UNIT#12 TRANSITION METALS Flashcards
Which one possesses maximum number of unpaired electrons:
Mn^+2
The location of transition elements is in between:
s adn p block elements
The correct electronic configuration of “Cr” is:
[Ar] 3d^4, 4s^1
Which pair of elements has abnormal electronic configuration:
➡Cr
➡Cu
The general electronic configuration of 3d series of transition elements is:
[Ar] (n-1)d^1-10 ns^1-2
Which of the following is a typical transition metal?
Co
Correct electronic configuration of Mn:
[Ar] 3d^5 4s^2
Which of the followings has a complete d-subshell in atomic as well as cationic state:
Zn
The element which gains electronic configuration of a noble gas at +3 oxidation state:
Sc
At which oxidation state Cu achieves electronic configuration of Zn^+2:
+1
Zinc does not show variable oxidation state of the transition metal:
[Fe(CO)5]
The oxidation state of transition elements is usually:
Variable
The oxidation number of central metal atom in [Ni(CO)4] is:
0
In complex compounds, the oxidation number is written in:
Roman Number
The oxidation number of Mn in [MnO4]^-2:
+6
The highest oxidation state of manganese is:
+7
Whcih two pairs show same oxidation state of iron:
Fe2(SO4)3, Fe2O3
Which of the following shows only +2 oxidation state:
Zn
Which electronic configuration can have possibility of +7 oxidation state:
[Ar]3d^5,4s^2
Which has same charge on central metal atom as the co-ordination sphere:
[Cu(NH3)4]SO4
Which transition metals serves as catalyst for oxidation of alkanes:
Cu
Catalyst used for ammonia synthesis is:
Fe
TiCl4 is used as catalyst for manufacture of:
Plastics
Which of the following compound is expected to be colored:
CuF2
The colour of transition metal complexes is due to:
d-d transitions of electrons
Which of the following transition metal forms colourless compounds:
Zn
Sc+3 has 3d0 configuration, its colour will be:
Colourless
Number of electrons involved in d-d transition of [Ti(H2O]+3
1
Ti+3 shows minimum absorption (maximum transmittance) at _____ P ____ wavelength.
➡Red
➡Blue
d-d transition cannot be shown by:
➡Cu+1
➡Zn+2
➡Sc+3
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
While assigining the name of a complex compounds, the correct order is:
Cation, Coordination Sphere, Anion
THe ability of transition elements to form complexes is due to:
Availability of empty d-orbitals
When K4[Fe(CN)6} is dissolved in a solution o salt, then it produces:
➡Complex Ions
➡Simple Ions
During the formaton of complex compound the ligands bind with central metal ion/atom by:
Co-ordinate Covalent Bond
Which one complex is more stable?
[Pt(C2O4)2]-2
Stable compounds due to ring structures
What is the nature of co-ordinatin sphere:
➡Anionic in Nature
➡Cationic in Nature
➡Neutral in Nature
The geometry of [Fe(CO)5] is:
Bi-pyramidal
When light is exposed to transition element, then electrons jump from lower orbitals to higher orbitals in:
Orbitals of 3-subshell
WHich o the ollowing has more unpaired electrons:
Cr
The total number of transition elements are?
48
Paramagnetic behaviour of transition elements is due to presence of:
Unpaired electrons
f-block elements are called:
Inner Transition
Hardness of transition metals is due to_-?
Higher Binding Energies
Melting and boiling point of transition elements is due to:
➡Higher Binding Energies
➡Strong Metallic Bonding
➡Hardness
Colour of Sc3 is:
No Color
Oxidation number of central metal is represented in:
Roman
Coinage metals belong to:
IB
Which transition metal is mostly used in industry.
Fe
The maxmium oxidation state gained by Mn is:
7
When iron got rusted on sea then surface contain:
Iron Oxides
Oxalato form a ____- atom ring.
5
The oxidation number of transiiton element when d-orbital is involved in bonding:
➡3
➡4
All transition elements show oxidation state:
2
[PtCl(NO)2(NH3)4] , nature of ligands
2
The series of transition elements after lanthanum is known as:
Lanthanides
f-block elements are present in of the periodic table:
Bottom of the periodic table
Which oxidation state give evidence of d-orbitals:
➡+2
➡+3
➡+4
Metal along with ligands form:
Coordination Sphere
[PtCl(H2O)3(NH3)4], nature of ligands:
2
The series of transition elements after lanthanum is known as
Lanthanides
f-block elements are present in of the periodic table:
Bottom of the periodic table
Which oxidation state give evidence of d-orbitals:
➡+2
➡+3
➡+4
Metal along with ligands form;
Coordination Sphere
[PtCl(H2O)3(NH3)4] has structure:
Octahedral
The elements having partially filled d-orbitals and f-orbitals are called as;
➡Transition Elements
➡d-Block Elements
➡f-Block Elements
d-Block elements are also called as:
Outer transition elements
Which one of the following is an example of transition element?
Co
The colour of [Ti(H2O)6]+3 is:
Violet
In transition element ater lanthanm what start next?
Lanthanides
Number of electrons in outermost shell of Scadium:
2
Transition elements show colour becuase of:
d-d Transition
Transition metals forms alloys due to;
Large Size
Types of ligand in [PtCl(NO2)(NH3)]
3
With impurities like P and S, the open hearth furnace is lined with:
➡CaO
➡MgO
The transition elements belong to group VIB are:
➡Cr
➡Mo
➡W
Important transiiton element is:
Fe
Color emitted by [Ti(H2O)6]+3
Violet
The most importnat tranistion metal is:
Fe
In K4[Fe(CN)6], the no. of ligands is:
6
Complex compounds have:
➡Complex Molecule
➡Complex Ions capable of independent existence
➡Carination sphere enclosing ligand and central metal
Oxalate ion is not considered as
Monodentate Ligand
The paramagnetic character of substances is due to the presence of:
Unpaired electrons in the atom or molecule
Which pair of transition elements shows abnormal electronic configuration?
