InterviewSolution
Saved Bookmarks
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.
| 601. |
Which of the following statements are correct? (i) In octahedral complexes, `d_z2, d_(x^2-y^2)` orbitals have higher energy than `d_(xy)`, `d_(yz)` and `d_(zx)` orbitals. (ii) In tetrahedral complexes, `d_(xy), d_(yz), d_(zx)` orbitals have higher energy than `d_z2` and `d_(x^2-y^2)` orbitals. (iii) The colours of complexes are due to electronic transitions from one set of d-orbitals to another set of orbitals. (iv) `Delta_(tetrahedral)=9/4, Delta_(octahedral)`A. (a) (i), (ii) and (iii)B. (b) (i) and (iv)C. (c) (iii) and (iv)D. (d) (ii), (iii) and (iv) |
|
Answer» Correct Answer - A `Delta_(tetrahedral)=9/4`, `Delta_(octahedral)` |
|
| 602. |
According to the Crystal Field Theory, the energy of `d_(xy)` orbital is lower than `d_(x^(2)-y^(2))` in an octahedral complex becauseA. the `d_(xy)` orbital near the ligandsB. the repulsion between the `d_(xy)` electrons and ligands electrons is less than that between `d_(x^(2)-y^(2))` and ligands electrons.C. the repulsion between the `d_(xy)` electrons and ligands electrons is more than that between `d_(x^(2)-y^(2))` and ligands electrons.D. the `d_(x^(2)-^(2))` orbital is away the ligands. |
| Answer» Correct Answer - B | |
| 603. |
One mole of complex compound `Co(NH_3)_5Cl_3` gives 3 moles of ions on dissolution in water. One mole of same complex reacts with two moles of `AgNO_3` to yield two moles of `AgCl(s)`. The complex is:A. (a) `[Co(NH_3)_4Cl_2]Cl.NH_3`B. (b) `[Co(NH_3)_4Cl]Cl_2.NH_3`C. (c) `[Co(NH_3)_5Cl]Cl_2`D. (d) `[Co(NH_3)_3Cl_3].2NH_3` |
|
Answer» Correct Answer - C `[Co(NH_3)_5Cl]Cl_2overset(H_2O)rarr[Co(NH_3)_5Cl]^++2Cl^-` `2AgNO_3+2Cl^(-)rarr2AgCl+2NO_3^-` |
|
| 604. |
One mole of complex compound `Co(NH_3)_5Cl_3` gives 3 moles of ions on dissolution in water. One mole of same complex reacts with two moles of `AgNO_3` to yield two moles of `AgCl(s)`. The complex is:A. `[Co(NH))_(4)Cl_(2)]Cl.NH_(3)`B. `[Co(NH_(3))_(4)Cl]Cl_(2).NH_(3)`C. `[Co(NH_(3))_(5)Cl]Cl_(2)`D. `[Co(NH_(3))_(3)Cl_(3)].2NH_(3)` |
| Answer» Correct Answer - C | |
| 605. |
One mole of complex compound `Co(NH_3)_5Cl_3` gives 3 moles of ions on dissolution in water. One mole of same complex reacts with two moles of `AgNO_3` to yield two moles of `AgCl(s)`. The complex is:A. `[Co(NH_(3))_(4)Cl]Cl_(2) `B. `[Co(NH_(3))_(4)Cl_(2)].Cl.NH_(3)`C. `[Co(NH_(3))_(3)].2NH_(2) `D. `[Co(NH_(3))_(5) Cl] Cl_(2) ` |
|
Answer» Correct Answer - D `[Co(NH_(3))_(5)]Cl_(2) ` gives 3 mole of ions as `[Co (NH_(3))_(5) Cl]Cl_(2) hArr [Co(NH_(3))_(5)Cl]^(2+) + 2Cl^(-) ` it also gives two moles of AgCl `[Co (NH_(3))_(5)Cl]Cl_(2) +2AgNO_(3)to [Co(NH_(3))_(5)Cl](NO_(3))_(2)+2AgCl` |
|
| 606. |
All the metal ions contain `t_(2g)^(6)e_(g)^(0)` configuaration. Which of the following complex will be paramagnetic ?A. `[FeCl(CN)_(4)(O_(2))]^(4-)`B. `K_(4)[Fe(CN)_(6)]`C. `[C(NH_(3))_(6)]Cl_(3)`D. `[Fe(CN)_(5)(O_(2))]^(-5)` |
| Answer» Correct Answer - A | |
