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CHEMISTRY > UNIT#12 TRANSITION METALS > Flashcards

UNIT#12 TRANSITION METALS Flashcards

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1
Q

Which one possesses maximum number of unpaired electrons:

A

Mn^+2

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2
Q

The location of transition elements is in between:

A

s adn p block elements

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3
Q

The correct electronic configuration of “Cr” is:

A

[Ar] 3d^4, 4s^1

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4
Q

Which pair of elements has abnormal electronic configuration:

A

➡Cr

➡Cu

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5
Q

The general electronic configuration of 3d series of transition elements is:

A

[Ar] (n-1)d^1-10 ns^1-2

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6
Q

Which of the following is a typical transition metal?

A

Co

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7
Q

Correct electronic configuration of Mn:

A

[Ar] 3d^5 4s^2

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8
Q

Which of the followings has a complete d-subshell in atomic as well as cationic state:

A

Zn

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9
Q

The element which gains electronic configuration of a noble gas at +3 oxidation state:

A

Sc

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10
Q

At which oxidation state Cu achieves electronic configuration of Zn^+2:

A

+1

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11
Q

Zinc does not show variable oxidation state of the transition metal:

A

[Fe(CO)5]

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12
Q

The oxidation state of transition elements is usually:

A

Variable

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13
Q

The oxidation number of central metal atom in [Ni(CO)4] is:

A

0

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14
Q

In complex compounds, the oxidation number is written in:

A

Roman Number

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15
Q

The oxidation number of Mn in [MnO4]^-2:

A

+6

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16
Q

The highest oxidation state of manganese is:

A

+7

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17
Q

Whcih two pairs show same oxidation state of iron:

A

Fe2(SO4)3, Fe2O3

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18
Q

Which of the following shows only +2 oxidation state:

A

Zn

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19
Q

Which electronic configuration can have possibility of +7 oxidation state:

A

[Ar]3d^5,4s^2

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20
Q

Which has same charge on central metal atom as the co-ordination sphere:

A

[Cu(NH3)4]SO4

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21
Q

Which transition metals serves as catalyst for oxidation of alkanes:

A

Cu

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22
Q

Catalyst used for ammonia synthesis is:

A

Fe

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23
Q

TiCl4 is used as catalyst for manufacture of:

A

Plastics

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24
Q

Which of the following compound is expected to be colored:

A

CuF2

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25
Q

The colour of transition metal complexes is due to:

A

d-d transitions of electrons

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26
Q

Which of the following transition metal forms colourless compounds:

A

Zn

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27
Q

Sc+3 has 3d0 configuration, its colour will be:

A

Colourless

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28
Q

Number of electrons involved in d-d transition of [Ti(H2O]+3

A

1

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29
Q

Ti+3 shows minimum absorption (maximum transmittance) at _____ P ____ wavelength.

A

➡Red

➡Blue

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30
Q

d-d transition cannot be shown by:

A

➡Cu+1
➡Zn+2
➡Sc+3

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31
Q

The algebraic sum of the charges present on the central atom ion and the total charge on the ligands is called:

A

Charge on coordination sphere

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32
Q

While assigining the name of a complex compounds, the correct order is:

A

Cation, Coordination Sphere, Anion

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33
Q

THe ability of transition elements to form complexes is due to:

A

Availability of empty d-orbitals

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34
Q

When K4[Fe(CN)6} is dissolved in a solution o salt, then it produces:

A

➡Complex Ions

➡Simple Ions

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35
Q

During the formaton of complex compound the ligands bind with central metal ion/atom by:

A

Co-ordinate Covalent Bond

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36
Q

Which one complex is more stable?

A

[Pt(C2O4)2]-2

Stable compounds due to ring structures

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37
Q

What is the nature of co-ordinatin sphere:

A

➡Anionic in Nature
➡Cationic in Nature
➡Neutral in Nature

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38
Q

The geometry of [Fe(CO)5] is:

A

Bi-pyramidal

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39
Q

When light is exposed to transition element, then electrons jump from lower orbitals to higher orbitals in:

A

Orbitals of 3-subshell

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40
Q

WHich o the ollowing has more unpaired electrons:

A

Cr

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41
Q

The total number of transition elements are?

A

48

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42
Q

Paramagnetic behaviour of transition elements is due to presence of:

A

Unpaired electrons

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43
Q

f-block elements are called:

A

Inner Transition

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44
Q

Hardness of transition metals is due to_-?

A

Higher Binding Energies

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45
Q

Melting and boiling point of transition elements is due to:

A

➡Higher Binding Energies
➡Strong Metallic Bonding
➡Hardness

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46
Q

Colour of Sc3 is:

A

No Color

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47
Q

Oxidation number of central metal is represented in:

A

Roman

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48
Q

Coinage metals belong to:

A

IB

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49
Q

Which transition metal is mostly used in industry.

