UNIT#12 TRANSITION METALS Flashcards
1
Q
Which one possesses maximum number of unpaired electrons:
A
Mn^+2
2
Q
The location of transition elements is in between:
A
s adn p block elements
3
Q
The correct electronic configuration of “Cr” is:
A
[Ar] 3d^4, 4s^1
4
Q
Which pair of elements has abnormal electronic configuration:
A
➡Cr
➡Cu
5
Q
The general electronic configuration of 3d series of transition elements is:
A
[Ar] (n-1)d^1-10 ns^1-2
6
Q
Which of the following is a typical transition metal?
A
Co
7
Q
Correct electronic configuration of Mn:
A
[Ar] 3d^5 4s^2
8
Q
Which of the followings has a complete d-subshell in atomic as well as cationic state:
A
Zn
9
Q
The element which gains electronic configuration of a noble gas at +3 oxidation state:
A
Sc
10
Q
At which oxidation state Cu achieves electronic configuration of Zn^+2:
A
+1
11
Q
Zinc does not show variable oxidation state of the transition metal:
A
[Fe(CO)5]
12
Q
The oxidation state of transition elements is usually:
A
Variable
13
Q
The oxidation number of central metal atom in [Ni(CO)4] is:
A
0
14
Q
In complex compounds, the oxidation number is written in:
A
Roman Number
15
Q
The oxidation number of Mn in [MnO4]^-2:
A
+6
16
Q
The highest oxidation state of manganese is:
A
+7
17
Q
Whcih two pairs show same oxidation state of iron:
A
Fe2(SO4)3, Fe2O3
18
Q
Which of the following shows only +2 oxidation state:
A
Zn
19
Q
Which electronic configuration can have possibility of +7 oxidation state:
A
[Ar]3d^5,4s^2
20
Q
Which has same charge on central metal atom as the co-ordination sphere:
A
[Cu(NH3)4]SO4
21
Q
Which transition metals serves as catalyst for oxidation of alkanes:
A
Cu
22
Q
Catalyst used for ammonia synthesis is:
A
Fe
23
Q
TiCl4 is used as catalyst for manufacture of:
A
Plastics
24
Q
Which of the following compound is expected to be colored:
A
CuF2
25
The colour of transition metal complexes is due to:
d-d transitions of electrons
26
Which of the following transition metal forms colourless compounds:
Zn
27
Sc+3 has 3d0 configuration, its colour will be:
Colourless
28
Number of electrons involved in d-d transition of [Ti(H2O]+3
1
29
Ti+3 shows minimum absorption (maximum transmittance) at _____ P ____ wavelength.
➡Red
| ➡Blue
30
d-d transition cannot be shown by:
➡Cu+1
➡Zn+2
➡Sc+3
31
The algebraic sum of the charges present on the central atom ion and the total charge on the ligands is called:
Charge on coordination sphere
32
While assigining the name of a complex compounds, the correct order is:
Cation, Coordination Sphere, Anion
33
THe ability of transition elements to form complexes is due to:
Availability of empty d-orbitals
34
When K4[Fe(CN)6} is dissolved in a solution o salt, then it produces:
➡Complex Ions
| ➡Simple Ions
35
During the formaton of complex compound the ligands bind with central metal ion/atom by:
Co-ordinate Covalent Bond
36
Which one complex is more stable?
[Pt(C2O4)2]-2
| Stable compounds due to ring structures
37
What is the nature of co-ordinatin sphere:
➡Anionic in Nature
➡Cationic in Nature
➡Neutral in Nature
38
The geometry of [Fe(CO)5] is:
Bi-pyramidal
39
When light is exposed to transition element, then electrons jump from lower orbitals to higher orbitals in:
Orbitals of 3-subshell
40
WHich o the ollowing has more unpaired electrons:
Cr
41
The total number of transition elements are?
48
42
Paramagnetic behaviour of transition elements is due to presence of:
Unpaired electrons
43
f-block elements are called:
Inner Transition
44
Hardness of transition metals is due to_-?
Higher Binding Energies
45
Melting and boiling point of transition elements is due to:
➡Higher Binding Energies
➡Strong Metallic Bonding
➡Hardness
46
Colour of Sc3 is:
No Color
47
Oxidation number of central metal is represented in:
Roman
48
Coinage metals belong to:
IB
49
Which transition metal is mostly used in industry.
