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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.
| 151. |
Out of following which ligand is a `pi` acid ligand ?A. COB. `NH_(3)`C. `Cl^(-)`D. `H_(2)O` |
| Answer» Correct Answer - A | |
| 152. |
Which of the following is a `pi`-acid ligand?A. (a) `NH_3`B. (b) `CO`C. (c) `F^(-)`D. (d) ethylene diamine |
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Answer» Correct Answer - D `Co` is a `pi`-acid ligand. |
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| 153. |
Among the ligands `NH_3`, `en`, `CN^(-)` and `CO`, the correct order of their increasing field strength, isA. (a) `COltNH_3ltenltCN^(-)`B. (b) `NH_3ltenltCN^(-)ltCO`C. (c) `CN^(-)ltNH_3ltCOlten`D. (d) `enltCN^(-)ltNH_3ltCO` |
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Answer» Correct Answer - B Based on spectrochemical series, ligands arranged in increasing order of crystal field strength are as `NH_3ltenltCN^(-)ltCO` |
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| 154. |
Assertion : `[Ti(H_(2)O)_(6)]Cl_(3)` on heating becomes colourless . Reason : Water is removed on heating `[Ti(H_(2)O)_(6)]Cl_(3)` .A. If both Assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is falseD. if both assertion and reason are false |
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Answer» Correct Answer - A In the absence of ligand , crystal field splitting does not occur and hence the substance is colourless. |
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| 155. |
Write the name of the following ligands and classify their denticity (a) o- phen (b) `NOS^(-)` |
| Answer» Correct Answer - (a) 1,10-diaminophenanthrene, bidentate (b) thionitrito, monodentate | |
| 156. |
Which of the following are all features of isomers of `[Co (en)_(3)] Cl_(3)` ? Isomers areA. superimosable mirror images with identical chemical forumulae and the same chemical reactivities with other compounds that are not optical isomersB. non-superimosable mirror images with identical chemical formulae and the same chemical reactivities with other compounds that are not optical isomersC. non-superimposable mirror images with dissimilar chemical formulae but similar chemical reactivities with other compounds that are not optical isomersD. superimposable mirror images with identical chemical formulae and similar physical properties |
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Answer» Correct Answer - B |
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| 157. |
What is the relationship between the following two square planar complex ions ? The complex ions are A. linkage isomersB. coordination isomersC. geometric isomersD. the same |
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Answer» Correct Answer - D |
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| 158. |
The two compounds sulphato penta-ammine cobalt (III) bromide and sulphato penta-ammine cobalt (III) chloride represent:A. (a) Linkage isomerismB. (b) Ionisation isomerismC. (c) Co-ordination isomerismD. (d) No isomerism |
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Answer» Correct Answer - D Sulphato penta-ammine cobalt (III) bromide `[Co(NH_3)_5SO_4]Br` Sulphato penta-ammine cobalt (III) chloride `[Co(NH_3)_5SO_4]Cl` Both are separate compounds and do not show any type of isomerism. |
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| 159. |
