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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.
| 801. |
Which of the following compounds is not yellow coloured ?A. `K_(3)[Co(NO_(2))_(6)]`B. `(NH_(4))_(3)[As(Mo_(3)O_(10))_(4)]`C. `BaCrO_(4)`D. `Zn_(2)[Fe(CN)_(6)]` |
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Answer» Correct Answer - D Complex `Zn_(2)[Fe(CN)_(6)]` is bluish white while rest are yellow colored compounds. |
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| 802. |
Coordination isomerism is caused by the interchange of ligands between theA. (a) Cis and trans structuresB. (b) Complex cation and complex anionC. (c) Inner sphere and outer sphereD. (d) Low oxidation and higher oxidation states |
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Answer» Correct Answer - A Coordination isomerism is caused by the interchange of ligands between cis and trans structures. |
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| 803. |
`EDTA^(4-)` i9s ethylenediamine tetraacetate ion The total number of `N-CO-O` bond angles in `[Co(EDTA)]^(-1)` complex ion is . |
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Answer» Correct Answer - 8 |
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| 804. |
Other than the X-ray difference , how could be the following pairs of isomers be distinguished from one another by : `[Cr(NH_(3))_(6)][Cr(NO_(2))_(6)] and [Cr(NH_(3))_(4)(NO_(2))_(2)][Cr(NH_(3))_(2)(NO_(2))_(4)]`A. cryoscopic methodB. measurement of molar conductanceC. measuring magnetic momentD. observing their colours. |
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Answer» Correct Answer - B (1) `[Cr(NH_(3))_(6)]^(3+) [Cr(NO_(2))_(6)]^(3-) and [Cr(NH_(3))_(4)(NO_(2))_(2)]^(+)[Cr(NH_(3))_(2)(NO_(2))_(4)]^(-)` have same number of ions, so cryoscopic method can not be used. (2) Molar conductance depends on the number of ions as well as on the charge on the complexes. `[Cr(NH_(3))_(6)]^(3+) [Cr(NO_(2))_(6)]^(3-) and [Cr(NH_(3))_(4)(NO_(2))_(2)]^(+)[Cr(NH_(3))_(2)(NO_(2))_(4)]^(-)` have same number of ions but different electrical charges. (3) Both complexes have same number of unpaired electrons, so mesuring magntic moments methods can not be used. (4) They have similar colour because of the similar conditions. |
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| 805. |
how will you distinguish between the following pairs of isomers `[Cr(NH_(3))_(3)(NO_(2))_(3)]` and `[Cr(NH_(3))_(6)][Cr(NO_(2))_(6)]` |
| Answer» By conductane measurement Its isomer will have nearly zero molar conductane while latter isomer has two ions and will show molar conductane for `2` ions . | |
| 806. |
Which isomerism is exhibited by `[Co(NH_(3))_(6)][Cr(CN)_(6)] and [Cr(NH_(3))_(6)][Co(CN)_(6)]`?A. IonizationB. LinkageC. CoordinationD. Polymerization. |
| Answer» Correct Answer - C | |
| 807. |
How many isomeric forms are possible for the octahedral complex. `[Rh(en)_(2)(NO_(2))(SCN)]^(+)` ? |
| Answer» Correct Answer - 12 | |
| 808. |
Pick out from the following complex compounds, a poor electrolytic conductor in solution?A. (a) `K_2[PtCl_6]`B. (b) `[Co(NH_3)_3(NO_2)_3]`C. (c) `K_4[Fe(CN)_6]`D. (d) `[Co(NH_3)_4]SO_4` |
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Answer» Correct Answer - B `[Co(NH_3)_3(NO_2)_3]` There is no ions out of the coordination sphere thus it is poor conductor in electrolytic solution `K_2[PtCl_6]=3ions` `[Co(NH_3)_3(NO_2)_3]` =out of the coordination sphere no ions (non ionisable) `K_4[Fe(CN)_6]=5ions` `[Co(NH_3)_4].SO_4=2ions` More ions `prop` more conductivity |
