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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.
| 201. |
IUPAC name of `[Co(en)_(2)Cl_(2)]Cl` isA. dichloridobis (ethylene diammine) cobalt (III) Chloride.B. dichloridobis (ethylenediammine) cobalt (III) ChlorideC. dichlorobis (ethlene diamine) cobalt (III) Chloride.D. dichloridobis (ethylene diamine) cobalt (III) chloride |
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Answer» Correct Answer - d Organic amine and for `NH_(3)`-ammine. Note the spelling |
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| 202. |
Three arrangements are shown for the complex `[Co(en)(NH_(3))_(2)Cl_(2)]^(+)` pick up the wrong statement. A. I and II are geometrical isomersB. II and III are optical isomersC. I and III are optical isomersD. II and III are geometrical isomers |
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Answer» Correct Answer - B,C,D II and III have plane of symmety and identical. I is chiral molecule. |
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| 203. |
If `Delta_(0)ltP` then electronic arrangement of metal atom`//`ion in an octahederal complex with `d^(4)` configuration is `t_(2g)^(x)e_(g)^(y)`. What is the value of x |
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Answer» Correct Answer - 3 `(t_(2g))^(3) (e_(g))^(1)` |
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| 204. |
The no. of chelating ligands areA. SulphatoB. EDTAC. nitratoD. thiosulphato |
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Answer» Correct Answer - 1 EDTA |
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| 205. |
The no. of complexes showing and mer isomerism (A) `[Co(NH_(3))_(3)Cl_(3)]` (B) `[Co(en)_(3)]^(+3)` `[Co(gly)_(3)]` (D) `[Co(NH_(3))_(2)(H_(2)O)_(2)Cl_(2)]` (E) `[Fe(dipy)_(3)]^(+2)` (F)`[Fe(o-phen)_(3)]^(+2)` |
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Answer» Correct Answer - 2 `[Ma_(3)b_(3)]^(n pm)` and `[M (AB)_(3)]^(n pm)` show fac and mer isomerism . |
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| 206. |
`[Cr(NH_(3))_(5)Br]Cl` and `[Cr(NH_(3))_(5)Cl]Br` can be distinguished by/and isomerism shown is:A. `BaCl_(2)`, ionisationB. `AgNO_(3)`, ionisationC. `AgNO_(3)`, coordinateD. `BaCl_(2)`,linkage |
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Answer» Correct Answer - B with `AgNO_(3)`, AgCl(white) and AgBr(Pale yellow) precipitates are given. |
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| 207. |
What kind of isomerism exists between `[Cr(H_(2)O)_(6)]Cl_(3)` (violet) and `[Cr(H_(2)O)_(5)Cl].H_(2)O` (greyish-green)?A. Linkage isomerismB. Solvate isomerismC. Ionisation isomerismD. Coordination isomerism |
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Answer» Correct Answer - 2 The given compounds have different number of water molecules inside and outside the coordinate sphere. |
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| 208. |
Which of the following statements is not correct?A. The complexes `[NiCl_(4)]^(2-)` and `[Ni(CN)_(4)]^(2-)` differ in their magnetic properties.B. The complexes `[NiCl_(4)]^(2-)` and `[Ni(CN)_(4)]^(2-)` differ in the state of hybridisation of nickelC. The complexes `[NiCl_(4)]^(2-)` and `[Ni(CN)_(4)]^(2-)` differ in geometryD. The complexes `[NiCl_(4)]^(2-)` and `[Ni(CN)_(4)]^(2-)` differ in primary valancies of nickel. |
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Answer» Correct Answer - 4 `Cl^(-)` is weak field ligand and `CN^(-)` is strong field ligand `[NiCl_(4)]^(-2)` hybridisation is `sp^(3)` and in `[Ni(CN)_(4)]^(-2)` is `dsp^(2)` |
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| 209. |
Which one of the following complexes? [Atomic numbers, Mn=25, Fe = 26, Co = 27, Ni = 28]A. `[Fe(CN)_(6)]^(4-)`B. `[Mn(CN)_(6)]^(4-)`C. `[Co(NH_(3))_(6)]^(3+)`D. `[Ni(NH_(3))_(6)]^(2+)` |
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Answer» Correct Answer - 4 All octahdral `Ni^(2+)` complexes are outer orbital complexes. |
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| 210. |
Diethylene triamine is:A. Chelating agentB. Polydentate ligandC. Tridentate ligandD. All of these |
