Sample Quizzes For Preparation: Properties of Metals
Q1.
Which of the following is a correct physical property of metals?
A) Poor conductor of heat
B) Brittle in solid state
C) Ductile and malleable
D) Low melting point
Q2.
Why do metals conduct electricity?
A) They contain positive ions
B) They have free-moving protons
C) They have delocalised electrons
D) They contain covalent bonds
Q3.
Which property allows a metal to be stretched into a wire?
A) Malleability
B) Ductility
C) Thermal conductivity
D) Density
Q4.
Which of the following is a general physical property of non-metals?
A) High thermal conductivity
B) Shiny appearance
C) Brittle
D) Ductile
Q5.
Which metal will react with cold water?
A) Copper
B) Iron
C) Sodium
D) Lead
Q6.
What is the general reaction of a metal with dilute hydrochloric acid?
A) Metal + HCl → Water + Salt
B) Metal + HCl → Hydrogen + Salt
C) Metal + HCl → Metal oxide + Water
D) Metal + HCl → Metal hydroxide
Q7.
What is observed when magnesium reacts with dilute hydrochloric acid?
A) Formation of a blue precipitate
B) Effervescence and temperature rise
C) Colour change from green to orange
D) No visible reaction
Q8.
Which metal reacts with steam but not cold water?
A) Potassium
B) Magnesium
C) Calcium
D) Sodium
Q9.
Which of the following is a chemical property of metals?
A) High melting point
B) Reaction with acids to form hydrogen
C) Conductivity of heat
D) Shiny surface
Q10.
What type of oxide is usually formed when a metal reacts with oxygen?
A) Acidic oxide
B) Neutral oxide
C) Amphoteric oxide
D) Basic oxide
Q11.
Which non-metal is a good conductor of electricity?
A) Sulphur
B) Graphite
C) Chlorine
D) Phosphorus
Q12.
Which of the following is an example of a metal that does NOT react with dilute acids?
A) Zinc
B) Iron
C) Magnesium
D) Copper
Q13.
What happens when sodium is added to cold water?
A) It sinks and dissolves slowly
B) It forms a green gas
C) It floats, fizzes, and may catch fire
D) No visible reaction
Q14.
Which property best explains the use of copper in electrical wiring?
A) High density
B) Shiny appearance
C) High melting point
D) Excellent electrical conductivity
Q15.
Why do metals generally have high melting points?
A) They are non-volatile
B) They have strong covalent bonds
C) They have weak Van der Waals forces
D) They have strong metallic bonds
Q16.
Which metal reacts with steam to produce hydrogen gas and a metal oxide?
A) Copper
B) Magnesium
C) Gold
D) Silver
Q17.
What is the name of the gas evolved when a reactive metal reacts with an acid?
A) Oxygen
B) Carbon dioxide
C) Hydrogen
D) Nitrogen
Q18.
Which of the following describes the malleability of metals?
A) The ability to form compounds
B) The ability to dissolve in water
C) The ability to be hammered into sheets
D) The ability to conduct electricity
Q19.
What kind of bonding exists in metals that allows electrical conductivity?
A) Ionic bonding
B) Covalent bonding
C) Metallic bonding
D) Hydrogen bonding
Q20.
Which metal reacts the least with oxygen under normal conditions?
A) Potassium
B) Magnesium
C) Iron
D) Gold
Q21.
Which property allows metals to be used in cooking utensils?
A) Poor conductivity
B) High reactivity
C) Low melting point
D) High thermal conductivity
Q22.
Which of the following is NOT a typical characteristic of metals?
A) Good conductor
B) Ductile
C) Soft and crumbly
D) High melting point
Q23.
Which gas is released when iron reacts with dilute sulphuric acid?
A) Hydrogen
B) Carbon dioxide
C) Oxygen
D) Nitrogen
Q24.
Which metal would react vigorously with cold water?
A) Iron
B) Aluminium
C) Potassium
D) Lead
Q25.
How does magnesium typically react with steam?
A) It dissolves slowly
B) It forms magnesium chloride
C) It forms magnesium oxide and hydrogen
D) It doesn’t react at all
Q26.
Which type of oxide does magnesium form when heated in air?
A) Acidic
B) Basic
C) Amphoteric
D) Neutral
Q27.
Which physical property of metals helps in making aircraft bodies?
A) High density
B) Brittle structure
C) Low tensile strength
D) Light weight and strength
Q28.
Which of these reactions forms a salt and hydrogen gas?
A) Metal + Water
B) Metal + Oxygen
C) Metal + Dilute acid
D) Metal + Alkali
Q29.
What is the appearance of most metals in pure form?