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| 809. |
Which of the following is the most likely structure of `CrCl_3*6H_2O`, if `1//3` of total chlorine of the compound is precipitated by adding `AgNO_3` to its aqueous solution:A. (a) `CrCl_3*6H_2O`B. (b) `[Cr(H_2O)_3Cl_3](H_2O)_3`C. (c) `[CrCl_2(H_2O)_4]Cl_2H_2O`D. (d) `[CrCl*(H_2O)_5]Cl_2H_2O` |
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Answer» Correct Answer - C `{:([CrCl_(2)(H_(2)O)_(4)]Cl.2H_(2)O),(" "darrAgNO_(3)),(" "AgCl ppt.):}` Only one chloride ion is present out of coordination sphere. Only those ions that are present out of coordination sphere participate in precipitation. |
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| 810. |
`NiCl_(2) overset(KCN)to "complex"A` `NiCl_(2) underset("excess") overset(KCl)to "complex"B` A & B complexes have the co-ordination number 4. The hybridisation of both complexes are :A. `dsp^(2)`B. `sp^(2) & dsp^(2)`C. `dsp^(2) & sp^(3)`D. both `sp^(3)` |
| Answer» Correct Answer - C | |
| 811. |
Which of the electronic configuration according to crystal field theory of the compound is correct `[MnF_(6)]^(4-)` ? .A. `a. (t_(2g)^(5) e_(g)^(0))`B. `b. (t_(2g)^3 e_(g)^(2))`C. `c. (e_(g)^(1) t_(2g)^(4))`D. `d. (t_(2g)^(1) e_(g)^(4))` |
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Answer» Correct Answer - b Octahedral complex `CN =6` Weak ligand`F^(Θ)` `Mn =3d^(5) 4s^(2) Mn^(2) =3d^(5)` `:.3(t_(2g)e_(g)^(2))` . |
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| 812. |
The number of water molecule(s) directly bonded to the metal centre in `CuSO_(4).5H_(2)O` is-A. 1B. 2C. 3D. 4 |
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Answer» Correct Answer - D The coordination number of Cu in ` [Cu(H_(2)O_(4))_(4)]SO_(4).H_(2)O` is 4. |
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| 813. |
`CuSO_(4).5H_(2)O` is blue in colour while `CuSO_(4)` is colourless. Why ?A. presence of strong field ligand in `CuSO_(4) * 5H_(2)O`B. absence of water (ligand) , `d-d` transitions are not possible in `CuSO_(4)`C. anhydrous `CuSO_(4)` undergoes d-d transitions due to crystal field splittingD. colour is lost due to loss of unpaired electrons . |
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Answer» Correct Answer - A In `CuSO_(4) * 5H_(2)O` water acts as ligand and as a result it causes crystal field splitting making d-d transitions possible in `CuSO_(4) * 5H_(2)O` . Hence , it is coloured . In anhydrous `CuSO_(4)` , due to absence of ligand crystal field splitting is not possible hence no colour is observed . |
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| 814. |
`CuSO_(4).5H_(2)O` is blue in colour while `CuSO_(4)` is colourless. Why ? |
| Answer» In `CuCO_(4). 5H_(2)O` water acts as ligand and causes crystal field splitting. Hence, d-d transition is possible thus `CuSO_(4). 5H_(2)O` is coloured. In the anhydrous `CuSO_(4)` due to the absence of water (ligand), crystal field splitting is not possible and hence, it is colourless. | |
| 815. |
In `CuSO_(4).5H_(2)O` copper is coordinated toA. 5 water moleculesB. 4 water moleculesC. one suophate ionD. one water molecules |
| Answer» (b) Blue vitrol `(CuSO_(4).5H_(2)O]` is a complex compound in which the coordianation number of copper is 4,i.e `CU^(2+)` is attached to 4 water molecules. Hence, it can be corrently written as `[Cu(H_(2)O)_(4)]SO_(4).H_(2)O` | |
