2nd Year Chemistry Chapter 6 Transition Elements Notes Solution

chemistry 12th notes chapter No 6

1. Bessemer converter is used in the manufacture of:

 
 
 
 

2. Which of following is a very powerful oxidant :

 
 
 
 

3. The percentage of carbon in wrought iron is:

 
 
 
 

4. Formula of chromyl chloride is:

 
 
 
 

5. Which forms interstitial compounds?

 
 
 
 

6. Its atomic number is:

 
 
 
 

7. Chromates are salts of:

 
 
 
 

8. The percentage of carbon in different types of iron products is in the order of

 
 
 
 

9. Which of the following species has the maximum number of unpaired electrons?

 
 
 
 

10. The Chemical formula of Slag is:

 
 
 
 

11. Which of the following species has the maximum number of unpaired electrons?

 
 
 
 

12. Total number d- block elements are

 
 
 
 

13. Following property of transition elements does not vary with a regular pattern:

 
 
 
 

14. The equilibrium Cr₂O₇⁻² ↔ 2CrO₄⁻² is shifted to right in:

 
 
 
 

15. Which of the following has lowest percent age of carbon?

 
 
 
 

16. The number of unpaired electrons in Fe₃+ (Z = 26) are

 
 
 
 

17. Which element is always present with iron in steel:

 
 
 
 

18. Which is the formula of tetrammine chloro-nitro-platinum (IV) sulphate

 
 
 
 

19. Which of the following metals exist ion liquid state at room temperature?

 
 
 
 

20. Corrosion of iron can be prevented by coating the surface with:

 
 
 
 

21. Which of the following transition elements show highest oxidation state:

 
 
 
 

22. First transition series starts with:

 
 
 
 

23. The number of unpaired electrons in Ferrous ion (Z = 26) is

 
 
 
 

24. Which of the following is not an element:

 
 
 
 

25. The coordination number of transition element in [Co(NO₂)₃(NH₃)₃] is:

 
 
 
 

26. Coordination number of Pt in [Pt Cl (NO₂)(NH₃)₄]⁻² is:

 
 
 
 

27. d-block elements are also called:

 
 
 
 

28. Which of the following metal exhibits more than one oxidation states:

 
 
 
 

29. Which is the configuration of Cr:

 
 
 
 

30. How many moles of acidified FeSO₄ solution can be completely oxidized by one mole of KMnO₄:

 
 
 
 

31. Choose the correct answer about transition elements:

 
 
 
 

32. Group IIB of transition elements contains

 
 
 
 

33. In [Co(NH₃)₆]+3 the coordination number of cobalt is:

 
 
 
 

34. Coordination number of Fe in [Fe(Cₙ)₆]-4 ion is:

 
 
 
 

35. Highest oxidation state of Mn in which compound:

 
 
 
 

36. Which of the following is the electronic configuration of Cr?

 
 
 
 

37. Which of the following has the maximum number of unpaired d-electrons?

 
 
 
 

38. Which is non-typical transition elements:

 
 
 
 

39. The color of all the chromates is:

 
 
 
 

40. PCl₅ has hybridization:

 
 
 
 

41. In silver ammine complex [Ag(NH₃)₂]⁺ the coordination number of silver is:

 
 
 
 

42. Typical transition element is

 
 
 
 

43. Chemical composition of pyrolusitic is:

 
 
 
 

44. The ore of iron:

 
 
 
 

45. The highest oxidation state of Mn is there in which of the following compounds:

 
 
 
 

46. The paramagnetic behavior is the strongest for

 
 
 
 

47. Which one of the following is bidentate ligand?

 
 
 
 

48. The hybridization of Ni in [Ni(Cₙ)₄]²⁻ ion is:

 
 
 
 

49. Indicate the composition of rust:

 
 
 
 

50. The trace metal present in insulin is:

 
 
 
 

51. The chemical composition of “Surkh Kahi” is:

 
 
 
 

52. Which of the following is a non-typical transition element?

 
 
 
 

53. The strength of binding energy of transition elements depends upon

 
 
 
 

54. Which of the following is a typical transition metal

 
 
 
 

55. In the manufacture of steel by open hearth process, the slag obtained is:

 
 
 
 

56. Which of the following cation has maximum unpaired electron?

 
 
 
 

57. The number of unpaired electrons in Mn²⁺(Z=25) is:

 
 
 
 

58. Coinage metals are present in the periodic table in group:

 
 
 
 

59. Medium carbon steel is used in making:

 
 