| 607. |
Assertion : According to crystal field theory , during complex formation , the d-orbitals split and form two sets of orbitals `t_(2g)` and `e_(g)` . Reason : Splitting of d-orbitals occurs only in case of strong field ligands .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 |
|
Answer» Correct Answer - C Splitting of orbitals takes place for both weak and strong field ligands. Pairing of electrons in these orbitals depends on the strength of the field . |
|
| 608. |
According to crystal field therory the electronic configuration of the `[Cr(H_(2)O)_(6)]^(2+)` ion when `(Delta ltP)` `(Delta = CFSE, P= "Pairing energy")` .A. `3 (t_(2g)^(3) e_(g)^(1))`B. `4 (t_(2g)^(3) e_(g)^(1))`C. `3(e_(g)^(1) t_(2g)^(1))`D. `3(e_(g)^(3) t_(2g)^(1))` |
|
Answer» Correct Answer - a Octahedralcomplex when `(DeltaltP)` (weak field) (high spin state) (No pairing)` `Cr =3d^(5) 4s^(1)` ,`Cr^(+2) =3d^(4)` :. Structure `= 3(t_(2g)^(2)`e_(g)^(1))` . |
|
| 609. |
`CrCl_(3) * 6H_(2)O` exists in different isomeric forms which show different colours like violet and green . This is due toA. ionisation isomerismB. coordination isomerismC. optical isomerismD. hydrate isomerism |
| Answer» Correct Answer - D | |
| 610. |
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 isomersimB. Solvate isomerismC. Ionisation isomerismD. Coordination isomerism |
|
Answer» Correct Answer - C Solute isomerism to shown when two compounds having same molecular formula differ by whether or solvent molecule is directly bonded to metal ion or is present as free solvent molecules in the crystal lattice. When water is present as solvent and show this type of isomerism then it is known as hydrate isomerism. Coordination compound `[Cr(H_(2)O)_(6)]Cl_(3)` and `[Cr(H_(2)O)_(5)Cl]H_(2)O.Cl_(2)` are solvate isomers, because water is exchanged by chloride ion. this is why both of them show differsent colour on exposure to sunlight. |
|
| 611. |
Stability constant is more for the complex:A. (a) `[Ag(NH_3)_2]^(+)`B. (b) `[Cu(NH_3)_4]^(2+)`C. (c) `[Ag(CN)_2]^(-1)`D. (d) `[Co(NH_3)_6]^(3+)` |
|
Answer» Correct Answer - D Complex will be more stable if higher value of charge density is present. `"Charge density" = "Charge"/ "Radius"` For stability: (i) More basic ligand, then complex will be more stable. (ii) Higher the oxidation state of central atom and higher is its coordination number. (iii) Higher the stability constant (K) `{:(,,[Co(NH_3)_6]^(3+),,[Cu(NH_3)_4]^(2+)),(Stability,,darr,,darr),(const ant(K),,5xx10^(33),,4xx10^(11)),(,,[Ag(NH_3)_2]^(+),,[Ag(CN)_2]^(-1)),(Stabil ty,,darr,,darr),(const ant(K),,1.6xx10^7,,1xx10^(22)):}` |
|
| 612. |
Aqua regia reacts with Pt to yeild:A. (a) `Pt(NO_3)_4`B. (b) `H_2PtCl_6`C. (c) `PtCl_4`D. (d) `PtCl_2` |
|
Answer» Correct Answer - B `3HCl+1HNO_3` both concentrated `3HCl+1HNO_3+PtrarrH_2PtCl_6` |
|
| 613. |
