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Level 0 Answer Key: Metals and Non-Metals

Class: 10 Science Type: Basics Key Verified Answers
Section A: Physical Properties (Q1-10)
1. True
2. False
3. False
4. True
5. True
6. True
7. False
8. False
9. True
10. True
Section B: Definitions (Q11-15)
11. Malleability: Property of metals to be beaten into thin sheets.
12. Ductility: Property of metals to be drawn into thin wires.
13. Sonorous: Property of metals to produce a ringing sound when struck.
14. Ore: A mineral from which a metal can be extracted profitably.
15. Gangue: Impurities (like sand, clay) present in an ore.
Section C: Exceptions (Q16-25)
16. Mercury (Hg)
17. Bromine (Br)
18. Iodine
19. Sodium, Potassium
20. Gallium, Caesium
21. Graphite
22. Basic
23. Acidic
24. Gold (Au)
25. Dazzling white
Section D: Chemical Basics (Q26-35)
26. Metal
27. Hydroxide
28. Hydrogen
29. Magnesium Oxide (MgO)
30. Sodium Hydroxide (NaOH)
31. Iron(II,III) Oxide (Fe$_3$O$_4$)
32. Copper Oxide (CuO)
33. Hydrogen ($H_2$)
34. Displacement
35. Sulphide
Section E: Alloys & Composition (Q36-50)
36. Zinc (Zn)
37. Tin (Sn)
38. Tin (Sn)
39. Chromium (Cr)
40. Mercury (Hg)
46. Zinc (Zn)
47. Basic Copper Carbonate
48. Bauxite
49. Anode Mud (Impurities)
50. No