Chemistry Chapter 12 Entry Test MCQs
51. Which of the following compound is not colourless?
a. [Zn(H2O)6]Cl2
b. [Sc(NH3)6]Cl3
c. [Fe(H2O)6]SO4
d. Na2[TiCl6]
52. f-block elements are also called
a. Alkaline earth elements
b. Outer transition element
c. Coinage metal
d. Inner transition elements
53. The element with the outer electronic structure 3d54s2 will be expected to:
i) Form colored ions
ii) Form complex compounds
iii) Have stable electronic configuration
a. Only 3 is correct
b. 1, 2 and 3 are correct
c. Only 2 is correct
d. 1 and 2 are correct
54. The transition metal ion which is not coloured
a. Zn+2
b. Fe+3
c. Cu+2
d. Cr+3
55. Which of the following group of d-block elements is called non-typical transition element?
a. VB
b. IB
c. VIII B
d. IIB
56. The colour which has the highest wave length is
a. green
b. red
c. violet
d. yellow
57. d-d transition is not possible in
a. Cu
b. Cr
c. Zn
d. Mn
58. Typical transition elements show which of the following characteristic properties
a. Formation of complex ion
b. Variable oxidation state
c. Coloured compounds
d. all of the above
59. _____is used as catalyst in Haber’s process for NH3 gas manufacture:
a. Carbon
b. Iron
c. Silver
d. Copper
60. The catalyst proves to be most effective in case of hydrogenation at room temperature is:
a. Pt
b. Ni
c. Ag
d. Hg
61. An element has atomic number 20. If one electron is removed it becomes M+, then its outermost shell will contain number of electrons:
a. 2
b. 1
c. 4
d. 3
62. Which ion does not exhibit colour in aqueous solution:
a. Cr2+
b. Ti4+
c. Fe3+
d. Ni2+
63. The metal ion having maximum binding energy is:
a. Fe
b. V
c. Cr
d. Mn
64. The transition element which can show highest oxidation state is:
a. Co
b. V
c. Mn
d. Ni
Co-ordination/ Complex compounds
65. The complex [Ti(H2O)6]+3 absorbs yellow light then it looks like to be:
a. Violet
b. Blue
c. Red
d. Yellow
66. In the complex [E(en)2(C2O4)]NO2 (where (en) is ethylenediamine) _______are the coordination number and the oxidation state of the element ‘E’ respectively.
a. 4 and 3
b. 6 and 2
c. 6 and 3
d. 2 and 2
67. The sum of coordination number and oxidation number of the metal M in the complex [M(en)2(C2O4)]Cl (where (en) is ethylenediamine) is
a. 7
b. 9
c. 8
d. 6
68. When aqueous solutions of KCN and Fe(CN)2 are mixed together, we get
a. Fe+2, K+1
b. Fe+2, K+1, CN–
c. Fe+2, [K(CN)6]-5
d. [Fe(CN)6]-4 and K+1
69. Ethylenediaminetetraacetate (EDTA) is a:
a. Bidentate ligand
b. Monodenate ligand
c. Tridentate ligand
d. Polydentate ligand
70. Which of the following ligands does not form chelates?
a. Hydrazine
b. Oxalate
c. Acetate
d. EDTA
71. Coordination number and oxidation state of in complex K2[Fe(en)(OH)2(C2O4)]:
a. 6, +2
b. 3, +4
c. 4, +2
d. 6, +4
72. Which specie do not act as ligand in formation of complexes?
a. NH4+
b. CH3NH2
c. OH–
d. Cl–
73. Compounds containing CN- are toxic, 50 mg of CN- being fatal to humans. Which of the following do not contain free CN- in: i) NH4CN ii) KCN iii) [Fe(CN)6]-4
a. Only 3
b. 1 and 2
c. Only 1
d. 2 and 3
74. Which of the following pair represents bi-dentate ligand?
a. C2O4-2, CO
b. EDTA, DMG
c. en, C2O4-2
d. en, EDTA
75. The oxidation state and coordination number of Co in [Co(NO2)3 (NH3)3] is respectively
a. 3,6
b. 6,2
c. 6,0
d. 6,3