A

Fe

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50
Q

The maxmium oxidation state gained by Mn is:

A

7

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51
Q

When iron got rusted on sea then surface contain:

A

Iron Oxides

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52
Q

Oxalato form a ____- atom ring.

A

5

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53
Q

The oxidation number of transiiton element when d-orbital is involved in bonding:

A

➡3

➡4

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54
Q

All transition elements show oxidation state:

A

2

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55
Q

[PtCl(NO)2(NH3)4] , nature of ligands

A

2

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56
Q

The series of transition elements after lanthanum is known as:

A

Lanthanides

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57
Q

f-block elements are present in of the periodic table:

A

Bottom of the periodic table

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58
Q

Which oxidation state give evidence of d-orbitals:

A

➡+2
➡+3
➡+4

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59
Q

Metal along with ligands form:

A

Coordination Sphere

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60
Q

[PtCl(H2O)3(NH3)4], nature of ligands:

A

2

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61
Q

The series of transition elements after lanthanum is known as:

A

Lanthanides

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62
Q

f-block elements are present in of the periodic table:

A

Bottom of the periodic table

63
Q

Which oxidation state give evidence of d-orbitals:

A

➡+2
➡+3
➡+4

64
Q

Metal along with ligands form;

A

Coordination Sphere

65
Q

[PtCl(H2O)3(NH3)4] has structure:

A

Octahedral

66
Q

The elements having partially filled d-orbitals and f-orbitals are called as;

A

➡Transition Elements
➡d-Block Elements
➡f-Block Elements

67
Q

d-Block elements are also called as:

A

Outer transition elements

68
Q

Which one of the following is an example of transition element?

A

Co

69
Q

The colour of [Ti(H2O)6]+3 is:

A

Violet

70
Q

In transition element ater lanthanm what start next?

A

Lanthanides

71
Q

Number of electrons in outermost shell of Scadium:

A

2

72
Q

Transition elements show colour becuase of:

A

d-d Transition

73
Q

Transition metals forms alloys due to;

A

Large Size

74
Q

Types of ligand in [PtCl(NO2)(NH3)]

A

3

75
Q

With impurities like P and S, the open hearth furnace is lined with:

A

➡CaO

➡MgO

76
Q

The transition elements belong to group VIB are:

A

➡Cr
➡Mo
➡W

77
Q

Important transiiton element is:

A

Fe

78
Q

Color emitted by [Ti(H2O)6]+3

A

Violet

79
Q

The most importnat tranistion metal is:

A

Fe

80
Q

In K4[Fe(CN)6], the no. of ligands is:

A

6

81
Q

Complex compounds have:

A

➡Complex Molecule
➡Complex Ions capable of independent existence
➡Carination sphere enclosing ligand and central metal

82
Q

Oxalate ion is not considered as

A

Monodentate Ligand

83
Q

The paramagnetic character of substances is due to the presence of:

A

Unpaired electrons in the atom or molecule

84
Q

Which pair of transition elements shows abnormal electronic configuration?

A

➡Cu

➡Cr

85
Q

Electronic configuration of Gold [Au]79 is:

A

[Xe] 4f^14, 5d^10, 6s^1

86
Q

The anamolus electronic configuration shown by chromium and copper among 3-d series of elements is due to:

A

Stability associated with this configuration

87
Q

Which element of 3-d series of periodic table shows the electronic configuration of 3d^8, 4s^2?

A

Nickel

88
Q

Scandium has atomic number 21; which one will be its electronic configuration?

A

Atomic Number 21

89
Q

Which of the following is the electronic configuration of Cr?

A

[Ar] 3d^5, 4s^1

90
Q

Copper is a typical transition metal. Its atomic number is 29. In which oxidation state does it have partially filled orbital in d-subshell?

A

Cu+2

91
Q

Valence electronic configuration Cu+2:

A

3d^9

92
Q

The total number of transition element is:

A

58

93
Q

Oxidation state of ‘Mn’ in KMnO4, K2MnO4, MnO2 and MnSO4 is in the order.

A

+7, +6, +4, +2

94
Q

Which one pair has the same oxidation state of ‘Fe’?

A

➡FeSO4

➡FeCl2

95
Q

Idenity the element that has maximum oxidation states:

A

Manganese

96
Q

The geometry of complexes depends upon type of ___ taking place in the valence shell of central metal atom;

A

Hybridization

97
Q

Chelates are _____ than ordinary complexes.

