Materials: Metals and Non-Metals Part 1: MCQs (Q1–Q25)
⚙️ Materials: Metals and Non-Metals – MCQs for Class 8 Science
Part 1: Q1 – Q25
Q1. Which of the following is a metal?
A) Sulphur
B) Carbon
C) Aluminium
D) Phosphorus
✅ Correct Answer: C) Aluminium
Explanation:
- A) Sulphur – Non-metal.
- B) Carbon – Non-metal.
- C) Aluminium – ✔ Shiny, ductile, malleable → a metal.
- D) Phosphorus – Non-metal.
Q2. Which of these is a property of metals?
A) Brittle
B) Malleable
C) Poor conductor
D) Dull
✅ Correct Answer: B) Malleable
Explanation:
- A) Brittle – Property of non-metals.
- B) Malleable – ✔ Metals can be hammered into sheets.
- C) Poor conductor – Non-metal property.
- D) Dull – Non-metal property.
Q3. Which of the following is a non-metal?
A) Sodium
B) Iron
C) Phosphorus
D) Copper
✅ Correct Answer: C) Phosphorus
Explanation:
- A) Sodium – Metal.
- B) Iron – Metal.
- C) Phosphorus – ✔ Non-metal.
- D) Copper – Metal.
Q4. Which of the following is a good conductor of electricity?
A) Sulphur
B) Plastic
C) Iron
D) Wood
✅ Correct Answer: C) Iron
Explanation:
- A) Sulphur – Non-metal, poor conductor.
- B) Plastic – Insulator.
- C) Iron – ✔ Metal, good conductor.
- D) Wood – Insulator.
Q5. The property of being drawn into wires is called:
A) Malleability
B) Ductility
C) Conductivity
D) Brittleness
✅ Correct Answer: B) Ductility
Explanation:
- A) Malleability – Hammered into sheets.
- B) Ductility – ✔ Drawn into wires.
- C) Conductivity – Conducting heat/electricity.
- D) Brittleness – Breaking easily.
Q6. Which metal is liquid at room temperature?
A) Aluminium
B) Mercury
C) Sodium
D) Copper
✅ Correct Answer: B) Mercury
Explanation:
- A) Aluminium – Solid.
- B) Mercury – ✔ Only liquid metal at room temperature.
- C) Sodium – Solid, soft.
- D) Copper – Solid.
Q7. Which non-metal is liquid at room temperature?
A) Iodine
B) Bromine
C) Chlorine
D) Phosphorus
✅ Correct Answer: B) Bromine
Explanation:
- A) Iodine – Solid.
- B) Bromine – ✔ Reddish-brown liquid non-metal.
- C) Chlorine – Gas.
- D) Phosphorus – Solid.
Q8. Which of the following metals is soft and can be cut with a knife?
A) Iron
B) Copper
C) Sodium
D) Aluminium
✅ Correct Answer: C) Sodium
Explanation:
- A) Iron – Hard metal.
- B) Copper – Harder, not cut with knife.
- C) Sodium – ✔ Very soft alkali metal.
- D) Aluminium – Harder metal.
Q9. Which of these metals is the best conductor of electricity?
A) Aluminium
B) Copper
C) Silver
D) Iron
✅ Correct Answer: C) Silver
Explanation:
- A) Aluminium – Good conductor, but not best.
- B) Copper – Very good conductor, second to silver.
- C) Silver – ✔ Best conductor of electricity.
- D) Iron – Conducts but less than copper.
Q10. Which non-metal is used in making matchsticks?
A) Sulphur
B) Carbon
C) Chlorine
D) Iodine
✅ Correct Answer: A) Sulphur
Explanation:
- A) Sulphur – ✔ Used on matchstick heads.
- B) Carbon – Pencil lead, fuels.
- C) Chlorine – Disinfectant gas.
- D) Iodine – Used in medicine.
Q11. Which property is common in most metals?
A) Sonority
B) Poor conductor
C) Brittle
D) Dull
✅ Correct Answer: A) Sonority
Explanation:
- A) Sonority – ✔ Metals produce ringing sound.
- B) Poor conductor – Non-metals.
- C) Brittle – Non-metals.
- D) Dull – Non-metals.
Q12. Which non-metal is essential for life?
A) Phosphorus
B) Oxygen
C) Sulphur
D) Carbon dioxide
✅ Correct Answer: B) Oxygen
Explanation:
- A) Phosphorus – Present in bones/teeth.
- B) Oxygen – ✔ Needed for respiration.
- C) Sulphur – Non-essential.
- D) Carbon dioxide – Plant use, not respiration.
Q13. Which metal is used in making aircraft bodies?
