#### Creative two mark questions Basic Concepts of Chemistry and Chemical Calculations - II

11th Standard

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Chemistry

Time : 01:30:00 Hrs
Total Marks : 100

Part - A

50 x 2 = 100
1. Calculate the equivalent mass of the following - Aluminium hydroxide

2. Calculate the equivalent mass of the following - Sodium Hydroxide

3. Calculate the equivalent mass of the following - Potassium Sulphate

4. Explain the term limiting reagent.

5. 3 grams of hydrogen reacts with 29 g of O, to yield H2O. Which is the limiting reagent?

6. Define - Empirical formula of a compound

7. Define - Molecular formula of a compound

8. 3 grams of hydrogen reacts with 29 g of O, to yield H2O. Calculate the maximum amount of H2O that can be formed.

9. 3 grams of hydrogen reacts with 29g of O, to yield H2O. Calculate the amount of one of the reactants which remains unreacted.

10. What do you understand by the term 'stoichiometry of the reaction?

11. Define gram equivalent mass of an element.

12. What is "equivalence factor 'n'?"How is it useful in determining the equivalent mass of a substance?

13. What is the equivalence factor (n) for H2SO4

14. What is the equivalence factor (n) for Ba(OH)2

15. What is the equivalence factor (n) for K2Cr2O7

16. Calculate the equivalent mass of the following:H3PO4.

17. Calculate the equivalent mass of the following:CO3-2,

18. The density of carbon dioxide is equal to 1.977 kg m-3 at 273 K and 1 atm pressure. Calculate the molar mass of CO2

19. Calculate the molar mass of the following. - Ethanol (C2H5OH)

20. Calculate the molar mass of the following. - Potassium permanganate (KMnO4)

21. Calculate the molar mass of the following. - Potassium dichromate (K2Cr2O7)

22. Calculate the molar mass of the following. - Sucrose (C12H22O11)

23. What is molar volume?

24. What do you understand by the terms acidity and basicity?

25. Calculate the equivalent mass of hydrated sodium carbonate.

26. What do you understand by the terms empirical formula and molecular formula?

27. Define matter. What are the types of matter?

28. Prove that states of matter are inter convertible

29. What is meant by Plasma state? Give an example.

30. Differentiate an element and an atom

31. Distinguish between a molecule and a compound.

32. Chlorine has fractional average atomic mass. Justify this statement.

33. Define molecular mass of a substance.

34. Calculate the molecular mass of Sulphuric acid (H2SO4)

35. Calculate the number of moles present in 60 g of ethane.

36. Calculate the equivalent mass of Copper. (Atomic mass of copper = 63.5)

37. Calculate the equivalent mass of - Sulphate ion

38. Calculate the equivalent mass of - Phosphate ion (PO43-)

39. Calculate the equivalent mass of sulphuric acid

40. How many moles of hydrogen is required to produce 20 moles of ammonia?

41. How much volume of Carbon dioxide is produced when 25 g of calcium carbonate is heated completely under standard conditions?

42. How much volume of chlorine is required to prepare 89.6 L of HCI gas at STP?

43. What is meant by limiting reagent?

44. On the formation of SF6 by the direct combination of S and F2 which is the limiting reagent? Prove it.

45. Mention any 4 redox reaction that takes place in our daily life.

46. Calculate the oxidation number of underlined elements in the following. - KMnO4

47. Calculate the oxidation number of underlined elements in the following. - Cr2O72-

48. If 10 volumes of H2 gas react with 5 volumes of O2 gas, how many volumes of water vapour would be produced?

49. What will be the mass of one 12C atom in g?

50. Justify the following reaction is a redox reaction. ${CuO}_{(s)}+{H}_{{2}_{(g)}}\rightarrow{Cu}_{{(s)}}+{H}_{2}{O}_{(g)}$