| 816. |
In which of the following coordination entites the magnitude of `Delta_(0)` (CFSE in octehedral field) will be maximum. `(At. No .Co = 27)`A. `[Co(C_(2)O_(4))_(3)]^(3-)`B. `[Co(H_(2)O)_(6)]^(3+)`C. `[Co(NH_(3))_(6)]^(2+)`D. `[Co(CN)_(6)]^(3-)` |
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Answer» Correct Answer - D In all the given complex ions, the central metal is Co with the oxidation state `+3` . `Co(3d^(7)4s^(2))implies Co^(3+) (3d^(6))` `d^(6)` configuration will be written as `t_(2g)^(4)e_(g)^(2)` in case of weak field ligands `C_(2)O_(4)^(2-)` , `H_(2)O` and `NH_(3)` but will be written as `t_(2g)^(6)` in case of strong field ligand, `CN^(-)` : CFSE for `t_(2g)^(4)e_(g)^(2)` is (4) `(-2//5Delta_(o)) + (2) (3//5 Delta_(o))` `= - 1.6 Delta_(o) + 1.2 Delta_(o) = -0.4 Delta_(o)` CFSE for `t_(2g)^(6)e_(g)^(0)` is (6) `(-2//5Delta_(o)) = -2.4 Delta_(o)` Thus the magnitude of `Delta_(o)` is maximum for `[Co(CN)_(6)]^(3-)` ion. |
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| 817. |
In which of the following coordination entites the magnitude of `Delta_(0)` (CFSE in octehedral field) will be maximum. `(At. No .Co = 27)`A. `[Co(H_(2)O)_(6)]^(3+)`B. `[Co(NH_(3))_(6)]^(3+)`C. `[Co(CN)_(6)]^(3-)`D. `[Co(C_(2)O_(4))_(3)]^(3-)` |
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Answer» Correct Answer - C As in all the given complex the central metal atom is same and contains same number of d electrons, thus CFSE is decided by ligands. In case of strong field ligand, CFSE is maximum. `CN^(-)` is a strong field ligand, Hence, in `[Co(CN)_(6)]^(3-)` magnitude of CFSE i.e. `Delta_(0)` is maximum. |
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| 818. |
The ionisation isomer of `[Cr(H_(2)O)_(4) Cl (NO_(2))]Cl`A. `[Cr(H_(2)O)_(4) (O_(2)N)]Cl_(2)`B. `[Cr(H_(2)O)_(4) Cl_(2)] (NO_(2))`C. `[Cr (H_(2)O)_(4) Cl (ONO)] Cl`D. `[Cr (H_(2)O)_(4) Cl_(2) (NO_(2))] H_(2)O` |
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Answer» Correct Answer - B |
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| 819. |
The ionisation isomer of `[Cr(H_(2)O)_(4) Cl (NO_(2))]Cl`A. `[Cr(H_(2)O)_(4)(O_(2)N)]Cl_(2)`B. `[Cr(H_(2)O)_(4)Cl_(2)](NO_(2))`C. `[Cr(H_(2)O)_(4)Cl(ONO)]Cl`D. `[Cr(H_(2)O)_(4)Cl_(2)(NO_(2))].H_(2)O` |
| Answer» Correct Answer - B | |
| 820. |
The IUPAC name of `[Co (NH_(3))_(5)ONO]^(2+)` ion isA. pentamminenitrito cobalt (IV ) ionB. pentamminenitro cobalt (III ) ionC. pentamminenitrito cobalt (III ) ionD. pentamminenitro cobalt (IV ) ion |
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Answer» Correct Answer - C `[Co(NH_(3))_(5)ONO]^(2+)` pentaamminenitritocobalt (III) ion . |
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| 821. |
Which complex gives three chloride ions per formula unit ?A. `CrCl_(3) /6H_(2)O`B. `CrCl_(2)/5H_(2 ) O`C. `CrCl_(3).4H_(2)O`D. All of these |
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Answer» Correct Answer - A `[Cr(H_(2)O)_(6)Cl_(2)hArr [Cr(H_(2)O)_(6)]^(3+)+3Cl^(-)` ` CN of Cr =6` |
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| 822. |
The ionisation isomer of `[Cr(H_(2)O)_(4) Cl (NO_(2))]Cl`A. `[Cr (H_(2)O)_(4)(O_(2)N)]Cl_(2)`B. `Cr(H_(2)O)_(4)Cl_(2)]NO_(2)`C. `[Cr(H_(2)O)_(4)Cl(ONO)]Cl`D. `[Cr(H_(2)O)_(4)Cl_(2)(NO_(2))].H_(2)O` |
