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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
`(I) K_(3)[Co(CN)_(6)]+[Cr(NH_(3))_(6)]Cl_(3)overset("acetone ")tox+3KCldarr``K_(3)[Cr(CN)_(6)]+[Co(NH_(3))_(6)]Cloverset("Acetone")toy+3KCldarr` the solution was filted x and y are obtained after evoporation of the solvent from the filtrate. `X and y areA. Linkage isomersB. Geometrical isomerismC. Coordinaate IsomersD. Positinal IsoMers. |
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Answer» Correct Answer - c `x: [Cr (NH_(3))_(6)][Co(CN)_(6)] : y [Co(NH_(3))_(6)][Cr(CN)_(6)]` |
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| 52. |
Identify the geometrical isomers of the following: A. I with IIIB. II with IVC. I with II and IVD. none of these |
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Answer» Correct Answer - C They differ in configuration. |
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| 53. |
which of the following is /are correct relations(s)?A. `Delta_(0)=(4)/(9)Delta_(t)`B. `Delta_(t)=(4)/(9)Delta_(0)`C. `Delta_(s)=1.3Delta_(0)`D. `Delta_(t)=(3)/(7)Delta_(0)` |
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Answer» Correct Answer - b,c `Delta_(t) = (2)/(3) xx (2)/(3) = (4)/(9) Delta_(0)` |
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| 54. |
Which of the following is not optically active?A. `[Co(en)_(3)]^(3+)`B. `[Cr(o x)_(3)]^(3-)`C. `cis-[CoCl_(2)(en)_(2)]^(+)`D. `trans-[CoCl_(2)(en)_(2)]^(+)` |
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Answer» Correct Answer - 4 Trans complex has symmetry and so not optical active. |
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| 55. |
Which of the following is not optically active?A. `[Co(en)_(3)]^(3+)`B. `[Cr(o x)_(3)]^(3-)`C. `cis-[CoCl_(2)(en)_(2)]^(+)`D. trans-`[CoCl_(2)(en)_(2)]^(+)` |
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Answer» Correct Answer - D Generally square planar and octahedral complexes exhibit geometrical isomerism |
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| 56. |
Which of the following ions are optically active? A. I onlyB. II onlyC. II and IIID. IV only |
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Answer» Correct Answer - C II & III are chiral molecules. |
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| 57. |
Which is (are) correct statement (s) ?A. `[Ag(NH_(3)_(2)]^(+)`is linear with sp hybridsed `AG^(+)`ionsB. `NiCl_(4)^(2-),CrO_(4)^(2-)and MnO_(4)^(-)` have tetrahedral geometryC. `[Cu(NH_(3))_(4)]^(2+)`,`[pt(NH_(3))_(4)]^(2+) and [Ni(CN)_(4)]^(2-)` have `dsp^(2)` hybridisatioj of the metal ionD. `Fe(CO)_(5)`has trigonal bipyramidal struure with `D_(Z^(2))Sp^(3)` hydridesed ion |
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Answer» Correct Answer - a,b,c,d Apply Pauling VB theory . See the structures . |
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| 58. |
The effective atomic number of iron in `[Fe(CN)_(6)]^(3-)` isA. `34`B. `36`C. `37`D. `35` |
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Answer» Correct Answer - 4 EAN = [Z-oxidation number of central ion `+2x` number of ligands] `= 26 - 3 + 2xx6 = 35` |
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| 59. |
which of the following exhibits optical activity?A. `Cis-[Co(en)_(2)Cl_(2)]^(+)`B. `Trans-[Co(en)_(2)Cl_(2)]^(+)`C. `K_(3)[Al(C_(2)O_(4))_(3)]`D. `[Co(NH_(3))_(4)Cl_(2)]^(+)` |
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Answer» Correct Answer - a,c B and D have symmetry . |
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| 60. |
The optically active complex areA. `[As(CH_(3))(Cl)(Br)(I)]^(+)`B. `[Pt(NH_(3))(Py)(Cl)(Br)]`C. `[Pt(gly)_(2)]`D. `[Cr(en)_(3)]Cl_(3)` |
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Answer» Correct Answer - a,d A is tetrahedral , D is unsymmetrical , B and C are square planar and not optically active . |
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| 61. |
