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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.
| 701. |
STATEMENT-1: `CN^(-)` may act as bridging ligand . and STATEMENT-2: Lone pair resides on carbon as well as on nitrogen .A. Statement-1 is True , Statement-2 is True , Statement-2 is a correct explanation for Statement-1B. Statement-1 is True , Statement-2 is True , Statement-2 is NOT a correct explanation for Statement-1C. Statement-1 is True , Statement-2 is FalseD. Statement-1 is False , Statement-2 is True |
| Answer» Correct Answer - B | |
| 702. |
Write the IUPAC names of the following coordinates compounds : (1) `[Co(NH_(3))_(5)Cl]Cl_(2)` (2) `K_(2)[PdCl_(4)]` (3) `[Cr(H_(2)O)_(4)Cl_(2)]^(+)` (4) `K_(3)[Fe(CN)_(5)NO]` |
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Answer» Follow the rules step-by-step. (1) Pentamminechloridocobalt (III) chloride (2) Potassium tetrachloridopalladate (II) (3) Tetraquadichloridochromium (III) ion (4) Potassium pentachyanonitrosyliumferrate (I) |
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| 703. |
STATEMENT-1: `Co(NH_(3))_(6)^(+3)` is more stable than `(Co(en)_(2)(NH_(3))_(2))^(+3)` and STATEMENT-2: Chelation is more in `[Co(en)_(2)(NH_(3))_(2)]^(+3)` than `[Co(NH_(3))_(6)]^(+3)`A. Statement-1 is True , Statement-2 is True , Statement-2 is a correct explanation for Statement-1B. Statement-1 is True , Statement-2 is True , Statement-2 is NOT a correct explanation for Statement-1C. Statement-1 is True , Statement-2 is FalseD. Statement-1 is False , Statement-2 is True |
| Answer» Correct Answer - D | |
| 704. |
Write the IUPAC names of the following coordiantion compounds: (i) `[Co(NH_(3))_(6)]Cl_(3)` (ii) `[Co(NH_(3))_(5)Cl]Cl_(2)` (iii) `K_(3)[Fe(CN)_(6)]` (iv) `K_(3)[Fe(C_(2)O_(4))_(3)]` (v) `K_(2)[Pd Cl_(4)]` (vi) `[Pt(NH_(3))_(2)Cl(NH_(2)CH_(3))]Cl` |
| Answer» (i) Hexaamminecobalt(III) chloride(ii) Pentaamminechloridocobalt(III) chloride(iii) Potassium hexacyanidoferrate(III)(iv) Potassium trioxalatoferrate(III)(v) Potassium tetrachloridopalladate(II)(vi) Diamminechlorido(methanamine)platinum(II) chloride | |
| 705. |
Which of the following ligands will not show chelation ?A. EDTAB. DMGC. Ethane-1, 2- diamineD. `SCN^(-)` |
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Answer» Correct Answer - D `SCN^(-)` is a monodentate ligand hence cannot show chelation . |
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| 706. |
The charges x and y on the following ions are `(i) [Co(NH_(3))_(2) Cl_(4)]^(x) " " (ii) [Fe(CN)_(6)]^(y)` (Oxidation state of Co is +3 and Fe is + 2 in their respective complexes.)A. x = + 1 , y = - 1B. x = -1 , y = + 3C. x = -1 , y = -4D. x = -2 , y = -3 |
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Answer» Correct Answer - C In `[Co(NH_(3))_(2) Cl_(4)]^(x)` , oxidation state of Co = + 3 Hence , x = `+ 3 + 2 xx 0 + 4 xx (-1) = -1` In `[Fe(CN)_(6)]^(y)` , oxidation state is the residual charge on the central metal atom left after removing all ions . |
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| 707. |
A list of species having the formula of `XZ_(4)` is given below `XeF_(4), SF_(4), SiF_(4), BF_(4)^(-), BrF_(4)^(-), [Cu(NH_(3))4]^(2+),[FeCl_(4)]^(2-), [CoCl_(4)]^(2-)` and `[PtCl_(4)]^(2-)` Defining shape on the basis of the locatiion of `X` and `Z` atoms, the total number of species having a square planar shape is |
| Answer» Correct Answer - 4 | |
| 708. |
These questions consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: `[Al(H_2O)_6]^(3+)` is a stronger acid than `[Mg(H_2O)_6]^(2+)`. Reason: Size of `[Al(H_2O)_6]^(3+)` is smaller than `[Mg(H_2O)_6]^(2+)` and posseses more effective nuclear charge.A. (a) If both the assertion and reason are true and reason is a true explanation of the assertion.B. (b) If both the assertion and reason are true but the reason is not the correct explanation of assertion.C. (c) If the assertion is true but reason is false.D. (d) If assertion is false but reason is true. |
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Answer» Correct Answer - A Both assertion and reason are true and the reason is the correct explanation of the assertion. |
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| 709. |