Which one of the following statements is incorrect?A. (a) Greater the stability constant of a complex ion, greater is its stabilityB. (b) Greater the charge on the central metal ion, greater is the stability of the complexC. (c) Greater the basic character of the ligard, the greater is the stability of the complexD. (d) Complexes have low stability constants. |
|
Answer» Correct Answer - D Factual |
|
| 614. |
Which of the following observations/statements is/are correct?A. (a) Anhydrous `CuSO_4` becomes blue in aqueous medium due to the complex formationB. (b) `Ni(CN)_2` dissolves in KCN giving an orange-red solutionC. (c) `Fe(OH)_3` can be precipitated by adding `NH_4OH` to `K_3[Fe(CN)_6]`D. (d) None of the above |
|
Answer» Correct Answer - A,B Anhydrous `CuSO_4` become blue in aqueous medium due to the complex formation. `CuSO_4+4NH_3rarr[Cu(NH_3)_4]^(+2)` |
|
| 615. |
The equation which is balanced and represents the correct product(s) is .A. (a) `Li_2O+2KClrarr2LiCl+K_2O`B. (b) `[CoCl(NH_3)_5]^(+) + 5H^(+)rarrCO^(2+)+5NH_4^(+)+Cl^(-)`C. (c) `[Mg(H_2O)_6]^(2+)+(EDTA)^(4-)overset(excess NaOH)rarr[Mg(EDTA)^(2+)]+6H_2O`D. (d) `CuSO_4+4KCNrarrK_2[Cu(CN)_4]+K_2SO_4` |
|
Answer» Correct Answer - B (a) `Li_2O+2KClrarr2LiCl+K_2O` The above equation is incorrect because amine a stronger base cannot be generated by a weaker base, `Li_2O`. (b) `[CoCl(NH_3)_5]^(+)+ 5H^(+)rarrCO^(2+)+5NH_4^+ + O^(-4)` The above equation is correct because amine complexes decompose under acidic medium. Thus, the complex `[CoCl(NH_3)_5]` decomposes under acidic conditions to give ammonium ions. (c) `[Mg(H_2O)_6]^(2+)+(EDTA)^(4-)overset(excess NaOH)rarr[Mg(EDTA)^(2+)+6H_2O` The above equation is incorrect because the product formed would be `[Mg(EDTA)]^(2-)`. (d) `CuSO_4+4KCNrarrK_2[Cu(CN)_4+K_2SO_4` The above equation is incorrect. Thus, the correct equation is `2KCN+CuSO_4rarrK_2SO_4+Cu+(CN)_2` (Cyanogen gas) |
|
| 616. |
What is the structural formula of lithium tetrahydrido aluminateA. `[Al[LiH_(4)]`B. `Al_(2) [LiH_(4)]_(3)`C. `Li [AIH_(4)]`D. `Li [AiH_(4)]_(2) ` |
|
Answer» Correct Answer - C `Li (AIH_(4))]` is called lithium tetrahydridro aluminate . It is an important reducing agent . |
|
| 617. |
In `Fe(CO)_5`, the `Fe-C` bond possesses:A. (a) `pi`-character onlyB. (b) Both `sigma` and `pi` charactersC. (c) Ionic characterD. (d) `sigma`-character only |
|
Answer» Correct Answer - B Metal-carbon bond in metal carbonyls has `sigma` as well as `pi` characters. |
|
| 618. |
In `Fe(CO)_(5) .` the Fe- C bond possessesA. `pi`- character onlyB. both `sigma and pi` charactersC. ionic characterD. `sigma `- character only |
|
Answer» Correct Answer - B Metal carbonyl organimetallic compounds possess both ` sigma and pi` characters. |
|
| 619. |
Ziegler-Natta catal,yst, catalyese the polymerisation of ------ at atmospheric pressure and ambient temperature.A. alkynesB. alkenesC. arenesD. All of these |
|
Answer» Correct Answer - B Solutions of `A1(C_(2)H_(5))_(3)` and `TiC1_(4)` hydrocarbon solvent react exothermically to form a brown solid. This is the important Ziegler-Natta catalyst for polymerizing ethene (ethylene) to foem polythene. |