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Answer» Correct Answer - D Diethylene triamine is chelate ligand. It is tridentate ligand. |
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| 211. |
The donor sites of `(EDTA)^(4-)` are ?A. o atoms onlyB. N atoms onlyC. Two N atoms and four O atomsD. Three N atoms and three O atoms |
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Answer» Correct Answer - c See the structure |
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| 212. |
The IUPAC name of the red coloured complex `[Fe(C_(4)H_(7)O_(2)N_(2))_(2)]` obtained from the reaction of `Fe^(2+)` and dimethyl glyoximeA. bis (dimethyl glyoxime) ferrate (II)B. bis (dimethyl glyoximato) iron (II)C. bis (2, 3-butanediol dioximato) iron (II)D. bis (2, 3-butanedione dioximato) iron (II) |
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Answer» Correct Answer - B Red coloured complex is bis(dimethylglyosimato) iron(II) |
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| 213. |
The number of donor sites in dimethyl glyoxime, glycinato, diethylene triamine and `EDTA` are respectively(a) `2,2,3` and `4` (b) `2,2,3` and `6` (c ) `2,2,2` and `6` (d)`2,3,3` and `6` .A. 2,2,3 and 4B. 2,2,3 and 6C. 2,2,2 and 6D. 2,3,3 and 6 |
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Answer» Correct Answer - B Conceptual |
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| 214. |
The number of donor sites in dimethyl glyoxime, glycinato, diethylene triamine and `EDTA` are respectively(a) `2,2,3` and `4` (b) `2,2,3` and `6` (c ) `2,2,2` and `6` (d)`2,3,3` and `6` .A. 2, 2, 3 and 6B. 2, 2, 3 and 4C. 2, 2, 2 and 6D. 2, 3, 3 and 6 |
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Answer» Correct Answer - 1 See the structures of the ligands |
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| 215. |
In coordination chemistry there are a veriety of methods applied to find out the structure of complexes. One method involves treating the complex with known reagents and from the nature of reaction, the formula0 of the complex can be predicted. An isomers of the complex `Co(en)_(2)(H_(2)O)Cl_(2)Br`, on reaction with concentrated `H_(2)SO_(4)` (dehydrating agent ) it suffers loss in weight and on reaction with `AgNO_(3)` solution it gives a white precipitate which is soluble in `NH_(3)(aq)`. The correct formula of the complex is :A. `[CoCIBr(en)_(2)]H_(2)O`B. `[CoCl(en)_(2)(H_(2)O)]BrCl`C. `[CoBr(en)_(2)(H_(2)O)]Cl_(2)`D. `[CoBrCl(en)_(2)]Cl.H_(2)O` |
| Answer» (D), As it suffer loss in weight with `H_(2)SO_(4)` . Ionization sphere contains `H_(2)O` molecules . As complex also give white ppt. with `AgNO_(3)` , the isnization sphere should contain `Cl^(-)` ion. So formula may be `[CoBrCl(en)_(2)]Cl.H_(2)O`. | |
| 216. |
Square planar complexes are formed by `d^(8)` ions with strong field ligands The crystal field splitting `Delta_(0)` is larger for the second and theird row transition elements and for more highly charged species All the complexes having `4d^(8)` and `5d^(8)` configurations are mostly square planar including those with weak field ligands such as halide ions square planar complexes can show geometrical isomerism but they do not show optical isomerism due to the presence of plane of symmetry Among the following complexes which has a square planar geometry? (a) `[RhCI(CO)(PPh_(3))_(2)]` (b) `K_(3)[Cu(CN)_(4)]` (c ) `[Ni(CO)_(4)]` (d) `K_(2)[Zn(CN)_(4)]` .A. `Ni(+square square)` and Rh `(+square)` with strong field ligandsB. `Rh(+square)` and Ag `(+square square) ` with strong field ligand.C. `Pd(+square square)` ,Pt `(square square)` and Au `(+square square square )` with strong and weak field ligandsD. None |
| Answer» (D), All form square planar complexes. | |
| 217. |
In coordination chemistry there are a variety of methods applied to find out the structure of complexes.One method involves treating the complex with known reagents and from the nature of reaction, the formula of the complex can be predicted.An isomer of the complex `Co(en)_2(H_2O)Cl_2Br`,on reaction with concentrated `H_2SO_4` (dehydrating agent) it suffers loss in weight and on reaction with `AgNO_3` solution it gives a white precipitate which is soluble in `NH_3`(aq). If one mole of original complex is treated with excess `Pb(NO_3)_2` solution, then the number of moles of white precipitate (of `PbCl_2`) formed will be :A. 0.5B. `1.0`C. `0.0`D. `3.0` |