These questions consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: `[Ti(H_2O)_6]^(3+)` is coloured while `[Sc(H_2O)_6]^(3+)` is colourless. Reason: d-d transition is not possible in `[Sc(H_2O)_6]^(3+)`.A. (a) If both assertion and reason are true and the reason are true and reason is the correct explanation of the assertion.B. (b) If both assertion and reason are true and reason is not the correct explanation of the assertion.C. (c) If assertion is true but reason is false.D. (d) If assertion is false but reason is true. |
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Answer» Correct Answer - A Both assertion and reason are true and reason is the correct explanation of assertion. `[Sc(H_2O)_6]^(3+)` has no unpaired electron in its d subshell and thus d-d transition is not possible whereas `[Ti(H_2O)_6]^(3+)` has one unpaired electron in its d subshell which gives rise to `d-d` transition to impart colour. |
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| 710. |
These questions consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: The number of unpaired electrons present in `[CuCl_2]^(-)` complex is zero. Reason: The complex is linear in the solid state with sp-hybridization.A. (a) If both assertion and reason are true and the reason are true and reason is the correct explanation of the assertion.B. (b) If both assertion and reason are true and reason is not the correct explanation of the assertion.C. (c) If assertion is true but reason is false.D. (d) If assertion is false but reason is true. |
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Answer» Correct Answer - C Correction Reason: The complex, `[CuCl_2]^(-)` (as well as `[CuCl_3]^(2-)` and `[CuCl_4]^(2-)` are tetrahedral in the solid state. In `KCuCl_2`, there are chains in which `Cu` is tetrahedrally surrounded by Cl with simple units joined into a chain by shared halide ions. |
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| 711. |
These questions consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: The geometrical isomers of the complex `[M(NH_3)_4Cl_2]` are optically inactive. Reason: Both geometrical isomer of the complex `[M(NH_3)_4Cl_2]` possess axis of symmetry.A. (a) If both the assertion and reason are true and reason is a true explanation of the assertion.B. (b) If both the assertion and reason are true but the reason is not the correct explanation of assertion.C. (c) If the assertion is true but reason is false.D. (d) If assertion is false but reason is true. |
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Answer» Correct Answer - A Both assertion and reason are true and the reason is the correct explanation of the assertion. |
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| 712. |
These questions consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: `[Ti(H_2O)_6]^(3+)` is coloured while `[Sc(H_2O)_6]^(3+)` is colourless. Reason: d-d transition is not possible in `[Sc(H_2O)_6]^(3+)`.A. (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.B. (b) If both assertion and reason are true but reason is not the correct explanation of the assertion.C. (c) If assertion is true but reason is false.D. (d) If assertion is false but reason is true. |
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Answer» Correct Answer - A Both assertion and reason are true and the reason is the correct explanation of the assertion. |
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| 713. |
Which of the following will show optical isomerism? .A. (a) `[Cu(NH_3)_4]^(2+)`B. (b) `[ZnCl_4]^(2-)`C. (c) `[Cr(C_2O_4)_3]^(3-)`D. (d) `[Co(CN)_6]^(3-)` |
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Answer» Correct Answer - C Optical isomerism is very common in octahedral complexes having general formula `[A_(A_2B_2C_2)]^(n-)`, `[M_((A A)_3)]^(n-)`, `[M_((A A)_2AB)]^(n-)` and `[M_((AB)_3)]^(n-)` where A A is symmetrical bidenate ligand like `underset(COO^-)underset(|)(COO)^-` and AB is unsymmetrical bidentate ligand. |
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| 714. |
The correct order of magnetic moments (spin values in B.M.) among is:A. `Fe(CN)_(6)^(4-) gt [Co(Cl_(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-)` |
| Answer» Correct Answer - D | |
| 715. |
Which of the following complex is an outer orbital complex?A. (a) `[Co(CH_3)_6]^(3+)`B. (b) `[Mn(CN)_6]^(4-)`C. (c) `[Fe(CN)_6]^(4-)`D. (d) `[Ni(NH_3)_6]^(2+)` |