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Answer» Correct Answer - B The ionisation isomer of `[ Cr(H_(2)O)_(4)Cl(NO_(2))]Cl` is `[Cr(H_(2)O)_(4)Cl_(2)NO_(2)` because of excharging of ligand and counter ions. |
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| 823. |
Which of the following complex species is not expected to exhibit optical isomerism ?A. `[Co (en)_(3)]^(3+)`B. `[Co(en)_(2)Cl_(2)]^(+)`C. `[Co(NH_(3))_(3)CL_(3)]`D. `[Co(en)(NH_(3))Cl_(2)]^(+)` |
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Answer» Correct Answer - C Optical isomerism is exhibited by only those complexes which lacks elements of symmetry `[Co(NH_(3))_(3)CL_(3)]` shows facial as well as meridional isomerism But both the forms contain plane of symmetry thus , this complex does not exhibit optical isomerism |
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| 824. |
The common features among the species ` CN^- , CO ` and ` NO^+` are :A. bond order three ans isoelectronicB. bond order three and weak field ligandsC. isoelectronic and weak field ligandsD. bond order two and pi acceptors. |
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Answer» Correct Answer - A Each species has 14 electrons and bond order for each is three . |
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| 825. |
Assertion Number of unpaired electrons present in `[Cu(NH_(3))(2)]^(o+)` complex is zero Reason The complex is linear with sp-hybrisation .A. If both `(A)` and ` (R )` are correct and `(R )` is the correct explanation of `(A ) ` .B. If both `(A)` and ` (R )` are correct and `(R )` is the correct explanation of `(A ) ` .C. If`(A)` is correct, but `( R )` is incorrect .D. Both `(A)` and `(R ) ` are incorrect . |
| Answer» Correct Answer - B | |
| 826. |
Which of the following complex species is not expected to exhibit optical isomerism ?A. `[Co(en) (NH_(3))_(2) Cl_(2)]^(+)`B. `[Co(en)_(3)]^(3+)`C. `[Co(en)_(2) Cl_(2)]^(+)`D. `[Co(NH_(3))_(3)Cl_(3)]` |
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Answer» Correct Answer - D `[Co(NH_(3))_(3) Cl_(3)]` will not exhibit optical isomerism due to presence of plane of symmetry . |
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| 827. |
Which of the following will not show geometrical isomerism ?A. `[Cr(NH_(3))_(4) Cl_(2)]Cl`B. `[Co(en)_(2) Cl_(2) ] Cl`C. `[Co(NH_(3))_(5) NO_(2)]Cl_(2)`D. `[Pt(NH_(3))_(2) Cl_(2)` |
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Answer» Correct Answer - C Octahedral complex of type `[MA_(5) B]` cannot show geometrical isomerism . |
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| 828. |
Dimethylglyoxime is coordinated to `Ni^(2+)` through .A. Two oxgen atomsB. Two nitrogen atomsC. Two oxygen and one nitrogen atomsD. Two oxygen and one nitrogen atoms |
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Answer» Correct Answer - B Refer to Section 7 .17 point 3 (i) |
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| 829. |
Which of the following is not a neutral ligand ?A. `H_2O`B. `NH_3`C. `ONO`D. `CO` |
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Answer» Correct Answer - C ONO is an anionic ligand `(ONO^(-))` . |
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| 830. |
Find out the number of hydrogen bonds present in the structure of the nickel dimethylglyoxime complex . |
| Answer» Correct Answer - 2 | |
| 831. |
A ligand is termed as monodentate, didentate etc, depending upon the__________ present in it . |