A square planar complex is represented as:A. (a) Geometrical isomersB. (b) Optical isomerismC. (c) Linkage isomerismD. (d) None |
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Answer» Correct Answer - A Square planar complex can show geometrical isomerism. |
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| 160. |
Which of the following pairs represents linkage isomers?A. (a) `[Cu(NH_3)_4][PtCl_4]` and `[Pt(NH_3)_4][CuCl_4]`B. (b) `[Pd(PPh_3)_2(NCS)_2` and `[Pd(PPh_3)_2(SCN)_2]`C. (c) `[Co(NH_3)_5]NO_3SO_4` and `[Co(NH_3)_5SO_4]NO_3`D. (d) `[PtCl_2(NH_3)_4]Br` and `[PtBr_2(NH_3)_4Cl_2` |
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Answer» Correct Answer - B Linkage isomers are caused due to the presence of ambidentate ligands `[Pd(PPh_3)_2(NCS)_2` and `[Pd(PPH_3)_2(SCN)_2]` is a linkage isomers due to SCN, an ambidentate ligand. Thus, SCN can linked to Pd by both N as well as S through their lone pairs. |
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| 161. |
Which of the following pairs corresponds to linkage ismerism ?A. `[Co(en)_(3)][Cr(CN)_(6)]` and `[Cr(en)_(3)][Co(CN)_(6)]`B. `[Mn(CO)_(5)(SCN)]` and `[Mn(CO)_(5)(NCS)]`C. `[Co(MH_(3))_(5)(NO_(3))]SO_(4)` and `[Co(NH_(3))_(5)(SO_(4))] NO_(3)`D. `[Co(NH_(3))_(4) (H_(2)O)CI]CI_(2)` and `[Co(NH_(3))_(4)CI_(2)]CI.H_(2)O` |
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Answer» Correct Answer - B Linkage isomerism arises in a coordination compound containing ambidentate ligand such as the thiocyanate ligand, `NSC^(-)` , which may bind either through the N to give `M-NCS` or through S to give `M-SCN` . (1) Coordination isomerism, (3) Ionization isomerism and (4) Hydrate isomerism |
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| 162. |
The hybridisation of `[NiCl_(2)(PPh_(3))_(2)]` and `[NiCl_(2)(PMe_(3))_(2)]` are respectively ( consider `PPh_(3)` a bulkier ligand than `Pme_(3)) :`A. `sp^(3)` and `dsp^(2)`B. `sp^(3)" and "sp^(3)`C. `dsp^(2)" and " dsp^(2)`D. `dsp^(2) " and " sp^(3)` |
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Answer» Correct Answer - 1 Both are strong field figure ligands but complex with `PPh_(3)` is tetrahedral due to its bulkier nature. |
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| 163. |
Which of the following pairs of complexes are isomeric with each their but their aqueous solutions exhibit different molar conductivities ?A. `[CoBr(NH_(3))_(5)SO_(4)" and "[Co(SO_(4))(NH_(3))_(5)]Br`B. `[CoCl_(2)(NH_(3))_(4)" and "[CoCl(NO_(2))(NH_(3))_(4)]Cl`C. `[PtCl_(2)(NH_(3))_(4)Br" and "[PtBr_(2)(NH_(3))_(4)]Cl`D. `[Co(NO_(2))(NO_(3))_(5)Cl_(2)" and "[Co(ONO)(NH_(3))_(5)]Cl_(2)` |
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Answer» Correct Answer - 1 `[CoBr(NH_(3))_(5)]SO_(4)hArr[CoBr(NH_(3))_(5)]^(2+)+SO_(4)^(2-)," Total charge"=4` `[Co(SO_(4))(NH_(3))_(5)]BrhArr[Co(SO_(4))(NH_(3))_(5)]^(+)+Br^(-)," Total charge"=2` Hence, both have different molar conductivities. |
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| 164. |
Ziegker-Natta catalyst, used as a catalyst for the low temperature polmerisation al alkene is an example of_________catalysis and is represented as_______ . |
| Answer» Correct Answer - Heterogeneous `(C_(2)H_(5))_(3)AI+TiCI_(4)` | |
| 165. |
`d^(2) sp^(3)` hybridisation of the central atom gives the ______orbital complex while `sp^(3) d^(2)` hybridisation gives the_________orbital complex . |
| Answer» Correct Answer - Inner,Outer | |
| 166. |
Recently the platinum complex known as cisplatin has been found in the treatment of _________and is represented as_______ . |
