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VARDAAN LEARNING INSTITUTE

Level 0 Answer Key: Acids, Bases & Salts

Class: 10 Science Type: Basics & Formulae Key Verified Answers
Section A: Indicators & Colors (Q1-10)
1. Red
2. Blue
3. Colourless
4. Pink
5. Red (Orange)
6. Yellow
7. Reddish-Brown (Red)
8. Lichens
9. Smell
10. Vanishes
Section B: Basics & Definitions (Q11-20)
11. Sour
12. Bitter, Soapy
13. Alkalis
14. Neutralisation
15. Basic
16. Acidic
17. Hydrogen ($H^+$)
18. Hydroxide ($OH^-$)
19. Exothermic
20. Lactic acid
Section C: Key Reactions (Q21-25)
21. Hydrogen gas ($H_2$)
22. Carbon dioxide ($CO_2$)
23. Water ($H_2O$)
24. Water ($H_2O$)
25. Sodium Chloride (NaCl)
Section D: The pH Scale (Q26-35)
26. 7
27. Acidic
28. Basic
29. pH 2
30. pH 13
31. 5.5
32. Formic acid (Methanoic)
33. 5.6
34. Hydrochloric (HCl)
35. Antacids
Section E: Common Salts & Formulae (Q36-45)
36. $NaCl$
37. $NaOH$
38. $NaHCO_3$
39. $Na_2CO_3 \cdot 10H_2O$
40. $CaOCl_2$
41. $CaSO_4 \cdot \frac{1}{2}H_2O$
42. $CaSO_4 \cdot 2H_2O$
43. $Ca(OH)_2$
44. $CaO$
45. $Ca(OH)_2$ (aq)
Section F: Chemical Names (Q46-50)
46. Sodium Hydrogen Carbonate (Sodium Bicarbonate)
47. Sodium Carbonate Decahydrate (Washing Soda)
48. Calcium Oxychloride (Bleaching Powder)
49. Calcium Sulphate Hemihydrate (Plaster of Paris)
50. Copper Sulphate Pentahydrate (Blue Vitriol)