Select correct statement(s) regarding given complexes:A. `[Fe(CO)_(5)]` the orbitals used for hybridix=zation in Fe atom are s, `Px,Py,Pz,d_(z^(2)`B. `[Pt(NH_(3))_(2)Cl]` the orbital used for hydrization on pt atom are s,Px,Py,`d_(x^(2)-y^(2))` and it is low spin complexC. `[Cr(H_(2)O)_(6)]^(3+)` the orbitals used for hybridiztion in cr atom are s `P_(x)P_(y),P_(z),D_(z^(2)),D_(x^(2)-y^(2))` and it si high spain complexD. `Ni(CO_(4)`the orbitals used for hybrization in Ni atom s `P_(X),P_(y),P_(z)` and it low spin complex |
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Answer» Correct Answer - a,b,c,d All are correct statements. |
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| 62. |
Which of the following compound has/have effective atomic number equal to the atomic number of a noble gas ?A. `K[Co(CO)_(4)]`B. `K_(2)[Fe(CO)_(4)]`C. `[Co(NH_(3))_(6)]Cl_(2)`D. `[CoCl_(3)(H_(2)O)_(3)]` |
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Answer» Correct Answer - a,b,d In (C) , `25 + 12 = 37` . Does not obey EAN rule . |
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| 63. |
Complex compound `[Co(SCN)_(2)(NH_(3))_(4)]Cl` exhibits:A. ionzation isomerismB. Geometrical isomerismC. optical isomerismD. Linkage isomerism |
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Answer» Correct Answer - a,b,d Due to plane of symmetry , the complex is not optical active . |
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| 64. |
Potassium ferrocyanide is aA. Complex saltsB. Normal saltsC. Double saltsD. Basic salts |
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Answer» Correct Answer - 1 `K_(4)[Fe(CN)_(6)]` does not lose its identity in solution. |
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| 65. |
EDTA is used for the estimation ofA. `Na^(+)` and `K^(+)` ionsB. `Cl^(-)` and `Br^(-)` ionsC. `Cu^(2+)` and `Ag^(+)` ionsD. `Ca^(2+)` and `Mg^(2+)` ions |
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Answer» Correct Answer - 4 `Ca^(+2)` and `Mg^(+2)` form complexes with EDTA. |
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| 66. |
The number of ions formed form a formula unit of potassium ferricyanide in solution isA. `2`B. `4`C. `5`D. `6` |
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Answer» Correct Answer - 2 `K_(3)[Fe(CN)_(6)] to 3K^(+) + [Fe(CN)_(6)]^(-3) = ` 4 moles |
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| 67. |
How many molecules of benzene `(C_(6) H_(6))` are there in `1 L` of benzene ? Specific gravity of benzene is 0.88. |
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Answer» Correct Answer - 6 bis (`eta^(6)` - benzene) chromium (0) , 6 + 0 = 6 |
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| 68. |
The oxidation number of the d-block metal in Zeises salt is |
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Answer» Correct Answer - 2 `K[PtCl_(3)(C_(2)H_(4))]` |
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| 69. |
Example for a coordination compound isA. `KCl.MgCl_(2).6H_(2)O`B. `K_(2)SO_(4).Al_(2)(SO_(4))_(3).24H_(2)O`C. `CoCl_(3).6NH_(3)`D. `FeSO_(4).(NH_(4))_(2)SO_(4).6H_(2)O` |
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Answer» Correct Answer - 3 `[Co(NH_(3))_(6)]Cl_(3)` |
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| 70. |
The oxidation stat of the metal in Reinecks salt is +x, x is |
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Answer» Correct Answer - 3 `(NH_(4))[Cr(NCS)_(4)(NH_(3))_(2)]` |
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| 71. |
The oxidation number of the metal in the Wilkinson catalyst is `+x`,x is |
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Answer» Correct Answer - 1 `[RhCl(PPh_(3))_(3)]` |
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| 72. |
The oxidation number of metal atom is zero in |
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Answer» Correct Answer - 7 Iron is in `+2` , 4 pyrrole nitrogens and one histidine nitrogen `2 + 4 + 1 = 7`. |
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| 73. |
What is the coordination number of Co in `[Co(NH_(3))_(4)(H_(2)O)Br](NO_(3))_(2)`?A. FTTFB. TTTTC. FTTFD. TTTF |