| Answer» Correct Answer - Number,coordination sites | |
| 832. |
Colourless tetrahedral complexes among the following areA. a.`K_(3)[Cu(CN)_(4)]`B. b.`Ca[NiCI_(4)]`C. c.`Na[BF_(4)]`D. d.`Ni(CO)_(4)` |
| Answer» Correct Answer - A::C::D | |
| 833. |
The coordination number of a central metal atom in a complex(s) is//are not determined byA. a.The number of anionic ligands bonded to the metal ionB. b.The number of ligands around metal ion bonded by pi-bondsC. c.The number of ligands around a metal ion bonded by both pi and o-bondsD. d.The number of ligands around a metal ion bonded by o-bonds |
| Answer» Correct Answer - A::B::C | |
| 834. |
In a coordination complex the negative groups or neutral molecules attached to the central atoms are termed as _______ . |
| Answer» Correct Answer - Ligand | |
| 835. |
The coordination number of a central metal atom in a complex is determined by:A. the number of only anionic ligands bonded to metal ionB. the number of ligands around a metal ion bonded by pi bondsC. the number of ligands around a metal ion bonded by sigma and pi bondsD. the number of ligands around a metal ion bonded by sigma bonds |
| Answer» Correct Answer - D | |
| 836. |
The compound having tetrahedral geometry isA. `[Ni (CN)_(4)]^(2-)`B. `[Pd (CN)_(4)]^(2-)`C. `[Pd Cl_(4)]^(2-)`D. `[Ni Cl_(4)]^(2-)` |
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Answer» Correct Answer - D |
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| 837. |
The complex which has no d-electron in the central metal atom is .A. `[MnO_(4)]^(Θ)`B. `[Co(NH_(3))_(6)]^(3+)`C. `[Fe(CN)_(6)]^(3-)`D. `[Cr(H_(2)O)_(6)]^(3+)` |
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Answer» Correct Answer - a `MnO_(4)^(Θ):Mn(+7),Mn(Z =25)implies 3d^(5) 4s^(2)` No d - electrons left . `Mn^(+7) =3d^(0)` . |
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| 838. |
The pair of compounds having metals in their highest oxidation state isA. `MnO_(2),FeCl_(3)`B. `[MnO_(4)]^(-),CrO_(2)Cl_(2) `C. `[Fe (CN)_(6)]^(3-),[Co(CN)_(3)]`D. `[NiCl_(4)]^(2-),[CoCl_(4)]^(-)` |
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Answer» Correct Answer - B `[MnO_(4)]^(-) and CrO_(2)Cl_(2)` compounds have metals in their highest oxidation state . |
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| 839. |
The pair of compounds having metals in their highest oxidation state is .A. `MnO_(2),FeCI_(3)`B. `[MnO_(4)]^(Θ),CrO_(2)CI_(2)`C. `[Fe(CN)_(6)]^(3-),[Co(CN)_(6)]^(3-)`D. `[NiCI_(4)]^(2-),[CoCI_(4)]^(Θ)` |
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Answer» Correct Answer - b `MnO_(2)(+4)` and `FeCI_(3)(+3)` (b) `MnO_(4)^(Θ)(+7)` and `CrCO_(2)CI_(2)(+6)` (c ) `[Fe(CN)_(6)]^(3-)(+3)` and `[Co(CN)_(6)]^(3-) (+3)` (d) `[NiCI_(4)]^(2-)` and `[CoCI_(4)]^(+3)` For manganese, `+7` is the maximum oxidation state and for chromium `+6` is the maxium oxidation state . |
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| 840. |
The chemical formula of diammine silver (I) chloride isA. (a) `[Ag(NH_3)]Cl`B. (b) `[Ag(NH_3)_2]Cl`C. (c) `[Ag(NH_3)_2]Cl`D. (d) `[Ag(NH_4)_2]Cl` |
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Answer» Correct Answer - B It is clear from the chemical formulae that `Ag` is central metal atom and ligands are 2 ammonia molecules. Hence, compound is `[Ag(NH_3)_2]Cl`. |
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| 841. |
