CHAPTER # 6.
Transition Elements
1. Which of the following is a non-typical transition element ?
(A) Cr (B) Mn
(C) Zn (D) Fe
2. Which of the following is a typical transition metal ?
(A) Sc (B) Y
(C) Ra (D) Co
3. f-block elements are so called.
(A) Non-typical transition element
(B) Outer transition elements
(C) Normal transition elements
(D) Inner transition
4. The strength of binding energy of transition
elements depends upon
(A) Number of electron pairs
(B) Number of unpaired electrons
(C) Number of neutrons
(D) Number of protons
5. Group VIB of transition elements contains
(A) Zn, Cd , Hg (B) Fe, Ru, Os
(C) Cr, Mo, W (D) Mn, Te, Re
6. Which is the formula of tetra-amine chloro nitro platinum (IV) sulphate ?
(A) [Pt(NH3)4(NO2)]SO4
(B) [Pt NO2CI (NH3)4]SO4
(C) [Pt CI (NO2)(NH3)]SO4
(D) [Pt (NH3)4(NO2)CI]SO4
7. The percentage of carbon in different types of iron products is in the order of .
(A) Cast iron > wrought iron > steel
(B) wrought iron > steel > cast iron
(C) cast iron > steel > wrought iron
(D) cast iron = steel > wrought iron
8. The colour of transition metal complexes is due to.
(A) d-d transitions of electrons
(B) Para magnetic nature of transition element
(C) Ionization
(D) Loss of s-electrons
9. Coordination number of Pt in
[t CI (NO2)(NH3)4]-2 is.
(A) 2- (B) 4
(C) 1 (D) 6
10. The total number of transition elements is.
(A) 10 (B) 14
(C) 40 (D) 50
11. Transition metals have very high melting and
boiling points due to.
(A) Weak binding forces
(B) Strong binding forces
(C) Both of the above
(D) None of the above
12. Substances which are weakly attracted by which type of force are called as paramagnetic
substances.
(A) Weak magnetic field
(B) Strong magnetic field
(C) Feeble magnetic field
(D) None of the above
13. The diamagnetic substances are
(A) Weakly repelled by a strong magnetic field
(B) Strongly repelled by a weak magnetic field
(C) Strongly repelled by a weak magnetic field
(D) Weakly repelled by a weak magnetic field.
14. Paramagnetic behaviour is caused by the
presence of.
(A) Unparied electrons
(B) Paired electrons
(C) Paired protons
(D) Paired electrons in an aton, molecule or
ion
15. The transition elements includes.
(A) Ti, Fe, Cr, Ni, Cu etc
(B) Ti, Fe, Nb, Ta, Th, etc
(C) Mo, W, Zr, Nb, etc
(D) Ti, Fe, Ci, Ni, Cu, Mo, W, Zr, Nb, Ta, Th, etc
16. Zn has
(A) Zero unpaired electrons
(B) Five unpaired electrons
(C) Three unpaired electrons
(D) One paired electrons
17. In transition elements the orbital which is
responsible for the colour development is.
(A) s-orbital (B) f-orbital
(C) d-orbital (D) o-orbital
18. In [Ti (H2O6)]3+ which wavelength of light is
absorbed.
(A) Yellow light is absorbed while blue and red light are transmitted
(B) Green light is absorbed
(C) Both of the above
(D) None of the above
19. Alloy steels are
(A) Iron atoms substituted by Cr, Mn, and Ni
atoms
(B) Iron atoms substituted by Cr, and Mn
atoms
(C) Iron atoms substituted by Mn and Ni atoms
(D) None of the above
20. Such compounds containing the complex
molecules or complex ions and capable of.
(A) Dependent existence are called
coordination compounds
(B) Independent existence are called
coordination compound
(C) None of the above
(D) A & B
21. A complex compound may contain
(A) Simple catoins and a complexions
(B) A complex cations and a simple anion
(C) Both of the above
(D) None of the above
22. The nomenclature of complex compounds is based upon the recommendation by the
(A) Inorganic Nomenclature Committee
(IUPAC)
(B) Organic Nomenclature Committee (IUPAC)