Fe
50
The maxmium oxidation state gained by Mn is:
7
51
When iron got rusted on sea then surface contain:
Iron Oxides
52
Oxalato form a ____- atom ring.
5
53
The oxidation number of transiiton element when d-orbital is involved in bonding:
➡3
| ➡4
54
All transition elements show oxidation state:
2
55
[PtCl(NO)2(NH3)4] , nature of ligands
2
56
The series of transition elements after lanthanum is known as:
Lanthanides
57
f-block elements are present in of the periodic table:
Bottom of the periodic table
58
Which oxidation state give evidence of d-orbitals:
➡+2
➡+3
➡+4
59
Metal along with ligands form:
Coordination Sphere
60
[PtCl(H2O)3(NH3)4], nature of ligands:
2
61
The series of transition elements after lanthanum is known as
Lanthanides
62
f-block elements are present in of the periodic table:
Bottom of the periodic table
63
Which oxidation state give evidence of d-orbitals:
➡+2
➡+3
➡+4
64
Metal along with ligands form;
Coordination Sphere
65
[PtCl(H2O)3(NH3)4] has structure:
Octahedral
66
The elements having partially filled d-orbitals and f-orbitals are called as;
➡Transition Elements
➡d-Block Elements
➡f-Block Elements
67
d-Block elements are also called as:
Outer transition elements
68
Which one of the following is an example of transition element?
Co
69
The colour of [Ti(H2O)6]+3 is:
Violet
70
In transition element ater lanthanm what start next?
Lanthanides
71
Number of electrons in outermost shell of Scadium:
2
72
Transition elements show colour becuase of:
d-d Transition
73
Transition metals forms alloys due to;
Large Size
74
Types of ligand in [PtCl(NO2)(NH3)]
3
75
With impurities like P and S, the open hearth furnace is lined with:
➡CaO
| ➡MgO
76
The transition elements belong to group VIB are:
➡Cr
➡Mo
➡W
77
Important transiiton element is:
Fe
78
Color emitted by [Ti(H2O)6]+3
Violet
79
The most importnat tranistion metal is:
Fe
80
In K4[Fe(CN)6], the no. of ligands is:
6
81
Complex compounds have:
➡Complex Molecule
➡Complex Ions capable of independent existence
➡Carination sphere enclosing ligand and central metal
82
Oxalate ion is not considered as
Monodentate Ligand
83
The paramagnetic character of substances is due to the presence of:
Unpaired electrons in the atom or molecule
84
Which pair of transition elements shows abnormal electronic configuration?
➡Cu
| ➡Cr
85
Electronic configuration of Gold [Au]79 is:
[Xe] 4f^14, 5d^10, 6s^1
86
The anamolus electronic configuration shown by chromium and copper among 3-d series of elements is due to:
Stability associated with this configuration
87
Which element of 3-d series of periodic table shows the electronic configuration of 3d^8, 4s^2?
Nickel
88
Scandium has atomic number 21; which one will be its electronic configuration?
Atomic Number 21
89
Which of the following is the electronic configuration of Cr?
[Ar] 3d^5, 4s^1
90
Copper is a typical transition metal. Its atomic number is 29. In which oxidation state does it have partially filled orbital in d-subshell?
Cu+2
91
Valence electronic configuration Cu+2:
3d^9
92
The total number of transition element is:
58
93
Oxidation state of 'Mn' in KMnO4, K2MnO4, MnO2 and MnSO4 is in the order.
+7, +6, +4, +2
94
Which one pair has the same oxidation state of 'Fe'?
➡FeSO4
| ➡FeCl2
95
Idenity the element that has maximum oxidation states:
Manganese
96
The geometry of complexes depends upon type of ___ taking place in the valence shell of central metal atom;
Hybridization
97
Chelates are _____ than ordinary complexes.
