1. Metals are generally:
A) Good conductors of heat and electricity
B) Bad conductors of electricity
C) Non-malleable
D) Brittle
Answer: A
Explanation: Metals conduct heat and electricity due to free electrons.
2. Non-metals are generally:
A) Malleable and ductile
B) Lustrous
C) Brittle and poor conductors
D) Good conductors
Answer: C
Explanation: Non-metals are brittle and poor conductors.
3. Which of the following is a liquid metal at room temperature?
A) Na
B) Hg
C) Ga
D) Pb
Answer: B
Explanation: Mercury (Hg) is the only liquid metal at room temp.
4. Which non-metal is liquid at room temperature?
A) Oxygen
B) Bromine
C) Chlorine
D) Nitrogen
Answer: B
Explanation: Bromine (Br₂) is a liquid non-metal at room temp.
5. Which metal is the lightest?
A) Sodium
B) Potassium
C) Lithium
D) Calcium
Answer: C
Explanation: Lithium is the lightest metal.
6. Which is the heaviest non-metal element?
A) Iodine
B) Bromine
C) Astatine
D) Sulphur
Answer: C
Explanation: Astatine is the heaviest halogen (non-metal).
7. Which metal is known as ‘liquid silver’?
A) Lead
B) Mercury
C) Platinum
D) Nickel
Answer: B
Explanation: Mercury is shiny and liquid → called liquid silver.
8. Which metal is the best conductor of electricity?
A) Copper
B) Aluminium
C) Silver
D) Gold
Answer: C
Explanation: Silver is the best conductor, though copper is used widely due to cost.
9. Which non-metal is a good conductor of electricity?
A) Sulphur
B) Graphite
C) Phosphorus
D) Nitrogen
Answer: B
Explanation: Graphite (form of carbon) conducts electricity.
10. Metals are generally:
A) Acidic oxides formers
B) Basic oxides formers
C) Neutral oxides formers
D) Amphoteric always
Answer: B
Explanation: Metal oxides are generally basic (e.g., Na₂O, CaO).
11. Non-metal oxides are usually:
A) Basic
B) Acidic
C) Neutral
D) Salts
Answer: B
Explanation: Non-metal oxides like SO₂, CO₂ are acidic.
12. Amphoteric oxides are those which:
A) Are neutral
B) Show both acidic and basic properties
C) Are only acidic
D) Are only basic
Answer: B
Explanation: Amphoteric oxides (Al₂O₃, ZnO) react with both acids and bases.
13. Which of the following is an amphoteric oxide?
A) Na₂O
B) SO₂
C) Al₂O₃
D) CO₂
Answer: C
Explanation: Al₂O₃ is amphoteric.
14. The property of being hammered into sheets is called:
A) Ductility
B) Brittleness
C) Malleability
D) Conductivity
Answer: C
Explanation: Metals are malleable → hammered into sheets.
15. The property of being drawn into wires is called:
A) Ductility
B) Malleability
C) Brittleness
D) Rigidity
Answer: A
Explanation: Metals are ductile → can be drawn into wires.
16. Which non-metal shows allotropy in diamond and graphite forms?
A) Sulphur
B) Phosphorus
C) Carbon
D) Oxygen
Answer: C
Explanation: Carbon has diamond, graphite, fullerene allotropes.
17. Which metal is used for making lightweight aircraft bodies?
A) Fe
B) Al
C) Cu
D) Ag
Answer: B
Explanation: Aluminium is light, strong, corrosion resistant.
18. Which non-metal is essential for respiration?
A) Nitrogen
B) Hydrogen
C) Oxygen
D) Carbon
Answer: C
Explanation: Oxygen is inhaled for respiration.
19. Which non-metal is used in making matchsticks?
A) Phosphorus
B) Sulphur
C) Carbon
D) Nitrogen
Answer: A
Explanation: Red phosphorus is used in matchsticks.
20. Which metal is used in making thermometers?
A) Hg
B) Pb
C) Zn
D) Sn
Answer: A
Explanation: Mercury is used in thermometers.
21. Which non-metal is used in vulcanization of rubber?
A) Nitrogen
B) Oxygen
C) Sulphur
D) Chlorine
Answer: C
Explanation: Sulphur makes rubber stronger by vulcanization.