(C) Both of the above
(D) None of the above
23. In writing the formula of a complex ion the usual practice is to place the symbol of the
(A) Central metal atom second
(B) Central metal atom third
(C) Central metal atom 4rth
(D) Central metal atom 1st
24. Pig iron or cast iron contains
(A) 0.25% to 2.5% carbon
(B) 2.5% to 4.5% carbon
(C) 0.12% to 0.25% carbon
(D) None of the above
25. Wrought iron is manufactured from
(A) Pig iron (B) Cast iron
(C) Pig iron or cast iron (D) Steel
26. In open hearth process for the manufacturing of steel.
(A) Using cast iron, wrought iron, or steel
scrap
(B) Using cast iron
(C) just wrought iron
(D) None of the above
27. In galvanic cell.
(A) Al does not releases electrons and
changes to al+3 ion
(B) Ai releases and changes to Al+3 ion
(C) Both of the above
(D) Both of the above
28. The amount of iron destroyed each year by
corrosion equal to.
(A) About 1/4th of its annual production
(B) About 1/3rd of its annual production
(C\) Both 1/2nd of its annual production
(D) None of the above
29. Almost all the chromates are
(A) Blue in colour (B) Green in colour
(C) Red in colour (D) Yellow in colour
30. K2Cr2O7(potassium dichromate) is used
extensively for.
(A) Dyeing
(B) Chrome tanning
(C) As an oxidizing agent
(D) All of the above are true
31. The location of transition elements is in
between_________
Lanthanides & actinides
s and p block elements
chalcogens and halogens
d and f block elements
32. Compounds attracted by applied magnetic field are called________
a) Diamagnetic b) Paramagnetic
c) Good conductor d) Ferromagnetic
33. When light is exposed to transition element, then electrons jumps from lower orbitals to
higher orbitals in___________
a) f-orbitals b) s-orbitals
c) p-orbitals d) d-orbitals
34. The specie which donates electrons to central
metal atom in co-ordination sphere is called
________
a) Anion b) Cation
c) Ligand d) Acid
35. Following ion is a bidentate Ligand?
a) Ammonia b) Oxalate
c) Carbonyl d) Cyanide
36. The central atom along with Ligand is called ________
a) Complex ion b) Coordination sphere
c) Ligand d) Complex compound
37. Geometry of complex compounds depends
upon_________
a) no. of ligand
b) no. of chelates
c) hybridization of central metal
d) All of above
38. For sp3d2 hybridization, the expected geometry will be_________
a) Tetrahydral b) Square planar
c) Trigonal bipyramidal d) Octahedral
39. Any process of chemical decay of metals due to action of surrounding medium is called
_________
a) Surrounding b) Enamel
c) Corrosion d) Coating
40. When an active metal like Al come in contact with less active element like Cu, then it
produces _____
a) Voltaic cell b) Galvanic cell
c) Electrolytic cell d) a & b
41. Which element has complete d – orbital are
a) Ni b) Fe
c) Zn d) Mn
42. In Ag2+ the number of electrons in 4 d orbital is
a) 7 b) 8
c) 6 d) 9
43. A regular decrease in ionic and atomic radii across the lanthanides is called
Contraction
I.P
Lanthanide Contraction
Complex formation
44. The magnetic moment can be measured by
a) Gouy’s balance b) Haber’s balance
c) Down’s balance d) All of these
45. The magnetic moment is related to the number of unpaired electrons (n) by the equation
a) EMBED Equation.3 b) EMBED Equation.3
c) EMBED Equation.3 d) EMBED Equation.3
46. Diamagnetic compounds are those which have
a) Paired electrons b) Unpaired electrons
c) Free electrons d) No electrons
47. An extreme case of Para magnetism is called
a) Diamagnetism b) Ferro magnetism
c) Isomerism d) None of these
48. The number of ligands attached to the central metal atom or ion, usually varying from
a) 2 to 3 b) 2 to 4
c) 2 to 6 d) 2 to 7
49. Co-ordinate compound with co-ordinate six number have geometry
Tetrahedral
Square planner
May be tetrahedral or square planner
Octahedral
50. Steel is an alloy of iron and is classified into
Mild steel (0.1 – 0.2%C) and medium carbon steel (0.2 to 0.7%C)
Medium carbon steel (0.2 to 0.7%C) and high carbon steel (0.7 to 1.5%C)