A

More stable

98
Q

Oxidation state of ‘Fe’ in K3[Fe(CN)6] is:

A

+3

99
Q

Ligands having two lone pair of electrons for donations to the central transition metal ions are known as;

A

Bidentate Ligand

100
Q

The shape of [Co(NH3)6] is:

A

Octahedral

101
Q

What are the coordination number of e and Cu in the following compounds K4[Fe(CN)6], [Cu(NH3)]4 SO4 , respectively:

A

➡+6

➡+4

102
Q

[Ti(H2O)6]+3 transmits:

A

➡Red

➡Blue Light

103
Q

Violet colour of [Ti(H2O)6]+3 ion is due to;

A

Central Metal Ion

104
Q

The color of transition metal complexes is due to transition of electron between

A

d to d orbitals

105
Q

The octahedral geometry of complexes [Co(NH3)6]+3 has hybridization:

A

sp3d2

106
Q

In the complex, potassium hexacyanoferrate (III) the coordinaton number of Fe is:

A

6

107
Q

Co-ordination number of [Co(en)2Cl2] is:

A

6

108
Q

In 3rd series of transition elements, paramagnetic behaviour is maximum for Mn+2 and:

A

Cr_3

109
Q

Electronic confiugraion of chrmoium is:

A

[Ar]3d^5, 4s^1

110
Q

The transition element which doesn’t know show variable valency is;

A

Zn

111
Q

Which of the following is the non-typical transition element:

A

Zn

Transition element which have empty or fully filled d-orbital are non-Typical transition element

112
Q

The total no. o transition elements are:

A

58

113
Q

Coinage metals are present in;

A

IB

Cu,Ag,Au

114
Q

Which group elements ususally show single oxidation state?

A

IIB

115
Q

Generally the transition elements have ___ melting and boiling points.

A

Very High

116
Q

Which of the following pairs show resemblance in their valence shell configuration:

A

➡Zn

➡Cd

117
Q

The electrons lost by Zn to form ZN+2”

A

4s electrons

118
Q

The correct electronic configuration of manganese is;

A

4s2, 3d5

119
Q

Which pair of ions have same number of unpaired electrons in d-subshell.

A

➡Ti+3

➡Cu+2

120
Q

At which state copper has partially filled d-subshell.

A

Cu+2

121
Q

The transition metal which has colorless compounds:

A

Sc

122
Q

Which element of 3-d series show maximum oxidation state:

A

Mn

123
Q

The paramagnetic behavior is the strongest in:

A

➡Fe+3

➡Mn+2

124
Q

The transition metal which has only colorless compounds:

A

Zn

125
Q

What is the total number of electron pairs received by central metal from ligand in the following complexes is [Cr(C2O4)3]

A

6

126
Q

The IUPAC name of CoBr(NH3)4(H2O)2

A

Tetra ammine aqua bromo cobalt (III) nitrate

127
Q

Which is the formula of tetra-ammine chloro-nitro platinum (IV) sulphate:

A

[Pt(NH3)4(NO2)Cl]SO4

128
Q

The coordination number of Pt in [PtCl(NO2)(NH3)4]+2

A

6

Six monodentate ligands are attached to platinum

129
Q

Oxalate is a bidentate ligand and it forms a ____ membered ring with the cation.

A

Five

130
Q

f-block elements are called:

A

➡Inner transition

➡Lanthanides & Actinides

131
Q

Which group contains the elements with the weakest binding energies:

A

IIB

132
Q

The number of unpaired electrons present in Cr+3 ion is/are:

A

3

133
Q

The number of unpaired electrons present in Cr+6 ion is:

A

0

134
Q

Which one of the following ion has 3d5 subshell arrangement?

A

Fe+3

135
Q

Cu+2 has electronic configuration:

A

[Ar] 3d9

136
Q

The binding energy of elements is in the order is:

A

V > Cr > Fe > Mn

137
Q

One of the following properties of transition elements does not vary with regular pattern:

A

➡Binding energy
➡Ionic Radius
➡Melting Point and Boiling Point

138
Q

Which of the following compound can show maximum paramagentism:

A

Fe+3

139
Q

Ti+3 salts are purple coloured, what is the colour of Ti+4 salts:

A

Colourless

140
Q

Which of the following element ususally not show variable oxidation state:

A

Zn

141
Q

The common oxidation state of first transition series of elements:

A

+2

142
Q

Which of the following ion show color in aqueous solution:

A

Fe+3

143
Q

The complex of which ion is colourless:

A

Ti+4

144
Q

Which one of the 3d series element is not ususally used as a catalyst:

A

Scandium

145
Q

Ethylenediaminetetraacetate (EDTA) is a:

A

Polydentate Ligand

146
Q

Ethylenediamine is a:

A

Bidentate Ligand

147
Q

Which is bidentate neutral ligand?

A

Hydrazine

148
Q

In which complex ligand makes ring like structure:

A

[Pt(C2O4)2]-2

149
Q

The name of Na4[Fe(Cn)6] according to IUAC system is:

A

Sodium hexacyano ferrate (III)

150
Q

Which of the following has the neutral coordination sphere:

A

[Ni(CO)4]

151
Q

Metal chelates are ___ stable than metal complexes.

A

More

152
Q

The coordination number of Cu in [Cu(NH3)4]SO4 is;

A

4

153
Q

In square planar complexes the central metal atom is ___ hybridized.

A

dsp2

154
Q

Co-ordination numebr and oxidation state of Cr in [Cr(OH)3(H2O)3]

A

➡6

➡+3

CHEMISTRY (19 decks)

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