| Answer» Correct Answer - Cancer cis `[PtCI_(2)(NH_(3))_(2)]` | |
| 167. |
The compound which does not show paramagnetism isA. (a) `[Cu(NH_3)_4]Cl_2`B. (b) `[Ag(NH_3)_2]Cl`C. (c) `NO`D. (d) `NO_2` |
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Answer» Correct Answer - B In `[Ag(NH_3)_2]Cl`, `Ag^(+)` contains `d^(10)` configuration. All others contain unpaired electrons. |
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| 168. |
The compound which does not show paramagnetism isA. `[Cu(NH_(3))_(4)Cl_(2)]`B. `[Ag(NH_(3))_(2)]Cl`C. `NO`D. `NO_(2)` |
| Answer» Correct Answer - B | |
| 169. |
Amongst `Ni(CO)_(4),[Ni(CN)_(4)]^(2-) and NiCl_(4)^(2-)`:A. `Ni(CO)_(4) and NiCl_(4)^(2-)` are diamagnetic and `[Ni(CN)_(4)]^(2-)` is paramagnetic .B. `NiCl_(4)^(2-) and [Ni(CN)_(4)]^(2-)` are diamagnetic and `Ni(CO)_(4)` is paramagneticC. `Ni(CO)_(4) and [Ni(CN)_(4)]^(2-)` are diamagnetic and `NiCl_(4)^(2-)` is paramagneticD. `Ni(CO)_(4)` is diamagnetic and `NiCl_(4)^(2-) and [Ni(CN)_(4)]^(2-)` are paramagnetic. |
| Answer» Correct Answer - C | |
| 170. |
Allthe following complexes show a decrease in their weights when placed in a magnetic balance. Then which of the these has square planar geometry ?A. `Ni(CO)_(4)`B. `K[AgF_(4)]`C. `Na_(2)[Zn(CN)_(4)]`D. None of these |
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Answer» Correct Answer - B In `K[AgF_(4)],Ag(III)` has `4d^(8)` configuration. This has higher CFSE which favours pairing of electrons and thus complex is diamagnetic and square planar. |
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| 171. |
Select the correct statementA. Complex ion `[MoCl_(6)]^(3-)` is paramagneticB. Complex ion `[Co(en)_(3)]^(3+)` is diamagneticC. Both (A) and (B) are correctD. None of correct |
| Answer» Correct Answer - C | |
| 172. |
Which of the following complexes has a geometry different from others ?A. `[NiCl_(4)]^(2-)`B. `Ni(CO)_(4)`C. `[Ni(CN)_(4)]^(2-)`D. `[Zn(NH_(3))_(4)]^(2+)` |
| Answer» Correct Answer - C | |
| 173. |
The oxidate state of Co in `[Co(H_2O)_5Cl]^(2+)` isA. (a) `+2`B. (b) `+3`C. (c) `+1`D. (d) `+4` |
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Answer» Correct Answer - B `[underset(x)Counderset(0)((H_2O)_5)underset(-1)Cl]^(+2)` `x-1=2impliesx=+3` |
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| 174. |
`EAN`of`[Feeta^(2)-C_(5)H_(5))(CO)_(2)CI]:`A. `36`B. `35`C. `37`D. `34` |
| Answer» Correct Answer - A | |
| 175. |
How many type of geometrical isomers are possible for `[M(NH_(3))BrCl(H_(2)O)]`, where M is `Pt^(+2)` ? |
| Answer» Correct Answer - 3 | |
| 176. |
The coordination number of Fe in `[Fe(eta^(5)-C_(5)H_(5))_(2)]` is 2x . Then x will be ______ |
| Answer» Correct Answer - 5 | |
| 177. |
`EAN` of na`[PtCI_(3)(eta^(2)-C_(2)H_(2))]` is .A. `86`B. `78`C. `84`D. `34` |
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Answer» Correct Answer - C `K[Pt^(II) CI_(3)(eta^(2)-C_(2)H_(2))]` `EAN` of `Pt = 78 - 2 + 3 xx 2 + 2 = 84` . |
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| 178. |
Potassium trioxalatochromate (III ) isA. `K_(2)[Cr(C_(2)O_(4))_(3)]`B. `K[Cr(C_(2)O_(4))_(3)]`C. `K_(2)[Cr(C_(2)O_(4))_(3)]`D. `K_(4)[Cr(C_(2)O_(4))3]` |
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Answer» Correct Answer - A ` [Cr (C_(2) O_(4) )_(3) ]^(3-)` oxidation state `+3+(-6 ) =-3` thus ,`K_(3) [Cr (C_(2) O_(4) )_(3)].` |
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| 179. |