 
 

60. f-block elements are also called:

 
 
 
 

61. The central metal atom along with ligand is called:

 
 
 
 

62. Percentage of carbon in steel is:

 
 
 
 

63. f-Block elements are also called

 
 
 
 

64. Which one of the following correctly explains the structure of [Cu(NH₃)₄]₄+

 
 
 
 

65. The shape of ions containing dSp³ hybridization is :

 
 
 
 

66. The colour of transition metal complexes is due to

 
 
 
 

67. Which of the following transition metal ions will have definite value of magnetic moment:

 
 
 
 

68. The total number of inner transition elements in the periodic table is:

 
 
 
 

69. To prevent corrosion, iron pipes carrying drinking water are covered with  Zn by process called:

 
 
 
 

70. The chemical formula of hematite is:

 
 
 
 

71. Which of the following can also be prepared by Stadeler’s process:

 
 
 
 

72. Which of the following elements is paramagnetic:

 
 
 
 

73. Coordination number of Cu in [Cu(NH₃)₄]SO₄ is:

 
 
 
 

74. Group VI B of transition elements contains:

 
 
 
 

75. No of ē-pairs accepted by the central atom in a transition metal complex is  called:

 
 
 
 

76. There are ____ types of ligands in [PtCl(NO₂)(NH₃)₄]⁻²

 
 
 
 

77. Group IB of transition elements contains:

 
 
 
 

78. In acidic medium, potassium dichromate acts as:

 
 
 
 

79. What is formula of haematite:

 
 
 
 

80. The black image on an exposed and developed photographic film is  composed of:

 
 
 
 

81. Which is a transition element?

 
 
 
 

82. Interstitial compounds are formed by:

 
 
 
 

83. The total number of transition elements is

 
 
 
 

84. Mild steel contains carbon:

 
 
 
 

85. Which one of the following compounds has oxidation state of chromium other than +6:

 
 
 
 

86. The purest form of iron is:

 
 
 
 

87. Stainless steel contain iron and:

 
 
 
 

88. The geometrical shape of PCl₅ is:

 
 
 
 

Short Questions

1. Complete and balance the following chemical equation? KMnO₄ + FeSO₄+H₂SO₄ ——–>
2. Define Paramagnetism, diamagnetism and Ferromagnetism.
3. Define sacrificial corrosion.
4. Discuss the general shape of bessemer’s converter?
5. Explain chromyl chloride test. Give chemical equation.
6. Give coordination number and oxidation number of iron (Fe) in K₄[Fe(Cₙ)₆].
7. Give examples of alloys and give their properties?
8. Give formulas of Magnetite and Haematite.
9. Give reason for the development of colours in the transition metal complexes.
10. Give the names and formulas for important ores of iron?
11. Give the uses of K₂Cr₂O₇?
12. Give the uses of potassium chromate and its structure?
13. How do compare the cast iron steel and wrought iron keeping in view their hardness malleability and melting points?
14. How do you compare KMnO₄ and K₂MnO₄?
15. How do you compare mild steel medium carbon steel and high carbon steel with respect to their carbon contents and their properties?
16. How do you compare the cast iron wrought iron and steel with respect to the percentage of carbon?
17. How do you compare the wrought iron and steel with respect to carbon,sulphur manganese and phosphorus?
18. How do you distinguish between outer transition and inner transition elements?
19. How do you remove the entrapped gases from the steel?
20. How does electrochemical theory explain the corrosion of aluminium in the presence of copper?
21. How does the metallic coating prevent the corrosion?
22. How entrapped bubbles of air removed from molten steel?
23. How KMnO₄ can be prepared by electrolytic method?
24. How KMnO₄ and H₂SO₄ act as oxidizing agents?
25. How many types of various parts are present in the transition metal complex?
26. How the acidic medium develops an equilibrium between chromate and dichromate ion?
27. How the atomic radii of d-block elements vary from left to the right in period?
28. How the ionization energy values change form left to the right in d-block elements?
29. How the property of paramagnetism is developed in the substances?
30. Indicate the shapes of the transition metal ions in which the central metal atom or iron has Sp³ dSp² and dSp³ hybridization?
31. Justify the variation of binding energies in d-block elements from left to right?
32. KMnO₄ acts as an oxidizing agent. Show with two examples.
33. What are chelates? Give an example.
34. What are chromastes and dichromates?
35. What are complementary colures? Give example?
36. What are f-block elements? Why are they called so?
37. What are interstitial compounds?
38. What are the d-block elements? why are they called so?
39. What are the uses of wrought iron?
40. What are typical and non-typical transition elements and why are they called so?
41. What is chromyl test?
42. What is co-ordinatin number and co-ordination sphere of a complex compounds?
43. What is galvanizing? How it is done?
44. What is lanthanide contraction?
45. What is ligand? Give types of ligands/ Define Ligand with an example.
46. What is meant by interstitial compound and substitutional alloy?
47. What is meant by outer transition metals and inner transition metals?
48. What is paramagnetism?What are its units?
49. What is Stadeler’s process?
50. What is the %age of carbon in different types of steel?
51. What is the reason for the development of the colors in the compounds of transition elements?or What is d-d transition?
52. What is the reason for the variations of oxidation states of transition elements?
53. What is the role of acidic and basic lining in the open hearth process for the manufacture of steel?
54. While naming the complex compounds how do you end with negatively charged ligands positively charged ligands and neutral ligands?
55. Why d-and f-block elements are called transition elements?
56. Why does damaged tin plated iron get rusted quickly?
57. Why the catalytic properties are associated with the transition elements?
58. Why the corrosion of metals is more rapid in the presence of water?
59. Why the electronic distribution of chromium and copper are different from the rest of the elements of 3d series?
60. Why the maximum paramagnetic strength is associated with the middle elements of d-block series?
61. Why the melting and boiling points are maximum somewhere in the middle of the series of d-block elements?
62. Why transition elements have variable oxidation states?
63. Write carbon content in pig iron and cast iron.
64. Write formulas of chromate and dichromate ions. In which colour they usually exist?