A) Iron
B) Aluminium
C) Copper
D) Lead
✅ Correct Answer: B) Aluminium
Explanation:
- A) Iron – Heavy, corrodes easily.
- B) Aluminium – ✔ Light and strong, ideal for aircraft.
- C) Copper – Heavy, expensive.
- D) Lead – Soft, heavy.
Q14. Which of these metals is the lightest?
A) Sodium
B) Aluminium
C) Lithium
D) Iron
✅ Correct Answer: C) Lithium
Explanation:
- A) Sodium – Light but not the lightest.
- B) Aluminium – Light, but heavier than lithium.
- C) Lithium – ✔ Lightest metal.
- D) Iron – Heavy.
Q15. Which non-metal is used to disinfect drinking water?
A) Nitrogen
B) Iodine
C) Chlorine
D) Phosphorus
✅ Correct Answer: C) Chlorine
Explanation:
- A) Nitrogen – Not disinfectant.
- B) Iodine – Antiseptic for wounds.
- C) Chlorine – ✔ Kills germs in water.
- D) Phosphorus – Matchsticks.
Q16. Which property is shown by non-metals?
A) Sonority
B) Brittleness
C) Ductility
D) Malleability
✅ Correct Answer: B) Brittleness
Explanation:
- A) Sonority – Metals.
- B) Brittleness – ✔ Non-metals break easily.
- C) Ductility – Metals.
- D) Malleability – Metals.
Q17. Which metal is used for making wires?
A) Copper
B) Zinc
C) Sodium
D) Lead
✅ Correct Answer: A) Copper
Explanation:
- A) Copper – ✔ Ductile, good conductor.
- B) Zinc – Used for coating.
- C) Sodium – Too soft, reactive.
- D) Lead – Poor conductor.
Q18. Which metal is used in thermometers?
A) Copper
B) Mercury
C) Aluminium
D) Iron
✅ Correct Answer: B) Mercury
Explanation:
- A) Copper – Wires.
- B) Mercury – ✔ Expands uniformly with heat.
- C) Aluminium – Lightweight metal.
- D) Iron – Heavy metal.
Q19. Which non-metal is used in making pencils?
A) Sulphur
B) Graphite
C) Phosphorus
D) Bromine
✅ Correct Answer: B) Graphite
Explanation:
- A) Sulphur – Matchsticks.
- B) Graphite – ✔ Form of carbon, conducts electricity.
- C) Phosphorus – Explosive in nature.
- D) Bromine – Liquid non-metal.
Q20. Which of these metals is NOT malleable?
A) Gold
B) Silver
C) Sodium
D) Iron
✅ Correct Answer: C) Sodium
Explanation:
- A) Gold – Very malleable.
- B) Silver – Very malleable.
- C) Sodium – ✔ Soft, breaks easily.
- D) Iron – Malleable.
Q21. Which gas is produced when metals react with acids?
A) Carbon dioxide
B) Oxygen
C) Hydrogen
D) Nitrogen
✅ Correct Answer: C) Hydrogen
Explanation:
- A) Carbon dioxide – Reaction with carbonates.
- B) Oxygen – Not correct.
- C) Hydrogen – ✔ Metals + acids → salt + hydrogen.
- D) Nitrogen – Not produced.
Q22. Which metal is used in galvanisation?
A) Aluminium
B) Zinc
C) Copper
D) Lead
✅ Correct Answer: B) Zinc
Explanation:
- A) Aluminium – Not used.
- B) Zinc – ✔ Coating to prevent rusting.
- C) Copper – Electrical uses.
- D) Lead – Batteries.
Q23. Which of the following is the hardest natural substance?
A) Gold
B) Iron
C) Diamond
D) Graphite
✅ Correct Answer: C) Diamond
Explanation:
- A) Gold – Soft metal.
- B) Iron – Hard but not the hardest.
- C) Diamond – ✔ Hardest form of carbon.
- D) Graphite – Soft carbon allotrope.
Q24. Which of these is used for making jewellery?
A) Iron
B) Silver
C) Aluminium
D) Sodium
✅ Correct Answer: B) Silver
Explanation:
- A) Iron – Rusts easily.
- B) Silver – ✔ Shiny, malleable, used in ornaments.
- C) Aluminium – Used in industry.
- D) Sodium – Too reactive.
Q25. Which metal is stored under kerosene oil?
A) Aluminium
B) Copper
C) Sodium
D) Iron
✅ Correct Answer: C) Sodium
Explanation:
- A) Aluminium – Forms oxide layer, safe in air.
- B) Copper – Stable in air.
- C) Sodium – ✔ Highly reactive, kept in kerosene.
- D) Iron – Rusts slowly, not stored under kerosene.
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