22. Which metal is used for making electrical wires?
A) Ag
B) Cu
C) Al
D) Both B and C
Answer: D
Explanation: Copper and aluminium are commonly used in electrical wires.
23. Which metal is liquid at slightly above room temperature (30 °C)?
A) Mercury
B) Gallium
C) Sodium
D) Potassium
Answer: B
Explanation: Gallium melts at 29.8 °C.
24. Which non-metal is used in making antiseptics like tincture iodine?
A) Chlorine
B) Bromine
C) Iodine
D) Sulphur
Answer: C
Explanation: Iodine is used as an antiseptic.
25. Which non-metal is essential for fertilizers?
A) Oxygen
B) Hydrogen
C) Nitrogen
D) Carbon
Answer: C
Explanation: Nitrogen compounds (urea, ammonium salts) are fertilizers.
26. Metals react with oxygen to form:
A) Acidic oxides
B) Basic oxides
C) Neutral oxides
D) None
Answer: B
Explanation: Metal oxides are generally basic in nature (e.g., Na₂O, CaO).
27. Non-metals react with oxygen to form:
A) Basic oxides
B) Amphoteric oxides
C) Acidic oxides
D) Salts
Answer: C
Explanation: Non-metal oxides like CO₂, SO₂, P₂O₅ are acidic.
28. Which metal does not react with oxygen even at high temperature?
A) Gold
B) Copper
C) Magnesium
D) Zinc
Answer: A
Explanation: Noble metals like gold and platinum resist oxidation.
29. Which metal burns with dazzling white flame in air?
A) Copper
B) Magnesium
C) Aluminium
D) Sodium
Answer: B
Explanation: Magnesium burns with a bright white flame in oxygen.
30. Non-metals generally react with oxygen to form:
A) Neutral oxides
B) Acidic oxides
C) Basic salts
D) Alloys
Answer: B
Explanation: CO₂, SO₂ are acidic oxides.
31. Sodium reacts vigorously with water to form:
A) NaOH and H₂
B) Na₂O and H₂
C) Na₂CO₃ and O₂
D) NaHCO₃ and CO₂
Answer: A
Explanation: 2Na + 2H₂O → 2NaOH + H₂.
32. Which alkaline earth metal reacts less vigorously with water?
A) Sodium
B) Magnesium
C) Calcium
D) Potassium
Answer: B
Explanation: Magnesium reacts slowly with cold water but faster with hot water.
33. Which metal reacts explosively with water?
A) Magnesium
B) Potassium
C) Zinc
D) Aluminium
Answer: B
Explanation: Potassium reacts violently with water, producing hydrogen and heat.
34. Which metal is stored under kerosene to prevent reaction with air/water?
A) Aluminium
B) Zinc
C) Sodium
D) Copper
Answer: C
Explanation: Alkali metals (Na, K) are highly reactive → stored in kerosene.
35. Which non-metal reacts with water to form acidic solution?
A) Chlorine
B) Nitrogen
C) Phosphorus
D) Sulphur
Answer: A
Explanation: Cl₂ + H₂O → HCl + HOCl (acidic solution).
36. Metals generally react with acids to form:
A) Salt and hydrogen gas
B) Salt and oxygen
C) Base and CO₂
D) Only salts
Answer: A
Explanation: Metal + Acid → Salt + H₂ (except Cu, Ag, Au).
37. Which gas is liberated when Zn reacts with dilute HCl?
A) CO₂
B) O₂
C) H₂
D) SO₂
Answer: C
Explanation: Zn + 2HCl → ZnCl₂ + H₂.
38. Which metals do not liberate hydrogen with dilute acids?
A) Zn, Fe
B) Cu, Ag
C) Mg, Ca
D) Na, K
Answer: B
Explanation: Cu, Ag, Au are below hydrogen in reactivity series → do not react with dilute acids.
39. Which non-metal reacts with H₂ to form ammonia?
A) Oxygen
B) Nitrogen
C) Sulphur
D) Chlorine
Answer: B
Explanation: N₂ + 3H₂ → 2NH₃ (Haber process).
40. Non-metals generally react with hydrogen to form:
A) Hydrides
B) Salts
C) Metals
D) Bases
Answer: A
Explanation: Example: NH₃, HCl, H₂S.
