Answers: Worksheet 1 Metals and Non metals 2024-25
1. *Which of the following is a property of metals?*
- a) Ductility
- b) Brittle
- c) Poor conductor of heat
- d) Non-malleable
*Answer:* a) Ductility
2. *Which metal is the best conductor of electricity?*
- a) Iron
- b) Copper
- c) Silver
- d) Aluminium
*Answer:* c) Silver
3. *Which non-metal is essential for life?*
- a) Carbon
- b) Sulfur
- c) Phosphorus
- d) Nitrogen
*Answer:* a) Carbon
4. *Which of the following is a metalloid?*
- a) Carbon
- b) Silicon
- c) Oxygen
- d) Phosphorus
*Answer:* b) Silicon
5. *What is the nature of oxides of non-metals?*
- a) Acidic
- b) Basic
- c) Amphoteric
- d) Neutral
*Answer:* a) Acidic
6. *Which of the following metals reacts vigorously with cold water?*
- a) Copper
- b) Magnesium
- c) Sodium
- d) Zinc
*Answer:* c) Sodium
7. *Which metal is used to galvanize iron?*
- a) Zinc
- b) Lead
- c) Tin
- d) Aluminium
*Answer:* a) Zinc
8. *Which of the following is an example of a displacement reaction?*
- a) 2H₂ + O₂ → 2H₂O
- b) CuSO₄ + Fe → FeSO₄ + Cu
- c) NaCl + AgNO₃ → NaNO₃ + AgCl
- d) 2Mg + O₂ → 2MgO
*Answer:* b) CuSO₄ + Fe → FeSO₄ + Cu
9. *Which metal does not react with dilute hydrochloric acid?*
- a) Zinc
- b) Aluminium
- c) Iron
- d) Copper
*Answer:* d) Copper
10. *Which non-metal is used in the purification of water?*
- a) Chlorine
- b) Sulfur
- c) Phosphorus
- d) Oxygen
*Answer:* a) Chlorine
11. *Which of the following metal oxides is amphoteric?*
- a) Sodium oxide
- b) Magnesium oxide
- c) Aluminium oxide
- d) Calcium oxide
*Answer:* c) Aluminium oxide
12. *What happens when a metal reacts with an acid?*
- a) Hydrogen gas is evolved
- b) Oxygen gas is evolved
- c) Water is formed
- d) Carbon dioxide is formed
*Answer:* a) Hydrogen gas is evolved
13. *Which metal is used in making electrical wires?*
- a) Iron
- b) Copper
- c) Silver
- d) Gold
*Answer:* b) Copper
14. *Which non-metal is used in the manufacturing of matchsticks?*
- a) Phosphorus
- b) Sulfur
- c) Carbon
- d) Nitrogen
*Answer:* a) Phosphorus
15. *What is formed when a metal reacts with oxygen?*
- a) Metal oxide
- b) Metal carbonate
- c) Metal hydroxide
- d) Metal sulfate
*Answer:* a) Metal oxide
16. *Which of the following metals is found in the liquid state at room temperature?*
- a) Sodium
- b) Potassium
- c) Mercury
- d) Iron
*Answer:* c) Mercury
17. *Which of the following metals can be easily cut with a knife?*
- a) Iron
- b) Sodium
- c) Zinc
- d) Copper
*Answer:* b) Sodium
18. *Which gas is produced when zinc reacts with dilute sulfuric acid?*
- a) Oxygen
- b) Hydrogen
- c) Nitrogen
- d) Carbon dioxide
*Answer:* b) Hydrogen
19. *Which non-metal is a good conductor of electricity?*
- a) Carbon (in the form of graphite)
- b) Sulfur
- c) Phosphorus
- d) Chlorine
*Answer:* a) Carbon (in the form of graphite)
20. *Which metal is the most reactive?*
- a) Gold
- b) Silver
- c) Potassium
- d) Iron
*Answer:* c) Potassium
21. *Which process is used for the extraction of metals from their ores?*
- a) Refining
- b) Smelting
- c) Galvanization
- d) Alloying
*Answer:* b) Smelting
22. *Which of the following metals does not corrode easily?*
- a) Aluminium
- b) Copper
- c) Gold
- d) Iron
*Answer:* c) Gold
23. *Which of the following is a noble gas?*
- a) Helium
- b) Oxygen
- c) Nitrogen
- d) Chlorine
*Answer:* a) Helium
24. *What is the process of coating iron with zinc called?*
- a) Alloying
- b) Smelting
- c) Galvanization
- d) Refining
*Answer:* c) Galvanization
25. *Which metal is used in the making of batteries?*
- a) Iron
- b) Copper
- c) Lead
- d) Gold
*Answer:* c) Lead
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