Mild and high carbon steel
Mild medium and high carbon steel
51. Ligands are classified into
a) One b) Two
c) Three d) Five
52. EDTA is
a) Monodentate b) Bidentate
c) Polydentate d) None of these
53. Which one is Bidentate ligand
a) Cl-1 b) NH3
c) NH2(CH2), NH2 d) EDTA
54. Complexes which are less common have co-ordination number
a) 4 b) 5
c) 6 d) All of these
55. Complexes which have octahedral geometry hybridized
a) SP3 b) dSP2
c) dSP3 d) d2SP3
56. The geometry of a complex depends upon
Co-ordination number
Type of hybridization of central metal atom
Chelates
Both a & b
57. Brass contain 20% zinc and
a) 80% Cu b) 70% Cu
c) 60% Cu d) 50% Cu
58. Bell metal contains
80% Cu + 20% Zn
80% Cu + 20% Sn
20% Cu + 80% Zn
20% Cu + 80% Sn
59. The formula of blue vitriol is
a) CuSO4 b) CuSO4.3H2O
c) CuSO4.4H2O d) CuSO4.5H2O
60. The transition elements usually have very
______ melting and boiling points.
a) Low b) High
c) Intermediate d) None of these
61. Finely divided iron is used in _______
a) Haber process
b) Catalytic Hydrogenation
c) Oxidation of ammonia to nitric oxide
d) Contact process
62. ________ reagent can be used to identify
Cu2+ ion.
a) Nitric acid b) Sulphuric acid
c) Sodium hydroxide d) Potassium dichromate
63. _______ is the important ore of copper.
a) Malachite b) Bauxite
c) Blue Vitriol d) Alumina
64. Titanium is used as catalyst in _______
a) Haber process
b) Catalytic hydrogenation
c) Oxidation of ammonia to nitric acid
d) Polymerization of ethyle into polyethylene
65. An adding KI to a solution of CuSO4
a) Cupric oxide is precipitated
b) Metallic copper is precipitated
c) Cuprous iodide is precipitated with the
liberation of iodine
d) No change takes place
66. In Cr2O72 every Cr atom is linked to
a) Two O atoms b) Three O atoms
c) Four O atoms d) Five O atoms
67. A substance which have even number of
electrons and have paired spin is called
______
a) Ferromagnetic b) Paramagnetic
c) Dimagnetic d) None of these
68. The empty spaces between atoms of transition
metals in their crystal lattices are called _____
a) Vacant spaces b) Valence spaces
c) Interstices d) None of these
69. [Ni(CN)4]2- is an example of ________
a) Square planar
b) Tetrahedral complexes
c) Octahedral complexes
d) None of these
70. [Cu(NH3)4]2+ is an example of _______
a) Square planar
b) Tetrahedral complexes
c) Octahedral complexes
d) None of these
71. [Co(NH3)6]3+ is an example of _______
a) Square planar
b) Tetrahedral complexes
c) Octahedral complexes
d) None of these
72. The names of ______ are usually unchanged.
a) Anionic ligands b) Cationic ligands
c) Neutral ligands d) None of these
73. The suffix “ate” at the end of the name of the
coordinate complex ion represents a/an
______
a) Cation b) Anion
c) Cathode b) Anode
74. Ferric oxide is _______
a) A basic anhydride
b) An acid anhydride
c) An amphoteric anhydride
d) Green in colour
75. The most strongly ferromagnetic element is
_______
a) Fe b) Co
c) Ni d) Os
76. The property of a substance which permits it
being drawn into wire is called ________
a) Softness b) Ductility
c) Brittleness d) Hardness
77. When potassium permanganate is added to a
saturated aqueous solution of potassium
hydroxide, _______ gas is evolved.
a) Hydrogen b) Oxygen
c) Carbon dioxide d) None of these
78. AgCl dissolves in u solution of NH3 but not in
water because;
a) NH3 is a better solvent than H2O
b) Ag+ forms a complex ion with NH3
c) NH3 is a stronger base than H2O
d) Dipole moment of water is higher than NH3
79. Which of the following is deliquescent?
a) ZnCl2 b) Hg2Cl2
c) HdCl2 d) HgCl2
80. CrO3 dissolves in aqueous NaOH to give
a) EMBED Equation.3 b) Cr(OH)2
c) EMBED Equation.3 d) Cr(OH)3
81. Iron obtained from the blast furnace is called
a) Pig iron b) Cast iron
c) Wrought iron d) Steel
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