| Answer» (A), Only one `Cl^(-)` ion is of free ion from complex so 1 mole of complex will generate precipate of half mole of `Pb^(2)+2Cl^(-) rarr PbCl_(2)darr` (white) | |
| 218. |
`Co^(2+)(aq.) +SCN^(-)(aq.) rarr `Complexe (X) `Ni^(2+)(aq.)+"Dimetyhlglyoxime" overset(NH_(4)OH)rarr ` complex (Y) The coordination number of cobalt and nickel in complexes X and Y are four. The IUPAC names of the complexes (X) and (Y) are respectively :A. tetrathicyanato-S -Cobalt (II) and bis (dimethylglyoximate ) nickel (II).B. tetrathicyanato-S -Cobaltate (II) and bis (dimethylglyoximato ) nickel (II).C. tetrathicyanato-S -Cobaltate (II) and bis (dimethylglyoximato ) nickelate (II).D. tetrathicyanato-S -Cobaltate (II) and bis (dimethylglyoximato) nickel (II). |
| Answer» (B), `(X)=[Co(SCN)_(4)]^(2-), Y=[Ni(dmg)_(2)].` | |
| 219. |
The hybridization of the metal in `[CoF_(6)]^(3-)` isA. `sp^(3)d^(2)`B. `d^(2)sp^(3)`C. `dsp^(3)`D. `sp^(3)d` |
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Answer» Correct Answer - a `F^(-)` is weak field ligand. |
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| 220. |
The theoritical spin-only magnetic moment of cobalt in `Hg[Co(SCN)_(4)]` is 3.87 B.M. |
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Answer» Correct Answer - 3 `Co^(2+) : 3d^(7) , Co^(3+) , 3d^(6)` , |
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| 221. |
The shape of `[CoF_(6)]^(-3)` isA. Square plannerB. Trigonal bipyramidalC. OctahedralD. Tetrahedral |
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Answer» Correct Answer - 1 Coordination number 6. So shape is octahedral |
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| 222. |
Geometry, hybridisation and magnetic moment of the ions `[Ni(CN)_(4)]^(2-),[MnBr_(4)]^(2-)` and `[FeF_(6)]^(3-)` are .A. Tetrahedral, square planar, octahedral: `sp^(3), dsp^(3), sp^(3)d^(2): 5.9,0,4.9`B. Tetrahedral, square planar, octahedral: `dsp^(2), sp^(3), sp^(3)d^(2) : 0, 5.9, 4.9`C. Square planar, tetrahedral, octahedral: `dsp^(2),sp^(3),d^(2)sp^(3) : 5.9,4.9,0`D. Square planar, tetrahedral, octahedral: `dsp^(3),sp^(3),sp^(3)d^(2) : 0,5.9,4.9` |
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Answer» Correct Answer - 4 Apply Pauling VBT |
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| 223. |
Amongest `[Co(OX)_(3)]^(3-),[CoF_(6)]^(3-),[Co(NH_(3))_(6)]^(3+)` and `[Co(NH_(3))_(6)]^(2+)` the no. of coloured complexes |
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Answer» Correct Answer - 4 `d^(6)` to `d^(7)` coloured , d `to` d transition. |
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| 224. |
The correct order of their paramagnetic moment (spin only) is `P:[FeF_(6)]^(3-),Q:[CoF_(6)]^(3-)` `R:[V(H_(2)O)_(6)]^(3+),S:[Ti(H_(2)O)_(6)]^(3+)`A. `P gt Q gt R gt S`B. `P lt Q lt R lt S`C. `P = Q = R = S`D. `P gt R gt Q gt S` |
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Answer» `(A) , (P) to Fe^(+3), n=5,(Q) to Co^(3+),n= 4 ` ( R) `to V^(3+), n=2, (S) to Ti^(3+),n=1` no = no. of unpaired electrons |
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| 225. |
The magnetic moment of complex given below are in the order: (I) `[Ni(CO)_(4)]` (II) `[Mn(CN)_(6)]^(4-)` (III) `[Cr(NH_(3))_(6)]^(3+)` (IV) `[CoF_(6)]^(3-)`A. I gtII gtIII gtIVB. I ltII ltIII ltIVC. IV gt II gtI gtIIID. IV lt II ltI ltIII |
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Answer» Correct Answer - b Use Pauling VB theory . |
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| 226. |
How many EDTA molecules are required to make an octahedral complex with a `Ca^(2+)` ion?A. twoB. sixC. threeD. one |
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Answer» Correct Answer - 4 `[Ca(EDTA)]^(2-)` |
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| 227. |
The d electron congfiguration of `Cr^(2+)` , `Mn^(2+)` , `Fe^(2+)` and `Ni^(2+)` are `3d^(4)` , `3d^(5)` , `3d^(6)` and `3d^(8)` respectively. Which one of the folowing aqua complexes will exhibit the minimum paramagnetic behaviour ? `(At. No . Cr = 24, Mn = 25, Fe = 26, Ni = 28)`A. `[Fe(H_(2)O)_(6)]^(+2)`B. `[Mn(H_(2)O)_(6)]^(+2)`C. `[Cr(H_(2)O)_(6)]^(+2)`D. `[Ni(H_(2)O)_(6)]^(+2)` |