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Answer» `(C^(**)),S_(1):` Pentamminethiocyanato-N-chrominium (III) tetrachlorozincate (II). Or PenPentamminethiocyanatochrominium (III) tetrachlorozincate (II) `S_(2): In CoSO_(4)`, the oxidation state of Co is i.e. `"["Ar"]"^(18)3d^(7)4s^(0)` electron configuration. It has two unpaired electrons so it is parmagnetic and coloured. `S_(3):"["Co(NH_(3))_(4)(NO_(2))_(2)"]"NO_(3)` `"["Co(NH_(3))_(4)(NO_(2))(NO_(3))"]"NO_(2)` isomerism `S_(3):"["Co(NH_(3))_(4)(NO_(2))_(2)"]"NO_(3)` `"["Co(NH_(3))_(4)(NO_(2))(oNO_(3))"]"NO_(3)` isomerism The complex has cis- and trans isomers. Total isomers=10. `S_(4)`: The bond length C-O in CO itself is 1.128, while the bond length in `"["Fe(CO)_(5)"]"` molecules are `1.15Å` and account of synergic interaction beteween Fe and CO. |
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| 74. |
Double salts are addition compounds which lose their identity in aqueous solution whereas complexes which are also addition compounds do not lose their identity in aqueous solution. The coordination compounds show isomerism and find applications in photography, qualitative analysis, metallurgy, water purification and in the treatment of various diseases . Which of the following statment is incorrect ?A. Alum is a double salt.B. BDTA salt of calcium is used in the treatment of lead poisoning.C. Effective atomic number of the metals in complexes `[Ni(CO)_(4)]` and `[Fe(CN)_(6)]^(4-)` is same.D. Chloridotris (triphenyl phosphine) rhodiuym (I) is effective heterogeneous catalyst for hydrogenation of alkenes. |
| Answer» (D) It is homogeneous catalyst for hydrogenation of alkenes. | |
| 75. |
Match the following |
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Answer» Correct Answer - A-s; B-p; C-p,q,s; D-r `[M(A"A")_(3)]" and "[M(A"A")_(2)ab]` can show optical isomerism. |
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| 76. |
Match the following |
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Answer» Correct Answer - A-p,r,t; B-q,s,t; C-p,s; D-p,r,t Vaskas complex is Trans- `[IrCl(CO)(PPh_(3))_(2)]` |
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| 77. |
Match the following |
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Answer» Correct Answer - A-p; B-q,t; C-p,r,s; D-p,q,r,s B exchanges with anion, C & D exchange with cation. |
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| 78. |
Match the following |
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Answer» Correct Answer - A-p,r,t, B-p,r,t C-q,s, D-q,s Use Pauling VBT. |
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| 79. |
Match the following |
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Answer» Correct Answer - A-p,r, B-p,q, C-r, D-r Use Pauling VBT. |
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| 80. |
Match the following |
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Answer» Correct Answer - A-q, B-p, C-r,s, D-p Use Pauling VBT. |
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| 81. |
STATEMENT-1: All the complexes of Pt `(+squaresquare)` and Au `(+squaresquaresquare)` with strong field as well as with weak field ligands are square planar. STATEMENT-2 : The crystal filed spliting energy is larger for secong and third row transition elements, and for more highly charged species. This large value of crystal field splitting enerfy energetically favours the pairing of electron for square planar geometry.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.B. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explation for statement-1C. Statement-1 is True, Statement-2 is False.D. Statement-1 is False, Statement-2 is True. |
| Answer» Correct Answer - (A) | |
| 82. |
Match the following |
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Answer» Correct Answer - A-q, B-p, C-s, D-r Use Pauling VBT. |
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| 83. |
Which of the following is/are correct?A. Ligands with filled `pi` orbitals are called `pi` donorsB. `pi` donor ligand forms sigma bond with metal `t_(2g)` orbitalC. Ligand to metal charge transfer favoured when the central metal has a high oxidation stateD. Delocalization of `pi` electrons from the ligand to the metal rduces the value of `triangle_(0)` |