More stable
98
Oxidation state of 'Fe' in K3[Fe(CN)6] is:
+3
99
Ligands having two lone pair of electrons for donations to the central transition metal ions are known as;
Bidentate Ligand
100
The shape of [Co(NH3)6] is:
Octahedral
101
What are the coordination number of e and Cu in the following compounds K4[Fe(CN)6], [Cu(NH3)]4 SO4 , respectively:
➡+6
| ➡+4
102
[Ti(H2O)6]+3 transmits:
➡Red
| ➡Blue Light
103
Violet colour of [Ti(H2O)6]+3 ion is due to;
Central Metal Ion
104
The color of transition metal complexes is due to transition of electron between
d to d orbitals
105
The octahedral geometry of complexes [Co(NH3)6]+3 has hybridization:
sp3d2
106
In the complex, potassium hexacyanoferrate (III) the coordinaton number of Fe is:
6
107
Co-ordination number of [Co(en)2Cl2] is:
6
108
In 3rd series of transition elements, paramagnetic behaviour is maximum for Mn+2 and:
Cr_3
109
Electronic confiugraion of chrmoium is:
[Ar]3d^5, 4s^1
110
The transition element which doesn't know show variable valency is;
Zn
111
Which of the following is the non-typical transition element:
Zn
| Transition element which have empty or fully filled d-orbital are non-Typical transition element
112
The total no. o transition elements are:
58
113
Coinage metals are present in;
IB
| Cu,Ag,Au
114
Which group elements ususally show single oxidation state?
IIB
115
Generally the transition elements have ___ melting and boiling points.
Very High
116
Which of the following pairs show resemblance in their valence shell configuration:
➡Zn
| ➡Cd
117
The electrons lost by Zn to form ZN+2"
4s electrons
118
The correct electronic configuration of manganese is;
4s2, 3d5
119
Which pair of ions have same number of unpaired electrons in d-subshell.
➡Ti+3
| ➡Cu+2
120
At which state copper has partially filled d-subshell.
Cu+2
121
The transition metal which has colorless compounds:
Sc
122
Which element of 3-d series show maximum oxidation state:
Mn
123
The paramagnetic behavior is the strongest in:
➡Fe+3
| ➡Mn+2
124
The transition metal which has only colorless compounds:
Zn
125
What is the total number of electron pairs received by central metal from ligand in the following complexes is [Cr(C2O4)3]
6
126
The IUPAC name of [CoBr(NH3)4(H2O)](NO3)2
Tetra ammine aqua bromo cobalt (III) nitrate
127
Which is the formula of tetra-ammine chloro-nitro platinum (IV) sulphate:
[Pt(NH3)4(NO2)Cl]SO4
128
The coordination number of Pt in [PtCl(NO2)(NH3)4]+2
6
| Six monodentate ligands are attached to platinum
129
Oxalate is a bidentate ligand and it forms a ____ membered ring with the cation.
Five
130
f-block elements are called:
➡Inner transition
| ➡Lanthanides & Actinides
131
Which group contains the elements with the weakest binding energies:
IIB
132
The number of unpaired electrons present in Cr+3 ion is/are:
3
133
The number of unpaired electrons present in Cr+6 ion is:
0
134
Which one of the following ion has 3d5 subshell arrangement?
Fe+3
135
Cu+2 has electronic configuration:
[Ar] 3d9
136
The binding energy of elements is in the order is:
V > Cr > Fe > Mn
137
One of the following properties of transition elements does not vary with regular pattern:
➡Binding energy
➡Ionic Radius
➡Melting Point and Boiling Point
138
Which of the following compound can show maximum paramagentism:
Fe+3
139
Ti+3 salts are purple coloured, what is the colour of Ti+4 salts:
Colourless
140
Which of the following element ususally not show variable oxidation state:
Zn
141
The common oxidation state of first transition series of elements:
+2
142
Which of the following ion show color in aqueous solution:
Fe+3
143
The complex of which ion is colourless:
Ti+4
144
Which one of the 3d series element is not ususally used as a catalyst:
Scandium
145
Ethylenediaminetetraacetate (EDTA) is a:
Polydentate Ligand
146
Ethylenediamine is a:
Bidentate Ligand
147
Which is bidentate neutral ligand?
Hydrazine
148
In which complex ligand makes ring like structure:
[Pt(C2O4)2]-2
149
The name of Na4[Fe(Cn)6] according to IUAC system is:
Sodium hexacyano ferrate (III)
150
Which of the following has the neutral coordination sphere:
[Ni(CO)4]
151
Metal chelates are ___ stable than metal complexes.
More
152
The coordination number of Cu in [Cu(NH3)4]SO4 is;
4
153
In square planar complexes the central metal atom is ___ hybridized.
dsp2
154
Co-ordination numebr and oxidation state of Cr in [Cr(OH)3(H2O)3]
➡6
| ➡+3