Geometrical isomerism is shown byA. `[Ni(NH_(3))_(5)Br]^(+)`B. `[Cr(NH_(3))_(4)(en)(H_(2)O)_(4)]^(3+)`C. `[Co(en)_(3)]^(3+)`D. `[Co(NH_(3))_(4)(en)]^(3+)` |
| Answer» (d) Gemetrical isomerism is exhibited by octahedral comlexes like `[Co(NH_(3))_(2)(en)_(2)^(3+)]` | |
| 180. |
Which will not show geometrical is shown byA. `[Co(NH_(3))_(4)CI_(2)^(+)]`B. `[Co(en)_(3)]^(3+)`C. `[Co(en)_(2)CI_(2)]CI`D. `[Cr(NH_(3))_(4) CI_(2)]CI` |
| Answer» (b) `[Co(en)_(3)]^(3+)` cannot show geometrical isomerism, in it, Co-atom is linked with 3-same ligands. | |
| 181. |
The planar complex Mabcd givesA. two optical isomersB. two geometrical isomersC. three geometical isomersD. |
| Answer» (d) Mabcd type complex have three geometrical isomers. | |
| 182. |
The oxidation state of `Cr` in `[Cr(NH_(3))_(4)Cl_(2)]^(+)` is: |
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Answer» Correct Answer - D Let the oxidation state of `Cr=x, NH_(3) =0 ,Cl=-1` Net charge =+1 `therefore [Cr(NH_(3))_(4) Cl_(2)]^(+)` `x+4xx0+2(-1) =+1` ` therefore x=+3` |
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| 183. |
A complex compound in which the oxidation number of a metal is zero , isA. `K_(4)[fe(CN)_(6)]`B. `K_(3)[Fe(CN)_(6)]`C. `[Ni(CO_(4))]`D. `[Pt(NH_(3))_(4)]Cl_(2)` |
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Answer» Correct Answer - C CO is a neutral ligand , so the oxidation state of metal in metal carbonyls is always zero . |
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| 184. |
Which of the following statement(s) is / are correct ?A. `[Co(NH_(3))_(6)]^(3+), [Co(CN)_(6)]^(3-) and [Co(NO_(2))_(6)]^(3-)` are diamagnetic involving `d^(2)sp^(3)` hybridisation.B. `[Zn(NH_(3))_(4)]^(2+),[FeCl_(4)]^(-) and [Ni(CO)_(4)]` are diamagnetic involving `sp^(3)` hybridisation.C. The magnetic moment of `[Fe(H_(2)O)_(6)]^(3+)` is 5.92 BM and that of `[Fe(CN)_(6)]^(3-) ` is 1.73D. The magnetic moment of `K_(4)[MnF_(6)] and K_(3)[FeF_(6)]` are same . |
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Answer» Correct Answer - A::C::D (A) All are diamagnetic and inner orbital complexes because all ligands are strong field ligands. (B) `Fe^(3+) n=5,mu=sqrt(5(+2))~~5.92` with `H_(2)O`, so `[FeCl_(4)]^(-)` is diamagnetic. ( C) `Fe^(3+)n=5,mu=sqrt(5(5+2))~~5.92` with `H_(2)O`. `Fe^(3+) n=1,mu=sqrt(3)=1.73` with `CN^(-)`. (D) `Mn^(2+)(3d^(5)) and Fe^(3+)(3d^(5))` have same number of unpaired electrons i.e. 5 with weak field ligands, `F^(-)`. |
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| 185. |
Which of the following name formula combinations is not correct ?A. `{:(,"Formula","Name"),((1),K_(2)[Pt(CN)_(4)],"Potasium tetracyanoplatinate(II)"):}`B. `{:(,"Formula","Name"),((2),[Mn(CN)_(5)]^(2-),"Pentacyanomagnate(II) ion"):}`C. `{:(,"Formula","Name"),((3),K[Cr(NH_(3))_(2)Cl_(4)],"Potassium diammine tetrachlorochromate"):}`D. `{:(,"Formula","Name"),((4),[Co(NH_(3))_(4)(H_(2)O)I]SO_(4),"Tetraammine aquaiodo cobalt (III) sulphate"):}` |
| Answer» Correct Answer - B | |
| 186. |
The coordination number of `Co "in" [Co(NH_(3))_(5)Cl]Cl_(2)` isA. 2B. 5C. 6D. 1 |
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Answer» Correct Answer - C The coordination of cobalt is 6 . |
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| 187. |
Consider the coordination compound , `[Co(NH_(3))_(6)]Cl_(3)`. In the formation of the complex, the species which acts as the Lewis acid is :A. `[Co(NH_(3))_(6)]^(3+)`B. `Cl^(-)`C. `Co^(3+)`D. `NH_(3)` |