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Answer» Correct Answer - a,d (A) is correct answer. (B) is incorrect because `pi` donor ligand form `pi` bond and C is incorrect. (D) is correct answer. |
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| 84. |
Give the stabilization energy of `d^(7)` electrons in presence of strong and weak field ligands. |
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Answer» `SE = [-6xx0.4+1xx0.6]Delta_(0) = -1.8Delta_(0)` Weak field ligands `SE = [-5xx0.4+2xx0.6]Delta_(0) = -0.8Delta_(0)` |
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| 85. |
Match the following |
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Answer» Correct Answer - A-p,q B-p,s C-q, D-q,r Use Pauling VBT. |
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| 86. |
The magnitude of crystal field stabilization energy depends onA. The nature of of ligandsB. The charge on the metals atomC. The charge on the ligandD. Position of metal in periodic table |
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Answer» Correct Answer - a,b,d (A) is correct because strong field ligand cause more splitting. (B) is correct because `triangle_(0)` increases with increasing oxidation number of metal. (C) is incorrect because `triangle_(0)` is independent of charge on ligand. (D) is correct because `triangle_(0)` increases down the group. |
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| 87. |
Both the (X) form and (Y) form showA. linkage isomerismB. Coordination isomerismC. Ionization isomerismD. None of these |
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Answer» Correct Answer - c X has one `Br^(-)` ion outside the co-ordination sphere. Y has `I^(-)` outside the co-ordination sphere. Note AgBr is partially soluble in ammonia whereas AgI is insoluble. |
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| 88. |
Match the following |
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Answer» Correct Answer - A-r, B-q,t, C-p, D-s More the ions produced in aqueous solution larger the conductivity values. |
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| 89. |
A metal complex having composition `[Cr(NH_(3))_(4)Br_(2)I]` was isolated in two forms (X) and (Y). Form (X) reacts with `AgNO_(3)` to give a pale yellow precipitate which is partially soluble in excess of `NH_(4)OH` whereas (Y) gives a greenish yellow precipitate which is insoluble in `NH_(4)OH`.Which of the following statement is true?A. (X)-cis form optically inactive (Y)-cis form optically activeB. (X)-cis form optically inactive (Y)- trans form optically activeC. The cis and trans forms of both X and Y are optically activeD. The cis and trans form of both X and Y are optically inactive. |
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Answer» Correct Answer - d X has one `Br^(-)` ion outside the co-ordination sphere. Y has `I^(-)` outside the co-ordination sphere. Note AgBr is partially soluble in ammonia whereas AgI is insoluble. |
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| 90. |
A metal complex having composition `[Cr(NH_(3))_(4)Br_(2)I]` was isolated in two forms (X) and (Y). Form (X) reacts with `AgNO_(3)` to give a pale yellow precipitate which is partially soluble in excess of `NH_(4)OH` whereas (Y) gives a greenish yellow precipitate which is insoluble in `NH_(4)OH`. what is formula of X and Y?A. The formula of (X) and (Y) are `[Cr(NH_(3))_(4)BrI]Br" and "[Cr(NH_(3))_(3)Br_(2)I]NH_(3)` respectivelyB. The formula of (X) and (Y) are `[Cr(NH_(3))_(4)BrI]Br" & "[Cr(NH_(3))_(4)Br_(2)]I` repectivelyC. The formula of (X) and (Y) are both `[Cr(NH_(3))_(4)I]Br_(2)`D. The formula of (X) and (Y) are `[Cr(NH_(3))_(2)IBr_(2)](NH_(3))_(2)` |
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Answer» Correct Answer - b X has one `Br^(-)` ion outside the co-ordination sphere. Y has `I^(-)` outside the co-ordination sphere. Note AgBr is partially soluble in ammonia whereas AgI is insoluble. |
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| 91. |
