Title 3 Metals and Non-metals - MCQs.pdf ✅

© www.bankofbiology.com 8921 510 476 1 3. METALS AND NON-METALS – MCQs PHYSICAL PROPERTIES 1. The shining property of metals after cleaning their surfaces by rubbing with sandpaper is called: a) Hardness b) Malleability c) Metallic lustre d) Ductility Answer: c) Metallic lustre 2. Which metal is soft and can be cut with a knife? a) Iron b) Aluminium c) Sodium d) Copper Answer: c) Sodium 3. The ability of metals to be beaten into thin sheets is known as: a) Hardness b) Malleability c) Ductility d) Sonority Answer: b) Malleability 4. Which metals are the most malleable? a) Iron and Copper b) Aluminium and Magnesium c) Gold and Silver d) Lead and Mercury Answer: c) Gold and Silver 5. The ability of metals to be drawn into thin wires is known as: a) Hardness b) Malleability c) Ductility d) Sonority Answer: c) Ductility 6. Which metal is the most ductile, capable of being drawn into a wire of about 2 km length from 1 gram? a) Copper b) Aluminium c) Gold d) Silver Answer: c) Gold 7. Which metals are the best conductors of heat? a) Aluminium and Magnesium b) Iron and Copper c) Silver and Copper d) Lead and Mercury Answer: c) Silver and Copper 8. Which metals are poor conductors of heat? a) Iron and Copper b) Lead and Mercury c) Silver and Gold d) Aluminium and Magnesium Answer: b) Lead and Mercury 9. The material is used to coat wires carrying current to prevent electric shock is a) Copper b) Lead c) PVC d) Graphite Answer: c) PVC (polyvinyl chloride) 10. The ability of metals to produce sound on striking a hard surface is known as: a) Hardness b) Malleability c) Ductility d) Sonority Answer: d) Sonority 11. Which of the following is a liquid non-metal? a) Iodine b) Bromine c) Sulphur d) Carbon Answer: b) Bromine 12. Which non-metal is lustrous? a) Sulphur b) Iodine c) Carbon d) Hydrogen Answer: b) Iodine 13. Which non-metal is a good conductor of electricity? a) Sulphur b) Iodine c) Graphite d) Hydrogen Answer: c) Graphite 14. Graphite is a form of a) Sulphur b) Iodine c) Carbon d) Copper Answer: c) Carbon 15. Which metal is in a liquid state at room temperature? a) Sodium b) Mercury c) Iron d) Aluminium Answer: b) Mercury 16. Which metals have very low melting points and can melt if kept on the palm? a) Gold & Silver b) Gallium & Caesium c) Iron & Copper d) Silver & Mercury Answer: b) Gallium and Caesium 17. Which form of carbon is the hardest natural substance and has a very high melting and boiling point? a) Graphite b) Diamond c) Coal d) Charcoal Answer: b) Diamond 18. Which metals are so soft they can be cut with a knife and have low densities and low melting points? a) Iron and Copper b) Sodium, Potassium, and Lithium c) Aluminium and Magnesium d) Gold and Silver Answer: b) Sodium, Potassium, and Lithium
© www.bankofbiology.com 8921 510 476 2 CHEMICAL PROPERTIES OF METALS 19. When magnesium ribbon is burned, it forms a) Magnesium chloride b) Magnesium hydroxide c) Magnesium oxide d) Magnesium sulphate Answer: c) Magnesium oxide 20. What colour does red litmus paper turn when tested with magnesium hydroxide? a) Red b) Blue c) Green d) Yellow Answer: b) Blue 21. What is formed when sulphur powder is burned and the fumes are dissolved in water? a) Sulphuric acid b) Sulphurous acid c) Sulphur dioxide d) Sulphur trioxide Answer: b) Sulphurous acid 22. What colour does blue litmus paper turn when tested with sulphurous acid? a) Red b) Blue c) Green d) Yellow Answer: a) Red 23. Most non-metals when dissolved in water produce a) Basic oxides b) Neutral oxides c) Acidic oxides d) Salts Answer: c) Acidic oxides 24. Most metals when dissolved in water produce a) Basic oxides b) Neutral oxides c) Acidic oxides d) Salts Answer: a) Basic oxides 25. Which metal burns with a yellow flame? a) Magnesium b) Copper c) Aluminium d) Sodium Answer: d) Sodium 26. Which metal burns with a blue-green flame? a) Magnesium b) Copper c) Aluminium d) Sodium Answer: b) Copper 27. What is the reactivity order of metals to oxygen from highest to lowest? a) Na > Al > Mg > Zn > Fe > Pb > Cu b) Na > Mg > Al > Zn > Fe > Pb > Cu c) Mg > Na > Al > Zn > Fe > Pb > Cu d) Na > Mg > Al > Fe > Zn > Pb > Cu Answer: b) Na > Mg > Al > Zn > Fe > Pb > Cu 28. Which metal