| Answer» Correct Answer - C | |
| 188. |
In Which of the following pair fo complexes the central metal/ions do have same effective atomic number ?A. `[Cr(CO)_(6)] and [Fe(CO)_(5)]`B. `[Co(NH_(3))_(6)]^(2+) and [Ni(NH_(3))_(6)]^(2+)`C. `[Cu(CN)_(4)]^(3-) and [Ni(CO)_(4)]`D. `[V(CO)_(6)]^(-) and [Co(NO_(2))_(6)]^(3-)` |
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Answer» Correct Answer - A::C::D (A) EAN of Cr=24+12=36 and EAN of Fe=26+10=36 (B) EAN of `Co^(3+)`=256+12=37 and EAN of `Ni^(2+)`=26+12=38 ( C) EAN of `Cu^(+)`=28+12=36 and EAN of Ni=28+8=36. (D) EAN of `V^(-)`=24+12=36 and EAN of `Co^(3+)`=24+12=36 |
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| 189. |
Formation of complex compound can be detected byA. (a) Change in colourB. (b) Change in solubilityC. (c) Change in pHD. (d) Change in electrical conductivity |
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Answer» Correct Answer - D Formation of complex compound can be detected by. Change in color, solubility, pH, electrical conductivity. |
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| 190. |
According to effective atomic number rule the central metal acquires:A. (a) Inert gas configurationB. (b) DupletC. (c) OctetD. (d) Quartet |
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Answer» Correct Answer - A According to effective atomic number rule the central metal acquires inert gas configuration. |
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| 191. |
Which of the following pairs of structures shows geometrical isomerism ? A. I with IIIB. II with IVC. I with IID. none of these |
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Answer» Correct Answer - C (A) I and III both are identical structure ( i.e. trans-isomers ). (B) II and IV are identical structure (i.e. cis-isomers ). ( C) I and II are cis- and trans- isomers (i.e. they are geometrical isomers ). |
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| 192. |
If a complexing metal of the first transition series has a di configuration for what values of could magntic properties alone distinguish between strong field and weak field ligand in octanderal coordination . |
| Answer» When `I = 4,5,6` and 7 `d^(4) d^(5) d^(6)` and `d^(7)` configuration magnetic values alone can distinguish between strong field and weak field ligands in octahedral coordination . | |
| 193. |
The hybridisation of Co in `(CoF_(6))^(-2)` isA. `sp^(3)d^(2)`B. `d^(2)sp^(3)`C. `sp^(3)d^(3)`D. `d^(3)sp^(3)` |
| Answer» Correct Answer - B | |
| 194. |
Grignard reagent is a _______organometaollic compound . |
| Answer» Correct Answer - sigma-bonded | |
| 195. |
`EDTA` is used as a complexing agent in ____________estimation of metal ions like `Ca^(2+) ,M^(2+)` and `Zn^(2+)` ions . |
| Answer» Correct Answer - Volumetric | |
| 196. |
The strong field ligand is "A. `SCN^(-)`B. `NO_(2)^(-)`C. `I^(-)`D. `S^(2-)` |
| Answer» Correct Answer - B | |
| 197. |
`[Co(NH_(3))_(6)]^(3+)` is diamagnetic while `[CoF_(6)]^(3-)` is_____ . |
| Answer» Correct Answer - Paramagnetic | |
| 198. |
Dimethylglyoxime is used from the gravimetic estimation of ______ion . |
| Answer» Correct Answer - `Ni^(2+)` | |
| 199. |
`[ptabcd]^(n+-)` has_________shape and has ______geometrical isomers . |
| Answer» Correct Answer - Square planner,three | |
| 200. |
Trans form of `[M(AA)_(2)a_(2)]^(n+)` complex does not show ________isomerism . |
| Answer» Correct Answer - Optical | |