The pair of the compounds in which both the metals are in the highest possible oxidation state isA. (a) `[Fe(CN)_6]^(3-)`, `[Co(CN)_6]^(3-)`B. (b) `CrO_2Cl_2`, `MnO_4^(-)`C. (c) `TiO_3`, `MnO_2`D. (d) `[Co(CN)_6]^(3-), MnO_3` |
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Answer» Correct Answer - B `Croverset(+6)(O_2)Cl_2, overset(+7)(Mn)O_4`. |
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| 842. |
The pair of the compounds in which both the metals are in the highest possible oxidation state isA. (a) `[Fe(CN)_6]^(3-) [Co(CN)_6]^(3-)`B. (b) `CrO_2Cl_2`, `MnO_4^(-)`C. (c) `TiO_3`, `MnO_2`D. (d) `[Co(CN)_6]^(3-)`, `MnO_3` |
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Answer» Correct Answer - B `overset(+6)CrO_2Cl_2, overset(+7)MnO_4`. |
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| 843. |
IUPAC name of `[Co(NH_3)_5NO_2]Cl_2`A. (a) pentamminentro-N-cobalt (III) chlorideB. (b) pentaamminenitrosocobalt (III) chlorideC. (c) pentaamminenitrocobalt (II) chlorideD. (d) None of these |
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Answer» Correct Answer - A pentamminenitro-N-cobalt (III) chloride. |
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| 844. |
Types of isomerism shown by `[Cr(NH_3)_5NO_2]Cl_2` isA. (a) OpticalB. (b) IonisationC. (c) GeometricalD. (d) Linkage |
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Answer» Correct Answer - D `NO_2` is ambient and can be linked either to `N^(-)` side as `(-NO_2)` or to `O`-side as `(-ONO)`. |
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| 845. |
IUPAC name of `[Co(NH_3)_5NO_2]Cl_2`A. (a) Pentamminenitrocobalt (III) chlorideB. (b) Pentaminenitrosocobalt (III) chlorideC. (c) Pentaminenitrocobalt (II) chlorideD. (d) None of these |
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Answer» Correct Answer - A In the compounds `[Co(NH_3)_5NO_2]Cl_2`, the oxidation state of cobalt is `+3` and here `5NH_3` ligands, a `NO_2` ligand are attached to the central atom. Therefore its name is pentaamminenitrocobalt (III) chloride. |
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| 846. |
Which of the folowing is an example of `pi` boneded organometallic complex ?A. FerroceneB. DibenzenechromiumC. `Zn(C_(2)H_(5))_(2)`D. `Pb(C_(2)H_(5))_(4)` |
| Answer» Correct Answer - A::B | |
| 847. |
IUPAC name of `[Co(NH_3)_3(H_2O)_2Cl]Cl_2` isA. (a) diaquachloridodiammine cobalt (III) chlorideB. (b) triamminediaquachlorido cobalt (III) chlorideC. (c) chlorodiamminediaqua cobalt (III) chlorideD. (d) diamminediaquachlorido cobalt (II) chloride |
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Answer» Correct Answer - B triamminediaquachlorido cobalt (III) chloride |
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| 848. |
The metal carbonyl which is paramagnetic isA. `Ni(CO)_(4)`B. `V(CO)_(6)`C. `Cr(CO)_(6)`D. `Fe(CO)_(5)` |
| Answer» Correct Answer - B | |
| 849. |
Which of the following is/are example (s) of o-bonded organometallic compound?A. `Al_(2)(CH_(3))_(6)`B. `Pb(CH_(3))_(4)`C. `Zn(C_(2)H_(5))_(2)`D. Ferrocene |
| Answer» Correct Answer - A::B::C | |
| 850. |
Select the correct `IUPA` name of `[Mo(sigma -C_(3)H_(5))(pi - C_(5)H_(5))(CO_(3))]` .A. Tricarbonyl `(eta^(5)`-cyclopentadinenyl) ally1 molybdate(II) .B. Allytricarbonyl`(eta^(5)`-cyclopentadiene)molybdate(II)C. Allytricarbonyl`(eta^(5)`-cyclopentadiene)molybdate(II)D. Allytricarbonyl`(eta^(5)`-cyclopentadiene)molybdate(II) |
| Answer» Correct Answer - D | |