oxide is soluble in water? a) Copper oxide b) Aluminium oxide c) Sodium oxide d) Iron oxide Answer: c) Sodium oxide 29. What is formed when copper is heated in air? a) Copper(II) chloride b) Copper(II) oxide c) Copper(II) sulphate d) Copper(II) nitrate Answer: b) Copper(II) oxide 30. The type of oxide that shows both acidic and basic behaviour is a) Neutral oxide b) Amphoteric oxide c) Acidic oxide d) Basic oxide Answer: b) Amphoteric oxide 31. Which oxide is amphoteric? a) Sodium oxide b) Aluminium oxide c) Copper oxide d) Iron oxide Answer: b) Aluminium oxide 32. Which is the reaction of sodium oxide with water? a) Na2O + H2O → 2NaOH b) Na2O + H2O → NaOH + H2 c) Na2O + H2O → Na2CO3 d) Na2O + H2O → Na2SO4 Answer: a) Na2O + H2O → 2NaOH 33. Potassium and sodium kept in kerosene oil because a) They react slowly with oxygen b) They melt in room temperature c) They react vigorously with oxygen and can catch fire d) They are insoluble in kerosene oil Answer: c) They react vigorously with oxygen and can catch fire 34. What is formed on the surface of metals like Mg, Al, Zn, Pb at ordinary temperature? a) Thick protective layer of oxide b) Thin protective layer of oxide c) Thin layer of carbonate d) Thick layer of hydroxide Answer: b) Thin protective layer of oxide 35. Which metals do not react with oxygen even at high temperature? a) Iron and copper b) Aluminium and zinc c) Silver and gold d) Sodium and potassium Answer: c) Silver and gold 36. Anodizing is a process of a) Forming a thick oxide layer on copper b) Removing oxide layers from aluminium c) Removing oxide layers from copper d) Forming a thick oxide layer on aluminium Answer: d) Forming a thick oxide layer on aluminium 37. What do metals form when they react with water? a) Metal oxide and hydrogen gas b) Metal hydroxide and hydrogen gas c) Metal carbonate and oxygen gas d) Metal chloride and oxygen gas Answer: a) Metal oxide and hydrogen gas
© www.bankofbiology.com 8921 510 476 3 38. Which metals react violently with cold water? a) Potassium and sodium b) Aluminium and iron c) Magnesium and zinc d) Copper and silver Answer: a) Potassium and sodium 39. What is the reaction of potassium with cold water? a) K + H2O → KOH + H2 + heat energy b) K + H2O → KO2 + H2 + heat energy c) 2K + H2O → 2KOH + H2 + heat energy d) 2K + 2H2O → 2KOH + H2 + heat energy Answer: d) 2K + 2H2O → 2KOH + H2 + heat energy 40. Which metal reacts less violently with water, causing hydrogen gas to form but not ignite? a) Sodium b) Magnesium c) Calcium d) Potassium Answer: c) Calcium 41. The reaction of calcium with water is a) Ca + H2O → CaOH + H2 b) Ca + 2H2O → Ca(OH)2 + H2 c) Ca + H2O → CaO + H2 d) Ca + 2H2O → Ca(OH)2 + H2O Answer: b) Ca + 2H2O → Ca(OH)2 + H2 42. Which metal reacts with hot water but not with cold water? a) Magnesium b) Aluminium c) Iron d) Copper Answer: a) Magnesium 43. Which metals react with steam rather than with cold or hot water? a) Sodium and potassium b) Magnesium and calcium c) Aluminium, iron, and zinc d) Copper, silver, and gold Answer: c) Aluminium, iron, and zinc 44. What is the reactivity order of metals with water from highest to lowest? a) Na > K > Ca > Mg > Al > Fe b) K > Na > Ca > Mg > Al > Fe c) Na > K > Mg > Ca > Al > Fe d) Na > K > Ca > Al > Mg > Fe Answer: a) Na > K > Ca > Mg > Al > Fe 45. What do metals form when they react with dilute acids? a) Metal oxides and hydrogen gas b) Metal hydroxides and oxygen gas c) Salt and hydrogen gas d) Metal chloride and hydrogen gas Answer: c) Salt and hydrogen gas 46. Which metal shows the fastest reaction with dilute hydrochloric acid? a) Aluminium b) Iron c) Magnesium d) Zinc Answer: c) Magnesium 47. The reaction of magnesium with hydrochloric acid is a) Mg + HCl → MgCl + H2 b) Mg + 2HCl → MgCl2 + H2 c) Mg + HCl → MgCl2 + H2O d) Mg + 2HCl → MgCl + H2 Answer: b) Mg + 2HCl → MgCl2 + H2 48. Why does copper not react with dilute hydrochloric acid? a) Copper is less reactive than hydrogen b) Copper is more reactive than hydrogen c) Copper forms a protective oxide layer d) Copper does not form salts Answer: a) Copper is less reactive than hydrogen 49. Which acid does not produce hydrogen gas when reacting with metals, except magnesium and manganese? a) Hydrochloric