41. Which metal reacts with both acids and bases to form salts?
A) Copper
B) Aluminium
C) Sodium
D) Zinc
Answer: B
Explanation: Al is amphoteric → reacts with acids and bases.
42. Which of the following is an amphoteric metal?
A) Al
B) Zn
C) Sn
D) All of these
Answer: D
Explanation: Al, Zn, Sn all show amphoteric nature.
43. Amphoteric oxides react with:
A) Only acids
B) Only bases
C) Both acids and bases
D) Neithe
Answer: C
Explanation: Example: Al₂O₃ reacts with HCl and NaOH.
44. Reaction of chlorine gas with cold water gives:
A) HCl only
B) HOCl only
C) HCl + HOCl
D) NaCl
Answer: C
Explanation: Cl₂ + H₂O → HCl + HOCl.
45. Which non-metal reacts with hot concentrated H₂SO₄ to form SO₂?
A) Carbon
B) Phosphorus
C) Sulphur
D) Iodine
Answer: D
Explanation: I₂ + conc. H₂SO₄ → I₂O + SO₂ (redox reaction).
46. Which metal reacts with steam to form hydrogen gas?
A) Gold
B) Copper
C) Iron
D) Silver
Answer: C
Explanation: 3Fe + 4H₂O (steam) → Fe₃O₄ + 4H₂.
47. Which metal reacts with bases to form complex salts?
A) Zn
B) Cu
C) Ag
D) Na
Answer: A
Explanation: Zn + 2NaOH → Na₂ZnO₂ + H₂ (sodium zincate).
48. Reaction of non-metals with alkali forms:
A) Basic salts
B) Complex salts
C) Oxyanions
D) Nothing
Answer: C
Explanation: Example: Cl₂ + NaOH → NaCl + NaClO (oxyanions).
49. Which non-metal reacts with lime water turning it milky?
A) SO₂
B) CO₂
C) NO₂
D) Cl₂
Answer: B
Explanation: CO₂ + Ca(OH)₂ → CaCO₃ (white precipitate).
50. Which of the following metals reacts violently with acids and water?
A) Fe
B) Zn
C) Na
D) Cu
Answer: C
Explanation: Sodium reacts vigorously with acids and water producing H₂.
51. The process of extracting pure metal from its ore is called:
A) Metallurgy
B) Crystallization
C) Sublimation
D) Distillation
Answer: A
Explanation: Metallurgy involves extraction and purification of metals from ores.
52. Aluminium is extracted from which ore?
A) Hematite
B) Bauxite
C) Galena
D) Chalcopyrite
Answer: B
Explanation: The chief ore of aluminium is bauxite (Al₂O₃·2H₂O).
53. The chief ore of iron is:
A) Bauxite
B) Hematite
C) Galena
D) Zinc blende
Answer: B
Explanation: Hematite (Fe₂O₃) is the main ore of iron.
54. Galena is an ore of:
A) Zinc
B) Lead
C) Copper
D) Aluminium
Answer: B
Explanation: Galena (PbS) is the chief ore of lead.
55. Zinc is extracted from:
A) Galena
B) Zinc blende
C) Bauxite
D) Malachite
Answer: B
Explanation: Zinc blende (ZnS) is the ore of zinc.
56. The purest form of iron is:
A) Pig iron
B) Wrought iron
C) Steel
D) Cast iron
Answer: B
Explanation: Wrought iron is the purest form (~99.9% Fe).
57. Stainless steel is an alloy of:
A) Fe + C + Cr + Ni
B) Fe + C + Mn
C) Fe + Cu + Ni
D) Fe + Zn
Answer: A
Explanation: Stainless steel contains iron, carbon, chromium, and nickel.
58. Bronze is an alloy of:
A) Cu + Zn
B) Cu + Sn
C) Cu + Al
D) Cu + Ni
Answer: B
Explanation: Bronze is made of copper and tin.
59. Brass is an alloy of:
A) Cu + Zn
B) Cu + Sn
C) Cu + Ni
D) Cu + Pb
Answer: A
Explanation: Brass = Copper + Zinc.
60. Duralumin is an alloy of:
A) Al + Cu + Mg + Mn
B) Al + Zn + Fe
C) Al + Ni + Cr
D) Al + Pb + Sn
Answer: A
Explanation: Duralumin is a strong, lightweight alloy used in aircraft.
