and platinum resist corrosion.<\/p>\n\n\n\n

79. Which non-metal prevents food spoilage by acting as an antioxidant?
<\/mark><\/strong>A) Sulphur
B) Nitrogen
C) Phosphorus
D) Oxygen
Answer:<\/strong> B
Explanation:<\/strong> Nitrogen is inert and used in food packaging to prevent oxidation.<\/p>\n\n\n\n

80. Which metal is obtained from the electrolytic refining process?
<\/mark><\/strong>A) Copper
B) Iron
C) Sodium
D) Zinc
Answer:<\/strong> A
Explanation:<\/strong> Copper is purified by electrolytic refining.<\/p>\n\n\n\n

81. Which gas is produced when carbon reacts with concentrated sulphuric acid?<\/mark>
<\/strong>A) CO\u2082
B) CO
C) SO\u2082
D) H\u2082S
Answer:<\/strong> C
Explanation:<\/strong> C + 2H\u2082SO\u2084 \u2192 CO\u2082 + 2SO\u2082 + 2H\u2082O.<\/p>\n\n\n\n

82. Which metal is used in nuclear reactors as a moderator?
<\/mark><\/strong>A) Lead
B) Cadmium
C) Beryllium
D) Aluminium
Answer:<\/strong> C
Explanation:<\/strong> Beryllium (and also graphite) is used as moderator.<\/p>\n\n\n\n

83. Which metal is used for making thin foils for packaging?
<\/mark><\/strong>A) Copper
B) Aluminium
C) Iron
D) Nickel
Answer:<\/strong> B
Explanation:<\/strong> Aluminium is malleable and used for foils.<\/p>\n\n\n\n

84. Which non-metal exists in rhombic and monoclinic forms?
<\/mark><\/strong>A) Oxygen
B) Carbon
C) Sulphur
D) Phosphorus
Answer:<\/strong> C
Explanation:<\/strong> Sulphur shows allotropy: rhombic and monoclinic.<\/p>\n\n\n\n

85. Which allotrope of carbon is the hardest natural substance?
<\/mark><\/strong>A) Graphite
B) Diamond
C) Fullerene
D) Charcoal
Answer:<\/strong> B
Explanation:<\/strong> Diamond is the hardest natural material.<\/p>\n\n\n\n

86. Which form of carbon is used as a lubricant?
<\/mark><\/strong>A) Diamond
B) Graphite
C) Charcoal
D) Fullerene
Answer:<\/strong> B
Explanation:<\/strong> Graphite layers slide easily \u2192 used as lubricant.<\/p>\n\n\n\n

87. Which non-metal is essential for thyroid function in humans?
<\/mark><\/strong>A) Chlorine
B) Iodine
C) Phosphorus
D) Sulphur
Answer:<\/strong> B
Explanation:<\/strong> Iodine is essential for thyroid hormone (thyroxine).<\/p>\n\n\n\n

88. Which metal causes \u201cblue baby syndrome\u201d if present in drinking water?
<\/mark><\/strong>A) Iron
B) Lead
C) Nitrate (from fertilizers)
D) Mercury
Answer:<\/strong> C
Explanation:<\/strong> Excess nitrates in water reduce oxygen transport in infants.<\/p>\n\n\n\n

89. Which metal causes lead poisoning?<\/mark><\/strong>
A) Pb
B) Cu
C) Zn
D) Fe
Answer:<\/strong> A
Explanation:<\/strong> Lead is toxic, causing neurological disorders.<\/p>\n\n\n\n

90. Which metal causes Minamata disease?
<\/mark><\/strong>A) Lead
B) Mercury
C) Cadmium
D) Arsenic
Answer:<\/strong> B
Explanation:<\/strong> Mercury pollution caused Minamata disease in Japan.<\/p>\n\n\n\n

91. Which non-metal causes acid rain when released as oxide?
<\/mark><\/strong>A) Sulphur
B) Nitrogen
C) Both A and B
D) Phosphorus
Answer:<\/strong> C
Explanation:<\/strong> SO\u2082 and NOx combine with water \u2192 acid rain.<\/p>\n\n\n\n

92. Which metal is used in cathode ray tubes and television screens?
<\/mark><\/strong>A) Pb
B) Al
C) Zn
D) Fe
Answer:<\/strong> A
Explanation:<\/strong> Lead shields against harmful radiation.<\/p>\n\n\n\n

93. Which gas is produced when carbonates react with acids?<\/mark>
<\/strong>A) H\u2082
B) O\u2082
C) CO\u2082
D) SO\u2082
Answer:<\/strong> C
Explanation:<\/strong> Example: CaCO\u2083 + HCl \u2192 CaCl\u2082 + CO\u2082 + H\u2082O.<\/p>\n\n\n\n