|
| 620. |
An aqueous solution containing 1 mol of `HgI_(2)` and `2mol` of Nal is orange in colour. On addition of excess NaI the solution becomes colourless The orange colour reappears on subsequent addition of Na `OCI` Explain with equations . |
|
Answer» `HI_(2)` has orange/scarlet colour It issolves in sodium iodide due to the formation of complex `HgI_(2) + 2NaI rarr Na_(2) HgI_(4)` With `NaOCI` again a precipitate of `HgI_(2)` is formed `3Na_(2)HgI_(4) +2NaOCI+2H_(2)O` `rarr 3HgI_(2) +2NAI_(3) + 4NaOH + 2NaCI` . |
|
| 621. |
Which of the following comolexes wll give white precipiltate with `BaCI_(2)` solution ?A. `[Cr(NH_(3))_(5)SO_(4)]CI`B. `[Co(NH_(3))_(4)CI_(2)[ NO_(2)`C. `[Cr(NH_(3))_(5)CI]SO_(4)`D. Both (a) and (c) |
|
Answer» (c) Only `[Cr(NH_(3))_(5)CI] SO_(4)` gives sulphate ion. `[Cr(NH_(3))_(5)CI]SO_(4)+BaCI_(2)rarr[Cr(NH_(3))_(5)CI]CI_(2)BaSO_(4).` |
|
| 622. |
`EAN` rule is followed by `K_(4)Fe(CN)_(6)` complex .A. 36B. 34C. 38D. 40 |
|
Answer» Correct Answer - 1 EAN( effective atomic number `) =` Atomic number of central metal atom- oxidation number of metal `+` number of electron gained from ligand. ln `K_(4)[Fe(CN)_(6)], number of ligands `=6` and each ligand donates two electrons to `Fe EAN=26-2+2xx6=36`. |
|
| 623. |
`EAN` rule is followed by `K_(4)Fe(CN)_(6)` complex . |
| Answer» Correct Answer - T | |
| 624. |
Which of the following is correct IUPAC name for `K_(2)[Co(CN)_(2)O_(2)(O)_(2)NH_(3)]`A. Potassium amminecyanoperoxobioxo-chromatic (IV)B. Potassium amminecyanoperoxobioxo-chromatic (V)C. Potassium amminecyanoperoxobioxo-chromatic (VI)D. Potassium amminedicyanoperoxobioxper-oxochromate (VI) |
| Answer» (d) The IUPAC name `K_(2)[Cr(CN)_(2)O_(2)(O)_(2)(NH_(3))]` is potassium amminedicyanodioxoper-oxochromate (VI) | |
| 625. |
Ferrocene is an examle ofA. sandwiched comlexB. pi bonded complexC. a complexin which all the five carbon atoms of cyclopentadiene anion are bonded to the metalD. Alll of the above |
|
Answer» (d) Ferrocene is a sandwich complex compound in which all the five carbon atoms of cyclopentadiene anion are linked to the metal throught pi-bonds. `[Fe(eta^(5)-C_(5)H_(5))_(2)]` Ferrocene`rarr` it has aromatic character. |
|
| 626. |
EAN of iron in `K_(4)[Fe(CN)_(6)]` isA. 36B. 34C. 38D. 40 |
| Answer» (a) `EAN=z-x+2c=26-2+2xx6=36` | |
| 627. |
High spin complex `[FeCI_(6)]^(3-)` has th d-configurationA. `t_(2g)^(3)" " theta_(g)^(2)`B. `t_(2g)^(5)`C. `t_(2g)^(2)" " theta_(g)^(3)`D. `e_(g)^(5)` |
| Answer» (a) In `[FeCI_(6)]^(3-)` complex , `CI^(-)` is weak field ligand It do not cause pairing of electron in 3 d subshell of `Fe^(3+)` Hence, configuration is `t_(2g)^(3) e_(g)^(2)` | |
| 628. |
Which of the following orders is incorrect for the properties indicated against each ?A. `[Cr(NH_(3))_(6)]^(3+) gt [Mn(CN)_(6)]^(3-) gt [V(CO)_(6)]" "-` magnetic moment (spin only values in B.M.)B. `[Co(CN)_(6)]^(3-) gt [Co(NH_(3))_(6)]^(3+) gt [Co(H_(2)O)_(6)]^(3+)" "-Delta_(0)` valuesC. `[Ni(CO)_(4)] gt [Co(CO)_(4)]^(-) gt [Fe(CO)_(4)]^(2-)" "-` strength of `M-Cpi` bond.D. `[Fe(CN)_(6)]^(3-) lt [Co(CN)_(6)]^(4-) lt [Ni(NH_(3))_(6)]^(2+)" "-` effective atomic number of metal ion. |