61. Which metal is used in galvanization?
A) Fe
B) Zn
C) Cu
D) Sn
Answer: B
Explanation: Galvanization is coating iron with zinc.
62. Which metal is used for electroplating food containers to prevent rusting?
A) Sn
B) Cu
C) Zn
D) Al
Answer: A
Explanation: Tin coating prevents corrosion and is safe for food storage.
63. Which metal is used in making electrical cables and cooking utensils?
A) Ag
B) Cu
C) Al
D) Both B and C
Answer: D
Explanation: Copper and aluminium are widely used in utensils and wires.
64. Which metal is used in making filaments of electric bulbs?
A) Cu
B) Fe
C) W
D) Al
Answer: C
Explanation: Tungsten (W) has high melting point → used in bulbs.
65. Which non-metal is used in vulcanization of rubber?
A) Oxygen
B) Sulphur
C) Nitrogen
D) Phosphorus
Answer: B
Explanation: Sulphur cross-links rubber molecules, improving strength.
66. Which non-metal is used in making safety matches?
A) Carbon
B) Sulphur
C) Phosphorus
D) Iodine
Answer: C
Explanation: Red phosphorus is used in matchstick heads.
67. Which non-metal is used as an antiseptic?
A) Chlorine
B) Bromine
C) Iodine
D) Nitrogen
Answer: C
Explanation: Iodine solution (tincture iodine) is an antiseptic.
68. Which metal is used in making thermometers and barometers?
A) Al
B) Cu
C) Hg
D) Pb
Answer: C
Explanation: Mercury (Hg) is liquid and expands uniformly with temperature.
69. Which non-metal is used in disinfecting drinking water?
A) Nitrogen
B) Oxygen
C) Chlorine
D) Iodine
Answer: C
Explanation: Chlorine kills germs in water.
70. Which metal is used in amalgam fillings for teeth?
A) Ag
B) Au
C) Hg
D) Zn
Answer: C
Explanation: Mercury forms amalgams with other metals for dental fillings.
71. Which non-metal is a constituent of proteins?
A) Phosphorus
B) Sulphur
C) Oxygen
D) Iodine
Answer: B
Explanation: Sulphur is present in amino acids like cysteine and methionine.
72. The main component of bleaching powder is:
A) CaSO₄
B) Ca(OCl)₂
C) CaCl₂
D) CaCO₃
Answer: B
Explanation: Bleaching powder = calcium oxychloride Ca(OCl)₂.
73. Which metal is used in making aircraft bodies?
A) Iron
B) Aluminium
C) Copper
D) Lead
Answer: B
Explanation: Aluminium is light and corrosion-resistant.
74. The main component of baking soda is:
A) NaCl
B) Na₂CO₃
C) NaHCO₃
D) NaOH
Answer: C
Explanation: Baking soda = Sodium bicarbonate NaHCO₃.
75. Which metal is used in making photo films (traditional)?
A) Ag
B) Cu
C) Zn
D) Pb
Answer: A
Explanation: Silver salts (AgBr, AgCl) are light-sensitive and used in films.
76. The green coating on copper articles is due to:
A) CuO
B) CuCO₃·Cu(OH)₂
C) CuSO₄
D) CuCl₂
Answer: B
Explanation: Copper reacts with CO₂ and H₂O → basic copper carbonate, giving a green layer.
77. Rusting of iron is:
A) Only oxidation
B) Only reduction
C) Both oxidation and reduction
D) A physical change
Answer: C
Explanation: Rusting is a redox reaction: Fe oxidizes, O₂ reduced.
78. Which metal does not corrode in air?
A) Cu
B) Ag
C) Au
D) Fe
Answer: C
Explanation: Noble metals like gold and platinum resist corrosion.
79. Which non-metal prevents food spoilage by acting as an antioxidant?
A) Sulphur
B) Nitrogen
C) Phosphorus
D) Oxygen
Answer: B
Explanation: Nitrogen is inert and used in food packaging to prevent oxidation.
80. Which metal is obtained from the electrolytic refining process?
A) Copper
B) Iron
C) Sodium
D) Zinc
Answer: A
Explanation: Copper is purified by electrolytic refining.