The following does not give a precipitate either with `AgNO_(3)` or `BaCL_(2)`A. `[Co(NH_(3))_(5) Cl]SO_(4)`B. `[Co(NH_(3))_(3) Cl_(3)]`C. `[Co(NH_(3))_(4) Cl_(2)]Cl`D. `[Co(NH_(3))_(2) Cl_(4)]Cl` |
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Answer» Correct Answer - 2 Cannot ionise to produce free `Cl^(-)` (or) `SO_(4)^(-2)` |
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| 92. |
Which one of the following has largest number of isomers?A. `[Ru(NH_(3))_(4)Cl_(2)]^(+)`B. `[Co(NH_(3))_(5)Cl]^(2+)`C. `[Ir(PR_(3)P)_(2)H(CO)]^(2+)`D. `[Co(en)_(2)Cl_(2)]^(+)` |
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Answer» Correct Answer - 4 The complex `[Co(en)_(2)Cl_(2)]^(+)` shows geometrical as well as optical isomerism |
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| 93. |
The total number of geometric isomers for Mabcdef are ____________ .A. `4C_(2)`B. `5C_(1)`C. `3C_(2)`D. `6C_(2)` |
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Answer» Correct Answer - d six ligands with two occupying opposite corners of the octahedra `6C_(2)` |
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| 94. |
Which one of the following has largest number of isomers?A. `[Co(en)_(2)Cl_(2)]^(+)`B. `[Co(NH_(3))_(5)Cl]^(2+)`C. `[Ir(PR_(3)P)_(2)H(CO)]^(2+)`D. `[Ru(NH_(3))_(4)Cl_(2)]^(+)` |
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Answer» Correct Answer - A `[Co(en)_(2)Cl_(2)]^(+)` has 3 isomers. (Optical and geometrical) |
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| 95. |
In `Fe(CO)_5`, the `Fe-C` bond possesses:A. `pi`-character onlyB. `sigma` character onlyC. ionic character onlyD. both `sigma` & `pi` character |
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Answer» Correct Answer - 4 due to back bonding both `sigma` and `pi` bonding occurs. |
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| 96. |
Which of the following will show optical isomerism? .A. `[Cu(NH_(3))_(4)]^(2+)`B. `[ZnCl_(4)]^(2-)`C. `[Cr(C_(2)O_(4))_(3)]^(3-)`D. `[Co(CN)_(6)]^(3-)` |
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Answer» Correct Answer - C `[Cr(C_(2)O_(4))_(3)]^(-3)` is chiral complex |
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| 97. |
In `Fe(CO)_5`, the `Fe-C` bond possesses:A. `pi`-character onlyB. Both `sigma` and `pi` charactersC. Ionic charactersD. `sigma`-character only |
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Answer» Correct Answer - B Metal carbonyl consists of `MhArrC` bonds. |
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| 98. |
The correct order of magnetic moments (spin values in B.M.) among is:A. `[Fe(CN)_(6)]^(4-) gt [CoCl_(4)]^(2-) gt [MnCl_(4)]^(2-)`B. `[MnCl_(4)]^(2-) gt Fe(CN)_(6)]^(4-) gt [CoCl_(4)]^(2-)`C. `[Fe(CN)_(6)]^(4-) gt [MnCl_(4)]^(2-) gt [CoCl_(4)]^(2-)`D. `[MnCl_(4)]^(2-) gt [CoCl_(4)]^(2-) gt Fe(CN)_(6)]^(4-)` |
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Answer» Correct Answer - D Magnetic moment depends on number of unpaired electron in the central metal ion. |
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| 99. |
The coordination number of a central metal atom in a complex is determined by:A. The numbe of only anionic ligand bonded to metal ionB. The number of ligands aroumnd a metal ion bounded by pi bondsC. The number of ligands around a metal a ion bonded by sigma and pi bondsD. The number o ligands around a metal ion bonded by sigma bonds |
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Answer» Correct Answer - D Co-ordination number depends on number of `sigma`-bonds around the central metal atom. |
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| 100. |
Co-ordination compounds have great importance in biological systems. In this context, which statements is incorrect?A. Carboxypeptidase - A is an enzyme and contains zincB. Haemoglobin is the red pigment of blood and contains iron.C. Cyanocobalamin is `B_(12)` and contains cobalt.D. Cis platin is used as analgesic. |
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Answer» Correct Answer - D Cis platin is used as anti cancer drug |
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