1. Basic Concepts of Chemistry

2 & 3 Marks

1. Define Matter.

2. What is an Element? Give examples.

3. What are Molecules? Give examples.

4. What are Compounds? Give examples.

5. It is not possible to measure the Atomic Mass directly. Why?

6. What is Unified Atomic Mass? Give its value.

7. What is amu? Give its value.

8. What is Relative Atomic Mass?

9. What is Average Atomic Mass?

10. Define Molecular Mass / Relative Molecular Mass.

11. Define Mole. Or What do you understand by the term Mole?

12. What is Avogadro Number?

13. What is the difference between Molecular Mass and Molar Mass? Calculate the Molecular Mass and Molar Mass for Carbon monoxide.

14. How can you calculate the Relative Molecular Mass (of any compound / molecule)?

15. Calculate the Molar Mass of the following.

      i) Ethanol (C2H5OH)                                            ii) Potassium permanganate (KMnO4)

      iii) Potassium dichromate (K2Cr2O7)                   iv) Sucrose (C12H22O11)

16. What is Molar Mass? Give its unit.

17. What is Molar Volume?

18. Give the value of Molar Volume at different conditions.

19. What is the basis of Mole concept?

20. What is the basis of Gram equivalent concept?

21. Define Gram equivalent mass.

22. Define Equivalent Mass of Acid.

23. Define Equivalent Mass of Base.

24. Define Equivalent Mass of Oxidising Agent.

25. Define Equivalent Mass of Reducing Agent.

26. What is Empirical formula? Give example.

27. How can you arrive Molecular formula of a compound from Empirical formula?

28. What is Molecular formula? Give example.

29. What is Stoichiometry?

30. What is the use of the concept of Stoichiometry?

31. What is Limiting Reagent? What is Excess Reagent?

32. What is Oxidation? Give example.

33. What is Reduction? Give example.

34. Distinguish between Oxidation and Reduction.

35. What are Redox reactions? Give example.

36. What is Oxidation Number? Or What is Oxidation State? Or

      What do you understand by the term Oxidation number?

37. What are Oxidising agents? Or What are Oxidants?

38. What are Reducing agents?

39. Mention the Types of Redox Reactions.

40. What are Combination reactions? Give example.

41. What are Decomposition reactions? Give example.

42. What are Displacement reactions? Give example.

43. How is Displacement reactions classified? Give example.

44. What are Disproportionation reactions? Give example. Or

      What are Auto redox reactions? Give example.

45. What are Competitive electron transfer reactions? Give example.

46. What is the Basic Principle in Balancing the equation of redox reactions?

5 Marks

1. How is Matter classified? Give examples for each type.

2. By applying the knowledge of chemical classification, classify each of the following into Elements, Compounds or Mixtures.

    i) Sugar                    ii) Sea water                iii) Distilled water                   iv) Carbon dioxide

    v) Copper wire        vi) Table salt                vii) Silver plate                 viii) Naphthalene balls

3. How can you determine the Empirical formula of a compound from Elemental analysis data?

4. Give the Rules for Calculation of Oxidation number.

5. Give the Rules for Balancing the equation of redox reactions by Oxidation number method.

6. Give the Rules for Balancing the equation of redox reactions by Ion-electron method / Half reaction method.