81. Which gas is produced when carbon reacts with concentrated sulphuric acid?
A) CO₂
B) CO
C) SO₂
D) H₂S
Answer: C
Explanation: C + 2H₂SO₄ → CO₂ + 2SO₂ + 2H₂O.
82. Which metal is used in nuclear reactors as a moderator?
A) Lead
B) Cadmium
C) Beryllium
D) Aluminium
Answer: C
Explanation: Beryllium (and also graphite) is used as moderator.
83. Which metal is used for making thin foils for packaging?
A) Copper
B) Aluminium
C) Iron
D) Nickel
Answer: B
Explanation: Aluminium is malleable and used for foils.
84. Which non-metal exists in rhombic and monoclinic forms?
A) Oxygen
B) Carbon
C) Sulphur
D) Phosphorus
Answer: C
Explanation: Sulphur shows allotropy: rhombic and monoclinic.
85. Which allotrope of carbon is the hardest natural substance?
A) Graphite
B) Diamond
C) Fullerene
D) Charcoal
Answer: B
Explanation: Diamond is the hardest natural material.
86. Which form of carbon is used as a lubricant?
A) Diamond
B) Graphite
C) Charcoal
D) Fullerene
Answer: B
Explanation: Graphite layers slide easily → used as lubricant.
87. Which non-metal is essential for thyroid function in humans?
A) Chlorine
B) Iodine
C) Phosphorus
D) Sulphur
Answer: B
Explanation: Iodine is essential for thyroid hormone (thyroxine).
88. Which metal causes “blue baby syndrome” if present in drinking water?
A) Iron
B) Lead
C) Nitrate (from fertilizers)
D) Mercury
Answer: C
Explanation: Excess nitrates in water reduce oxygen transport in infants.
89. Which metal causes lead poisoning?
A) Pb
B) Cu
C) Zn
D) Fe
Answer: A
Explanation: Lead is toxic, causing neurological disorders.
90. Which metal causes Minamata disease?
A) Lead
B) Mercury
C) Cadmium
D) Arsenic
Answer: B
Explanation: Mercury pollution caused Minamata disease in Japan.
91. Which non-metal causes acid rain when released as oxide?
A) Sulphur
B) Nitrogen
C) Both A and B
D) Phosphorus
Answer: C
Explanation: SO₂ and NOx combine with water → acid rain.
92. Which metal is used in cathode ray tubes and television screens?
A) Pb
B) Al
C) Zn
D) Fe
Answer: A
Explanation: Lead shields against harmful radiation.
93. Which gas is produced when carbonates react with acids?
A) H₂
B) O₂
C) CO₂
D) SO₂
Answer: C
Explanation: Example: CaCO₃ + HCl → CaCl₂ + CO₂ + H₂O.
94. Which metal is used for making aircraft and missile bodies due to high strength-to-weight ratio?
A) Titanium
B) Aluminium
C) Iron
D) Copper
Answer: A
Explanation: Titanium alloys are strong, light, and corrosion-resistant.
95. Which non-metal is used in fertilizers as urea?
A) Sulphur
B) Nitrogen
C) Oxygen
D) Phosphorus
Answer: B
Explanation: Urea (NH₂CONH₂) supplies nitrogen to plants.
96. Which non-metal is used in red signal flares?
A) Phosphorus
B) Sulphur
C) Strontium compounds
D) Iodine
Answer: C
Explanation: Strontium salts impart red color to flares.
97. Which is the most abundant metal in Earth’s crust?
A) Iron
B) Aluminium
C) Calcium
D) Sodium
Answer: B
Explanation: Aluminium is the most abundant metal (~8%).
98. Which is the most abundant non-metal in Earth’s crust?
A) Carbon
B) Oxygen
C) Nitrogen
D) Sulphur
Answer: B
Explanation: Oxygen (~47%) is the most abundant non-metal in Earth’s crust.
99. Which non-metal is used in making explosives?
A) Sulphur
B) Nitrogen compounds
C) Phosphorus
D) All of the above
Answer: D
Explanation: Explosives (TNT, gunpowder) contain sulphur, nitrogen, and phosphorus.
100. Which statement is correct about metals and non-metals?
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: B
Explanation: Metals → ductile, malleable, good conductors; Non-metals → brittle, poor conductors.