acid b) Sulphuric acid c) Nitric acid d) Acetic acid Answer: c) Nitric acid 50. What happens when nitric acid reacts with most metals? a) Hydrogen gas is evolved b) Nitric acid is reduced to nitrogen oxides c) The metal dissolves forming metal nitrate d) The metal forms a passive layer Answer: b) Nitric acid is reduced to nitrogen oxides 51. Aqua regia is a mixture of a) Concentrated HCl and HNO3 in 3:1 ratio b) Dilute HCl and HNO3 in 1:3 ratio c) Dilute HCl and HNO3 in 3:1 ratio d) Concentrated HCl and HNO3 in 1:3 ratio Answer: a) Concentrated HCl and HNO3 in 3:1 ratio 52. The main use of Aqua regia is a) To dissolve metals like iron and zinc b) To dissolve gold and platinum c) To clean glassware in laboratories d) To neutralize strong acids Answer: b) To dissolve gold and platinum 53. What happens when a clean copper wire is placed in iron sulphate solution? a) Copper displaces iron from iron sulphate b) Iron displaces copper from copper sulphate c) Copper reacts with iron sulphate to form copper sulphate d) No reaction occurs Answer: d) No reaction occurs
© www.bankofbiology.com 8921 510 476 4 54. What happens when an iron nail is placed in copper sulphate solution? a) Iron displaces copper from copper sulphate b) Copper displaces iron from iron sulphate c) Iron reacts with copper sulphate to form iron sulphate d) No reaction occurs Answer: a) Iron displaces copper from copper sulphate 55. What type of reaction occurs when a more reactive metal displaces a less reactive metal from its compound? a) Synthesis reaction b) Decomposition reaction c) Displacement reaction d) Combustion reaction Answer: c) Displacement reaction 56. Which of the following metals can displace zinc from zinc sulphate solution? a) Copper b) Iron c) Aluminium d) Gold Answer: c) Aluminium 57. Which metals do not react with water at all? a) Sodium and potassium b) Magnesium and calcium c) Aluminium, iron, and zinc d) Lead, copper, silver, and gold Answer: d) Lead, copper, silver, and gold 58. What is formed when zinc reacts with dilute hydrochloric acid? a) Zinc oxide and hydrogen gas b) Zinc chloride and oxygen gas c) Zinc chloride and hydrogen gas d) Zinc hydroxide and hydrogen gas Answer: c) Zinc chloride and hydrogen gas 59. Which metal shows both acidic and basic behaviour (amphoteric)? a) Sodium oxide b) Aluminium oxide c) Copper oxide d) Iron oxide Answer: b) Aluminium oxide 60. Which metal reacts with hot water to form metal hydroxide and hydrogen gas? a) Copper b) Iron c) Magnesium d) Zinc Answer: c) Magnesium 61. Which metal is least reactive with water among the following? a) Sodium b) Calcium c) Aluminium d) Iron Answer: d) Iron 62. Which metal does not react with dilute hydrochloric acid? a) Aluminium b) Copper c) Zinc d) Iron Answer: b) Copper 63. What is formed when aluminium reacts with steam? a) Aluminium hydroxide and hydrogen gas b) Aluminium oxide and hydrogen gas c) Aluminium chloride and hydrogen gas d) Aluminium nitrate and hydrogen gas Answer: b) Aluminium oxide and hydrogen gas 64. What is the reaction of iron with steam? a) Fe + H2O → FeO + H2 b) 3Fe + 4H2O → Fe3O4 + 4H2 c) 2Fe + 3H2O → Fe2O3+ 3H2 d) Fe + H2O → Fe(OH)2 + H2 Answer: b) 3Fe + 4H2O → Fe3O4 + 4H2 65. What is formed when zinc reacts with steam? a) Zinc hydroxide and hydrogen gas b) Zinc oxide and hydrogen gas c) Zinc chloride and hydrogen gas d) Zinc carbonate and hydrogen gas Answer: b) Zinc oxide and hydrogen gas 66. Which metal can displace copper from copper sulphate solution? a) Aluminium b) Iron c) Silver d) Gold Answer: b) Iron 67. What type of reaction is observed when a metal displaces another metal from its solution? a) Combination reaction b) Decomposition reaction c) Displacement reaction d) Double displacement reaction Answer: c) Displacement reaction 68. Which metals do not react with oxygen even at high temperature? a) Lead and iron b) Copper and zinc c) Silver and gold d) Aluminium and magnesium Answer: c) Silver and gold 69. Which metals react with very dilute nitric acid to evolve hydrogen gas? a) Copper and silver b) Magnesium and manganese c) Aluminium and zinc d) Iron and lead Answer: b) Magnesium and manganese 70. What is formed when copper is placed in iron sulphate solution?