|
Answer» Correct Answer - C `(1)Cr^(3+)-3d^(3)` configuration `(t_(2g)^(1,1,1).e_(g)^(0,0)),Mn^(3+)-3d^(4)` configuration `(t_(2g)^(2,1,1).e_(g)^(0,0)),(V)-3d^(5)` configuration `(t_(2g)^(2,2,1).e_(g)^(0,0))` `(2)Delta_(0)prop` strength of ligand for same oxidation state of central meta. `(3)` In carbonylate anion, the metal has a greater electron density to be dispersed, with the result that `M-Cpi` `(4)` `[Fe^(III)(CN)_(6)]^(3-),EAN=23+12=35` `[Co^(II)(CN)_(6)]^(4-),EAN=25+12=37` `[Ni(NH_(3))_(6)]^(2-),EAN=26+12=38` |
|
| 629. |
How many isomers are possible for the complex `[Co(en)_(2)Cl_(2)]`(en=ethylene diamine )A. 4B. 2C. 6D. 3 |
| Answer» Correct Answer - D | |
| 630. |
The highest molar conductivity will be exhibited by the complex .A. `[Cr(NH_(3))_(6)]Cl_(3)`B. `[Cr(NH_(3))_(6)Cl]Cl_(2)`C. `[Cr(NH_(3))_(6)Cl_(2)]Cl`D. `[Cr(NH_(3))_(6)Cl_(3)]` |
| Answer» Correct Answer - A | |
| 631. |
Which of the following has the highest molar conductivity in solution?A. (a) `[Pt(NH_3)_6]Cl_4`B. (b) `[Pt(NH_3)_5Cl]Cl_3`C. (c) `[Pt(NH_3)_4Cl_2]Cl_2`D. (d) `[Pt(NH_3)_3Cl_3]Cl` |
|
Answer» Correct Answer - A It has maximum no. of ions. |
|
| 632. |
Which is a pair of ambidentate ligands among the following?A. (a) `CN^(-), NO_2^(-)`B. (b) `NO_3^(-), NO_2^(-)`C. (c) `CNS^(-), C_2O_4^(-2)`D. (d) `C_2O_4^(-2), SO_4^(-2)` |
|
Answer» Correct Answer - A `CN^-` and `NO_2^-` are ambidentate ligands. |
|
| 633. |
The oxidation number of Co in the complex ion `[CoCl(NH_3)_5]^(2+)` is:A. (a) `+2`B. (b) `+3`C. (c) `+4`D. (d) `+6` |
|
Answer» Correct Answer - B `[CoCl(NH_3)_5]^(2+)` `x+(-1)+5(0)=2` `x=+3` |
|
| 634. |
Which kind of isomerism is shown by `Co (NH_(3))_(4) Br_(2) Cl` ?A. Geometrical and ionisationB. Optical and ionisationC. Geometrical and opticalD. Geometrical only |
|
Answer» Correct Answer - A |
|
| 635. |
The compound(s) that exhibits(s) geometrical isomerism is/areA. `[Pt(en)Cl_(2)]`B. `[Pt (en)_(2)]Cl_(2)`C. `[Pt (en)_(2) Cl_(2)]Cl_(2)`D. `[Pt (NH_(3))_(2) Cl_(2)]` |
|
Answer» Correct Answer - C::D |
|
| 636. |
The pair of coordination complex exhibiting the same kind of isomerism is .A. `[Cr(NH_(3))_(5) Cl] Cl_(2)` and `[Cr(NH_(3))_(4) Cl_(2)] Cl`B. `[Co(NH_(3))_(4) Cl_(2)]^(+)` and `[Pt (NH_(3))_(2) (H_(2)O) Cl]^(+)`C. `[CoBr_(2)Cl_(2)]^(2-)` and `[Pt Br_(2) Cl_(2)]^(2-)`D. `[Pt (NH_(3))_(3) (NO_(3))] Cl` and `[Pt (NH_(3))_(3) Cl]Br` |
|
Answer» Correct Answer - B::D |
|
| 637. |
Which of the following has a square planar geometry? .A. `[PtCl_(4)]^(2-)`B. `[CoCl_(4)]^(2-)`C. `[FeCl_(4)]^(2-)`D. `[Ni(CN)_(4)]^(2-)` |
| Answer» Correct Answer - A | |
| 638. |
Among `[Ni(CO)_(4)],[Ni(CN)_(4)]^(2-)` and `[NiBr_(4)]^(2-)` species, the hybridisation state of `Ni` atoms are respectively .A. `sp^(3),ds^(2)p,dsp^(2)`B. `sp^(3),dsp^(2),sp^(3)`C. `dsp^(2),sp^(3),sp^(3)`D. `sp^(3),sp^(3),dsp^(2)` |