Long Questions

1. What are transition metals? Why are they so called?
2. Define paramagnetism and discuss behaviour in transition element.
3. Mn²⁺ and Fe²⁺ have the strongest paramagnetic behaviour while Sc³⁺ have the lowest. Discuss.
“4. Explain the following terms:
(i) Ligands (ii) Coordination Number
(iii) Chelates (iv) Coordination Sphere”
5. Explain following terms by giving examples(i) Ligands (ii) coordination sphere
6. Define the following and give on example of each. (i) ,ligand (ii) Chloroprene (iii) coordination sphere (iv) Chelate
7. Write down any four rules for renaming of compounds.
“8. Write systematic name of the following complexes:
(i) [Co(NH₃)₆] (ii) Na₃ [COF₆]
[pt(OH)₂(NH₃)₄]SO₄ (iv) K₂[ptCl]”
“9. Give Systematic names to complexes:
(i) [Pt(OH)₂(NH₃)₄]SO₄ (ii) Cr(OH)₃(H₂O)₃
(iii) K₂[Cu(Cₙ)₄] (iv) [Fe(H₂O)₆]²⁺”
10. Explain the process of manufacture of Wrought Iron from Cast iron.
11. How will you prepare Wrought iron from Cost iron by puddling Process.
12. Explain open hearth process for the manufacture of steel.
13. How steel can be manufactured by Bessemer’s process?
14. What is corrosion? Explain the electrochemical theory of corrosion.
15. Discuss Electrochemical theory of Corrosion.
16. Distinguish between cathode coating and anode coating of iron.
17. What happened when K₂Cr₂O₇ reacts with H₂S, FeSO₄, KI, NaCl separately?
18. Discuss the reaction of potassium dichromate with: (i) Hydrogen sulphide (ii) Ferrous sulphate(iii) Potassium iodide (iv) Sodium chloride
19. Write an equation for formation of Chromyl chloride. Give its applications
“20. How does potassium permanganate reacts with the following:
(i) H₂S (ii) FeSO₄ (iii) Oxalic acid (iv) KOH”
21. Describe the preparation of KmnO₄ by electrolytic oxidation process. Also its uses.
“22. Explain the following properties of transition metals.
(i) Paramagnetism (ii) Colour”
23. Define corrosion. Explain electrochemical theory of Corrosion in detail.
24. Prepare KMnO₄ byStadeler’s process and oxidation process?
“25. Write a note on these properties of transition elements:
(i) Binding energies (ii) Oxidation state.”
“26. Discuss the following properties of transition metals:
(i) Para magnetism (ii) Oxidation State “
27. Give any Four properties of Transition Elements.
“28. Write note on :
(i) Tin Plating (ii) Zinc Coating”
“29. Briefly explain the following general characteristics properties of transition elements
(i) Paramagnetism (ii) Binding Energies”

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