➡Cu
➡Cr
Electronic configuration of Gold [Au]79 is:
[Xe] 4f^14, 5d^10, 6s^1
The anamolus electronic configuration shown by chromium and copper among 3-d series of elements is due to:
Stability associated with this configuration
Which element of 3-d series of periodic table shows the electronic configuration of 3d^8, 4s^2?
Nickel
Scandium has atomic number 21; which one will be its electronic configuration?
Atomic Number 21
Which of the following is the electronic configuration of Cr?
[Ar] 3d^5, 4s^1
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
Valence electronic configuration Cu+2:
3d^9
The total number of transition element is:
58
Oxidation state of ‘Mn’ in KMnO4, K2MnO4, MnO2 and MnSO4 is in the order.
+7, +6, +4, +2
Which one pair has the same oxidation state of ‘Fe’?
➡FeSO4
➡FeCl2
Idenity the element that has maximum oxidation states:
Manganese
The geometry of complexes depends upon type of ___ taking place in the valence shell of central metal atom;
Hybridization
Chelates are _____ than ordinary complexes.
More stable
Oxidation state of ‘Fe’ in K3[Fe(CN)6] is:
+3
Ligands having two lone pair of electrons for donations to the central transition metal ions are known as;
Bidentate Ligand
The shape of [Co(NH3)6] is:
Octahedral
What are the coordination number of e and Cu in the following compounds K4[Fe(CN)6], [Cu(NH3)]4 SO4 , respectively:
➡+6
➡+4
[Ti(H2O)6]+3 transmits:
➡Red
➡Blue Light
Violet colour of [Ti(H2O)6]+3 ion is due to;
Central Metal Ion
The color of transition metal complexes is due to transition of electron between
d to d orbitals
The octahedral geometry of complexes [Co(NH3)6]+3 has hybridization:
sp3d2
In the complex, potassium hexacyanoferrate (III) the coordinaton number of Fe is:
6
Co-ordination number of [Co(en)2Cl2] is:
6
In 3rd series of transition elements, paramagnetic behaviour is maximum for Mn+2 and:
Cr_3
Electronic confiugraion of chrmoium is:
[Ar]3d^5, 4s^1
The transition element which doesn’t know show variable valency is;
Zn
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
The total no. o transition elements are:
58
Coinage metals are present in;
IB
Cu,Ag,Au
Which group elements ususally show single oxidation state?
IIB
Generally the transition elements have ___ melting and boiling points.
Very High
Which of the following pairs show resemblance in their valence shell configuration:
➡Zn
➡Cd
The electrons lost by Zn to form ZN+2”
4s electrons
The correct electronic configuration of manganese is;
4s2, 3d5
Which pair of ions have same number of unpaired electrons in d-subshell.
➡Ti+3
➡Cu+2
At which state copper has partially filled d-subshell.
Cu+2
The transition metal which has colorless compounds:
Sc
Which element of 3-d series show maximum oxidation state:
Mn
The paramagnetic behavior is the strongest in:
➡Fe+3
➡Mn+2
The transition metal which has only colorless compounds:
Zn
What is the total number of electron pairs received by central metal from ligand in the following complexes is [Cr(C2O4)3]
6
The IUPAC name of CoBr(NH3)4(H2O)2
Tetra ammine aqua bromo cobalt (III) nitrate
Which is the formula of tetra-ammine chloro-nitro platinum (IV) sulphate:
[Pt(NH3)4(NO2)Cl]SO4
The coordination number of Pt in [PtCl(NO2)(NH3)4]+2
6
Six monodentate ligands are attached to platinum
Oxalate is a bidentate ligand and it forms a ____ membered ring with the cation.
Five
f-block elements are called:
➡Inner transition
➡Lanthanides & Actinides
Which group contains the elements with the weakest binding energies:
IIB
The number of unpaired electrons present in Cr+3 ion is/are:
3
The number of unpaired electrons present in Cr+6 ion is:
0
Which one of the following ion has 3d5 subshell arrangement?
Fe+3
Cu+2 has electronic configuration:
[Ar] 3d9
The binding energy of elements is in the order is:
V > Cr > Fe > Mn
One of the following properties of transition elements does not vary with regular pattern:
➡Binding energy
➡Ionic Radius
➡Melting Point and Boiling Point
Which of the following compound can show maximum paramagentism:
Fe+3
Ti+3 salts are purple coloured, what is the colour of Ti+4 salts:
Colourless
Which of the following element ususally not show variable oxidation state:
Zn
The common oxidation state of first transition series of elements:
+2
Which of the following ion show color in aqueous solution:
Fe+3
The complex of which ion is colourless:
Ti+4
Which one of the 3d series element is not ususally used as a catalyst:
Scandium
Ethylenediaminetetraacetate (EDTA) is a:
Polydentate Ligand
Ethylenediamine is a:
Bidentate Ligand
Which is bidentate neutral ligand?
Hydrazine
In which complex ligand makes ring like structure:
[Pt(C2O4)2]-2
The name of Na4[Fe(Cn)6] according to IUAC system is:
Sodium hexacyano ferrate (III)
Which of the following has the neutral coordination sphere:
[Ni(CO)4]
Metal chelates are ___ stable than metal complexes.
More
The coordination number of Cu in [Cu(NH3)4]SO4 is;
4
In square planar complexes the central metal atom is ___ hybridized.
dsp2
Co-ordination numebr and oxidation state of Cr in [Cr(OH)3(H2O)3]
➡6
➡+3