|
Answer» Correct Answer - B Ni shows `sp^(3) and `dsp^(2)` - hybrisation in `Ni(CO)_(4)[NiCI_(4)]^(2-)` and `[Ni(CN)_(4)]^(2-)` respectively `CN^(Θ)` being strong field ligan pairs up unpaired electron in `Ni^(2+)` . |
|
| 639. |
A substance which is not paramagnetic is .A. `Cr(CIO_(4))_(3)`B. `KMnO_(4)`C. `TiCI_(3)`D. `VOBr_(2)` |
|
Answer» Correct Answer - B `Mn(Z =25),implies3d^(5) 4s^(2) MnO_(4) ^(Θ) , Mn^(7+) = 3d^(0) 4s^(0)` . |
|
| 640. |
Coordination compounds plays many important roles in animals and plants. The are essential in the storage and transport of oxygen as electrons transfer agents as catalysts and in photosynthesis Wide range of application in daily life takes place through formation of complexes Photographic fixing qualitative and quantitative analysis purification of water metallurgical extraction are some specific worth mentioningArrange of the following in order of decreasing number of unpaired electrons (I) `[Fe(H_(2)O))_(6)]^(2+)` (II) `[Fe(CN)_(6)]^(3-)` (III) `[Fe(CN)_(6)]^(4-)` (IV) `[fe(H_(2)O)_(6)]^(3+)` (a) IV,I,II,III (b) `I,II,III,IV` (c) `III,II,IIV` (d) II,III,I,IV` .A. `IV,I,II,III`B. `I,II,III,IV`C. `III,II,I,IV`D. `II,III,I,IV` |
| Answer» Correct Answer - A | |
| 641. |
Coordination compounds plays many important roles in animals and plants. The are essential in the storage and transport of oxygen as electrons transfer agents as catalysts and in photosynthesis Wide range of application in daily life takes place through formation of complexes Photographic fixing qualitative and quantitative analysis purification of water metallurgical extraction are some specific worth mentioning`Cu^(2+)` and `Cd^(2+)` both are precipitated as sulphides on passing `H_(2)S` gas in dil `HCI` medium However, precipitation of `Cu^(2+)` is prevented by (a) Adding excess of `K_(4)[Fe(CN)_(6)]` when `Cd^(2+)` is only precipitated (b) Adding excess of `KNC` when `Cu^(2+)` for stable complex `[Cu(CN)_(4)]^(3-)` and `Cd^(2+)` forms unstable complex `[Cd(CN)_(4)]^(2-)` (c ) All of the above |
| Answer» Correct Answer - B | |
| 642. |
Coordination compounds plays many important roles in animals and plants. The are essential in the storage and transport of oxygen as electrons transfer agents as catalysts and in photosynthesis Wide range of application in daily life takes place through formation of complexes Photographic fixing qualitative and quantitative analysis purification of water metallurgical extraction are some specific worth mentioning Extraction of Ag from sulphide ore and removal of unreacted silver from photographic plate involve complexes: (a) `[Ag(S_(2)O_(3))_(2)]^(3-)` ion both (b) `[Ag(CN)_(2)]^(Θ)` in both (c) `[Ag(S_(2)O_(3))]^(3-) , [Ag(CN)_(2)]^(Θ)` (d) `[Ag(CN)_(2)]^(Θ)`,[Ag_(2)(S_(2)O_(3))_(2)]^(3-)` . |
| Answer» Correct Answer - D | |
| 643. |