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Answer» Correct Answer - 4 `H_(2)O` is weak field ligands so, the electrons are not paired up. (1) `n = 4 to mu = 4.85 BM` (2) `n=5 to mu = 5.92 BM` (3) `n=4 to mu = 4.85 BM` (4) `n=2 to mu = 2.8 BM` |
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| 228. |
Optical isomer haveA. property of chiralityB. almost identical chemist propertiesC. almost identical physical propertiesD. all the above |
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Answer» Correct Answer - 1 Optical isomers are differ towards rotation of plane polarised light |
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| 229. |
Number of chlorides satisifying secondary valency in `CoCl_(3)4NH_(3)`A. `2`B. `3`C. `4`D. `1` |
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Answer» Correct Answer - 1 `[Co(NH_(3))_(4)Cl_(2)]Cl` |
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| 230. |
The primary valency of the metal ion is satisfied byA. neutral moleculesB. positive ionsC. negative ionsD. all the above |
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Answer» Correct Answer - 3 Except in brown ring formation, always by negative ions. |
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| 231. |
The ionizable valency of Ni in `Ni(CO)_(4)` isA. `2`B. `4`C. `0`D. `1` |
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Answer» Correct Answer - 3 No primary valencies which can ionise |
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| 232. |
No of ionizable & non-ionizable `Cl^(-)` ions in `CoCl_(3)5NH_(3)` representively areA. `3, 0`B. `2, 1`C. `1, 2`D. `0, 3` |
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Answer» Correct Answer - 2 `[Co(NH_(3))_(5)Cl]Cl_(2)` |
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| 233. |
In `Ni^(2+)` octahedral complex ,which of the following ligands do not pair up the electrous ?A. `NH_(3)`B. `H_(2)O`C. enD. Dien |
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Answer» Correct Answer - a,b,c,d `Ni^(2) : 3d^(8)` , All octahedral `Ni^(2+)` complexes are `sp^(3)d^(2)` and paramagnetic . |
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| 234. |
Which of the following system has maximum number of the unpaired electrons in an inner octahedral complex?A. `d^(4)`B. `d^(9)`C. `d^(7)`D. `d^(5)` |
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Answer» Correct Answer - 1 In an inner orbital complexes: `d^(4) - t_(2g)^(4)e_(g)^(0)`, so two unapired electrons `d^(9) - t_(2g)^(6)e_(g)^(3)`, so one unapired electrons `d^(7) - t_(2g)^(6)e_(g)^(1)`, so one unapired electrons `d^(5) - t_(2g)^(5)e_(g)^(0)`, so one unapired electrons |
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| 235. |
Which of the following statements is/are falseA. In `[PtCl_(2)(NH_(3))_(4)]^(2+)` complex ion, the cis-form is optically active, while trans-form is optically inactiveB. In `[Fe(C_(2)O_(4))_(3)]^(3-)`, geometrical isomerism does not exist, while optical isomerism existsC. `[Mabcd]^(n_(-)^(+))` square planar complexes exhibit both optical as well as geometrical isomerismD. In `[Mabcd]^(n_(-)^(+))` tetrahedral comlexes, optical isomerism cannot be observed |
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Answer» Correct Answer - A,C,D `(IV) to 5` unpaired electrons. `(I) to 4` unpaired electrons. `(II) to 1` unpaired electron. `(III) to` No unpaired electron. |
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| 236. |
The number of unpaired electrons expected for the complex ion `[Cr(NH_(3))_(6)]^(2+)` is :A. `2`B. `3`C. `4`D. `5` |
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Answer» Correct Answer - A See isomerism |
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| 237. |
Of the following complex ions which one can form a chelate with ethylenediamine?A. `cis-[Co(en)_(2)Cl_(2)]^(+)`B. trans-`[Co(NH_(3))_(4)Cl_(2)]^(+)`C. trans-`[Co(NH_(3))_(2)Cl_(4)]^(-)`D. trans-`[Co(en)_(2)Cl_(2)}^(+)` |