94. Which metal is used for making aircraft and missile bodies due to high strength-to-weight ratio?
<\/mark><\/strong>A) Titanium
B) Aluminium
C) Iron
D) Copper
Answer:<\/strong> A
Explanation:<\/strong> Titanium alloys are strong, light, and corrosion-resistant.<\/p>\n\n\n\n

95. Which non-metal is used in fertilizers as urea?
<\/mark><\/strong>A) Sulphur
B) Nitrogen
C) Oxygen
D) Phosphorus
Answer:<\/strong> B
Explanation:<\/strong> Urea (NH\u2082CONH\u2082) supplies nitrogen to plants.<\/p>\n\n\n\n

96. Which non-metal is used in red signal flares?
<\/mark><\/strong>A) Phosphorus
B) Sulphur
C) Strontium compounds
D) Iodine
Answer:<\/strong> C
Explanation:<\/strong> Strontium salts impart red color to flares.<\/p>\n\n\n\n

97. Which is the most abundant metal in Earth\u2019s crust?
<\/mark><\/strong>A) Iron
B) Aluminium
C) Calcium
D) Sodium
Answer:<\/strong> B
Explanation:<\/strong> Aluminium is the most abundant metal (~8%).<\/p>\n\n\n\n

98. Which is the most abundant non-metal in Earth\u2019s crust?
<\/mark><\/strong>A) Carbon
B) Oxygen
C) Nitrogen
D) Sulphur
Answer:<\/strong> B
Explanation:<\/strong> Oxygen (~47%) is the most abundant non-metal in Earth\u2019s crust.<\/p>\n\n\n\n

99. Which non-metal is used in making explosives?
<\/mark><\/strong>A) Sulphur
B) Nitrogen compounds
C) Phosphorus
D) All of the above
Answer:<\/strong> D
Explanation:<\/strong> Explosives (TNT, gunpowder) contain sulphur, nitrogen, and phosphorus.<\/p>\n\n\n\n

100. Which statement is correct about metals and non-metals?
<\/mark><\/strong>A) Metals form acidic oxides, non-metals form basic oxides
B) Metals are ductile, non-metals are brittle
C) Non-metals are lustrous, metals are dull
D) Metals are bad conductors, non-metals are good conductors
Answer:<\/strong> B
Explanation:<\/strong> Metals \u2192 ductile, malleable, good conductors; Non-metals \u2192 brittle, poor conductors.<\/p>\n","protected":false},"excerpt":{"rendered":"

1. Metals are generally:A) Good conductors of heat and electricityB) Bad conductors of electricityC) Non-malleableD) BrittleAnswer: AExplanation: Metals conduct heat and electricity due to free electrons. 2. Non-metals are generally:A) Malleable and ductileB) LustrousC) Brittle and poor conductorsD) Good conductorsAnswer: CExplanation: Non-metals are brittle and poor conductors. 3. Which of the following is a liquid<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[16123,16117,16124,15886,15892,15876,15898,15901,15887,15899,15879,15883,16127,16106,16129,4029,15897,16121,16126,16025,16118,16128,16122,15950,16125,16119,15900,16120,15896,15894],"class_list":{"0":"post-12822","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-chemistry","7":"tag-alloys","8":"tag-chemical-properties-of-metals","9":"tag-chemical-properties-of-non-metals","10":"tag-chemistry-formulas","11":"tag-chemistry-learning","12":"tag-chemistry-mcqs","13":"tag-chemistry-preparation-material","14":"tag-chemistry-questions-and-answers","15":"tag-chemistry-quiz","16":"tag-chemistry-revision","17":"tag-chemistry-study-material","18":"tag-competitive-exam-chemistry","19":"tag-corrosion","20":"tag-displacement-reactions","21":"tag-ionic-and-covalent-compounds","22":"tag-mcqs-adda","23":"tag-mcqs-for-chemistry-exam","24":"tag-metal-extraction","25":"tag-metal-reactivity","26":"tag-metallurgy","27":"tag-metals-in-chemistry","28":"tag-metals-vs-non-metals","29":"tag-non-metals-in-chemistry","30":"tag-oxidation-and-reduction","31":"tag-physical-properties-of-metals","32":"tag-physical-properties-of-non-metals","33":"tag-psc-chemistry-mcqs","34":"tag-reactivity-series","35":"tag-ssc-chemistry-mcqs","36":"tag-upsc-chemistry-mcqs"},"_links":{"self":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12822","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/comments?post=12822"}],"version-history":[{"count":2,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12822\/revisions"}],"predecessor-version":[{"id":12908,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12822\/revisions\/12908"}],"wp:attachment":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/media?parent=12822"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/categories?post=12822"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/tags?post=12822"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}