A) Dull and rough
B) Shiny and lustrous
C) Transparent and soft
D) Powdery and colourful
Q30.
Which of the following statements about graphite is correct?
A) It is a metal with high conductivity
B) It is a non-metal and a good conductor
C) It is a brittle metallic compound
D) It is a poor conductor due to strong ionic bonds
Answer Key with Explanations
Q1. C) Ductile and malleable
✅ Correct: Metals are ductile and malleable.
❌ Others: A (wrong, metals conduct heat), B (non-metals are brittle), D (metals usually have high melting points).
Q2. C) They have delocalised electrons
✅ Correct: Delocalised electrons allow free movement of charge.
❌ Others: A (ions don’t conduct), B (protons don’t move), D (covalent bonds do not allow conduction).
Q3. B) Ductility
✅ Correct: Ductility is the ability to be drawn into wires.
❌ Others: A (sheets not wires), C (thermal property), D (not related).
Q4. C) Brittle
✅ Correct: Non-metals are brittle when solid.
❌ Others: A, B, D – all describe metals.
Q5. C) Sodium
✅ Correct: Sodium reacts vigorously with cold water.
❌ Others: A, B, D – too unreactive in cold water.
Q6. B) Metal + HCl → Hydrogen + Salt
✅ Correct: This is the correct general reaction.
❌ Others: Incorrect products/formulae.
Q7. B) Effervescence and temperature rise
✅ Correct: Magnesium reacts with HCl releasing hydrogen.
❌ Others: Do not match the actual reaction.
Q8. B) Magnesium
✅ Correct: Magnesium reacts with steam but not cold water.
❌ Others: A, C, D – too reactive or too unreactive.
Q9. B) Reaction with acids to form hydrogen
✅ Correct: Key chemical property of metals.
❌ Others: Physical properties.
Q10. D) Basic oxide
✅ Correct: Metal oxides are generally basic.
❌ Others: Acidic and amphoteric are typically non-metal characteristics.
Q11. B) Graphite
✅ Correct: Graphite is a non-metal that conducts electricity.
❌ Others: Non-conductors.
Q12. D) Copper
✅ Correct: Copper doesn’t react with dilute acids.
❌ Others: Reactivity is higher.
Q13. C) It floats, fizzes, and may catch fire
✅ Correct: Sodium reacts vigorously with water.
❌ Others: Incorrect observations.
Q14. D) Excellent electrical conductivity
✅ Correct: Reason copper is used in wiring.
❌ Others: Less relevant to wiring use.
Q15. D) They have strong metallic bonds
✅ Correct: Requires high energy to break.
❌ Others: Misunderstand bonding types.
Q16. B) Magnesium
✅ Correct: Reacts with steam to form MgO + H₂.
❌ Others: Unreactive or don’t match steam reaction.
Q17. C) Hydrogen
✅ Correct: Released in metal + acid reactions.
❌ Others: Incorrect products.
Q18. C) The ability to be hammered into sheets
✅ Correct: This is malleability.
❌ Others: Irrelevant properties.
Q19. C) Metallic bonding
✅ Correct: Explains conductivity and malleability.
❌ Others: Other types of bonds don’t apply to metals.
Q20. D) Gold
✅ Correct: Gold is the least reactive with oxygen.
❌ Others: React more readily.
Q21. D) High thermal conductivity
✅ Correct: Enables efficient heat transfer in cooking.
❌ Others: Not relevant to cooking use.
Q22. C) Soft and crumbly
✅ Correct: Not a typical metal trait.
❌ Others: Describe metals.
Q23. A) Hydrogen
✅ Correct: Iron + acid → hydrogen gas
❌ Others: Incorrect gas for the reaction.
Q24. C) Potassium
✅ Correct: Very reactive with water.
❌ Others: Less reactive or inert.
Q25. C) It forms magnesium oxide and hydrogen
✅ Correct: Standard reaction with steam.
❌ Others: Incorrect products.
Q26. B) Basic
✅ Correct: Magnesium forms MgO, a basic oxide.
❌ Others: Non-metal oxide types.
Q27. D) Light weight and strength
✅ Correct: Helps with fuel efficiency and structure.
❌ Others: Incorrect for aircraft applications.
Q28. C) Metal + Dilute acid
✅ Correct: Classic salt + hydrogen reaction.
❌ Others: Do not yield both salt and hydrogen.
Q29. B) Shiny and lustrous
✅ Correct: Common metal characteristic.
❌ Others: Not true of pure metals.
Q30. B) It is a non-metal and a good conductor
✅ Correct: Graphite is unique among non-metals.
❌ Others: Misclassify graphite or describe wrong bonding.