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Answer» Correct Answer - A Cis -`[Co(en)_(2)Cl_(2)]^(+)` can form a chelate complex. |
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| 238. |
Which of th efollowing is a bivalent and bidentate ligand?A. NitritoB. OxalatoC. GlycinatoD. Ethylene diamine |
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Answer» Correct Answer - B Oxalate is a bivalent bidantate ligand. |
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| 239. |
Which one of the following give a base when passed through anion exchange resin`[R_(4)N^(+)]OH^(-)` ?A. `K_(4)[Fe(CN)_(6)]`B. `[Co(en)_(3)]Cl_(3)`C. `[CO(NH_(3))_(6)]Cl_(3)`D. `[Fe(H_(2)O)_(6)]SO_(4)` |
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Answer» Correct Answer - a A is anionic camplex , which gives KOH . Others are cationic complexes . |
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| 240. |
The neutral and positive charged species that can coordinate to a metal atom isA. `Cl^(-)`B. `NH_(3)`C. CoD. NO |
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Answer» Correct Answer - d `NO , NO^(+) , NO^(-)` can act as ligands . |
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| 241. |
The number of unpaired electrons in `[Cr(NH_(3))_(6)]^(2+)` is _____________ . |
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Answer» Correct Answer - 2 Apply VBT, partial pairing up occurs. |
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| 242. |
Which one of th efollowing does not form a chelate with oxalate ion by reacting in aqueous solution ?A. cis-`[Co(NH_(3))_(4)Br_(2)]^(+1)`B. cis-`[Co(NH_(3))_(4)Cl_(2)]^(+1)`C. cis-`[Co(en)_(2)Cl_(2)]^(+1)`D. trans-`[Co(en)_(2)Cl_(2)]^(+1)` |
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Answer» Correct Answer - d C is -complexes can form chelate . But trans cannot from chelate ring as it cannot be stable . |
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| 243. |
The number of geometrical isomers and optical isomers of `[Pt(NH_(3))(Br)(Cl)(Py)]` are respectively. |
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Answer» Correct Answer - 3 Square planar complex |
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| 244. |
EDTA has coordination numberA. Monodentate ligandB. Bidentate ligandC. Quadridentate ligandD. Hexadentate ligand |
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Answer» Correct Answer - 4 `(CH_(2)COO^(-))_(2) - N -CH_(2) - CH_(2) - N - (CH_(2)COO^(-))_(2)` |
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| 245. |
the number of five membered chelate rings in `[Zn(EDTA)]^(2-)` is |
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Answer» Correct Answer - 5 See the structure of the complex . |
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| 246. |
The number of oxygen atoms involved in bonding in the coordination sphere of `[Mg(EDTA)]^(2-)` is |
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Answer» Correct Answer - 4 The four tetraacetate oxygen atoms are involved in coordination. |
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| 247. |
The secondary valency in `[Co(EDTA)]^(2-)` is |
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Answer» Correct Answer - 6 EDTA:Tetravalent hexadentate ligand is 6 |
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| 248. |
The number of nitrogen atoms coordunated in `[Zn(EDTA)]^(-2)` is |
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Answer» Correct Answer - 2 See the structure of the complex . |
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| 249. |
The possible number of stereoismers for the formula `[Ma_(2)b_(2)cd]^(pmn)`. |
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Answer» Correct Answer - 6 Geometrical and optional isomers (3+1) |
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| 250. |
Which of the following complex is an outer orbital complex?A. `[Ni(NH_(3))]^(2+)`B. `[Mn(CN)_(6)^](4-)`C. `[Co(NH_(3))_(6)]^(3+)`D. `[Fe(CN)_(6)]^(4-)` |
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Answer» Correct Answer - A In `[Ni(NH_(3))_(6)]^(+2), Ni^(+2)` has `3d^(8)` electric configuration, `Sp^(3)d^(2)` |
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