Which of the following complex ion`(s)` is//are not expected to sbsorb visible light?A. `a.[Ti(en)_(2)(NH_(3))_(2)]^(4+)`B. `b.[Cr(NH_(3))_(6)]^(3+)`C. `c.[Zn(NH_(3))_(6)]^(2+)`D. `d.[Sc(H_(2)O)_(3)(NH_(3))_(3)]^(3+)` |
| Answer» Correct Answer - A::C::D | |
| 644. |
Which of the following molecules`(s)is//are` not showing optical isomerism ? .A. `a.[Co(NH_(3))_(3)Cl]^(o+)`B. `b.[Cr(H_(2)O)_(6)]^(3+)`C. `c.[Zn(NH_(3))_(6)]^(2+)`D. `d.[Sc(H_(2)O)_(3)(NH_(3))_(3)]^(3+)` |
| Answer» Correct Answer - A::B::C | |
| 645. |
In `[Co(C_(2)O_(4))_(3)]^(3-)`, the isomerism shown is .A. LigandB. OpticalC. GeometricalD. Ionisation |
| Answer» Correct Answer - B | |
| 646. |
Which of the following statement(s) is//are correct?A. a.The complexes `[NiCl_(4)]^(2-)` and `[Ni(CN)_(4)]^(2-)`differ in state of hybridisation of nickyl .B. b.The complexes`[NiCl_(4)]^(2-)` and `[Ni(CN)_(4)]^(2-)` differ in geometry .C. c.The complexes `[NiCl_(4)]^(2-)` and `[Ni(CN)_(4)]^(2-)` differ in the magnetic properties .D. d.The complexes`[NiCl_(4)]^(2-)` and `[Ni(CN)_(4)]^(2-)` differ in primary valencies of nickel . |
| Answer» Correct Answer - A::B::C | |
| 647. |
Both geometrical and optical isomerisms are not shown byA. a.`[Co(en)_(2)Cl_(2)]^(o+)`B. b.`[Co(NH_(3))_(2)Cl_(4)]^(-)`C. c.`[Co(C_(2)O_(4))_(3)]^(3-)`D. d.`[Co(NH_(3))_(4)Cl_(2)]^(o+)` |
| Answer» Correct Answer - A | |
| 648. |
Both geometrical and optical isomerisms are not shown byA. a.dibromidobis (ethylenediamine)cobalt(III)ionB. b.tetraamminedibromido cobalt(III)ionC. c.tetraamminedibromido cobalt(III) ionD. d.trioxalatochromate(III)ion |
| Answer» Correct Answer - B::C::D | |
| 649. |
Select the incorrect statement ?A. `Ag^(+)` ions with an excess of a solution containing `CN^(-)` ions form a complex having coordination number two.B. `PtCl_(3)(n^(2)-C_(2)H_(4))`, an organometallic compound is `sigma` and `pi` bonded.C. Vitamin `B_(12)` is a coordination compound of cobalt.D. `RhCl(PPh_(3))_(3)`, a Wilkinson catalyst has `sp^(3)` hybridisation and is used for the hydrogenation of alkenes. |
|
Answer» Correct Answer - D `[Rh(I)Cl(PPh_(3))_(3)]` has `4d^(8)`configuration. This configuration compels for the pairing of electrons leading to one orbital vacant for `dsp^(2)` hybridisation on amount of higher CFSE . It is square planar and diamagnetic. |
|
| 650. |
The correct order for the wavelengths of absorption in the visible region for the following `:` `underset((1))([Ni(NO_(2))_(6)]^(4-))," "underset((II))([Ni(NH_(3))_(6)]^(2+))," "underset((III))([Ni(H_(2)O)_(6)]^(2+))," "underset((IV))([NIF_(6)]^(4-))`A. `IV gt III gt II gt I`B. `I gt II gt III gt IV`C. `III gt IV gt II gt I`D. `II gt III gt I gt IV` |
|
Answer» Correct Answer - 1 The order of the ligand in the spectrochemical series `:` `F lt H_(2)O lt NH_(3) lt NO_(2)` Hence the wavelength of the light observed will be in the order `:` `[NiF_(6)]^(4-) lt [Ni(H_(2)O)_(6)]^(2+) lt [Ni(NH_(3))_(6)]^(42+) lt [Ni(NO_(2))_(6)]^(4-)` Thus, wavelength absorbed `[E=(hc)/(lambda)]` will be in the opposite order. |
|