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Answer» Correct Answer - D `{:("Complex ion",,,"Hybridiidization of central atom",),([Fe(CN)_6]^(4-),,,d^2sp^3(i n n er),),([Mn(CN)_6]^(4-),,,d^2sp^3(i n n er),),([Co(NH_3)_6]^(3+),,,d^2sp^3(i n n er),),([Ni(NH_3)_6]^(2+),,,sp^3d^2(outer),):}` |
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| 716. |
The question consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: `[Fe(H_2O)_5NO]SO_4` is paramagnetic. Reason: The `Fe` in `[Fe(H_2O)_5NO]SO_4` has three unpaired electrons.A. (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.B. (b) If both assertion and reason are true but reason is not the correct explanation of the assertion.C. (c) If assertion is true but reason is false.D. (d) If assertion is false but reason is true. |
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Answer» Correct Answer - A Iron in `[Fe(H_2O)_5NO]SO_4` exists in `+2` oxidation state having electronic configuration `(3d)^6`. The unpaired electron of `NO` is shifted to `Fe^(2+)` changing it to `Fe^(+)` and also changes NO to `NO^(+)`. The electronic configuration of iron in the complex thus becomes `(3d)^7` with three unpaired electrons as in the complex, `sp^3d^2`-hybridization exists. |
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| 717. |
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(PhR_(3))_(2)H(CO)]^(2+)`D. `[Ru(NH_(3))_(4)Cl_(2)]^(+)` |
| Answer» Correct Answer - A | |
| 718. |
Which one of the following has largest number of isomers?A. `[Ru(NH_(3))_(4)Cl_(2)]^(+)`B. `[Cu (NH_(3))_(5) Cl]^(2+)`C. `[Ir (PR_(3))_(2)H(CO)]^(2+)`D. `[Co(en)_(2)Cl_(2)]^(+)` |
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Answer» Correct Answer - D `[Co(en)_(2) Cl_(2)]^(+)` forms optical and geometrical isomers. |
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| 719. |
Which of the following has the largest number of isomers? .A. (a) `[Co(en)_2Cl_2]^(+)`B. (b) `[Co(NH_3)_5Cl]^(2+)`C. (c) `[Ir(PR_3)_2H(CO)]^(2+)`D. (d) `[Ru(NH_3)_4Cl_2]^(+)` |
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Answer» Correct Answer - A `[Co(en)_2Cl_2]^(+)` shows geometrical as well as optical isomerism. |
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| 720. |
Which of the following has the largest number of isomers? .A. (a) `[Ir(PP_3)_2H(CO)]^(2+)`B. (b) `[Co(NH_3)_5Cl]^(2+)`C. (c) `[Ru(NH_3)_4Cl_2]^(+)`D. (d) `[Co(en)_2Cl_2]^(+)` |
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Answer» Correct Answer - D `[Co(en)^2Cl_2]^(+)` shows geometrical as well as optical isomerism. |
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| 721. |
The question consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: Coordination entities with `d^4` to `d^7` ions are stable for high spin state. Reason: If `Delta_ogtP`, high state is more stable.A. (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.B. (b) If both assertion and reason are true but reason is not the correct explanation of the assertion.C. (c) If assertion is true but reason is false.D. (d) If assertion is false but reason is true. |
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Answer» Correct Answer - D Correct Assertion: Coordination entities with `d^4` to `d^4` ions are more stable for low spin state. |
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| 722. |
Which of the following has the largest number of isomers? .A. a.`[Cr(en)_(2)Cl_(2)]^(o+)`B. b.`[Cr(NH_(3))_(5)Cl]^(2+)`C. c.`[Ru(NH_(3))_(4)Cl_(2)]^(o+)`D. d.`[Ir(PR_(3))_(2)(CO)_(2)]^(2+)` |
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Answer» Correct Answer - A `Co(en)_(2)CI_(2)]^(o+)` shows geometrical as well as optical isomerism . |
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| 723. |
The question consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: `K_2[Ni(EDTA)]` is more stable than `K_3[Al(C_2O_4)_3]`. Reason: Nickel `(Ni)` is a transition element while aluminium `(Al)` is non-transition element.A. (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.B. (b) If both assertion and reason are true but reason is not the correct explanation of the assertion.C. (c) If assertion is true but reason is false.D. (d) If assertion is false but reason is true. |
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Answer» Correct Answer - B Both assertion and reason are true but the greater stability is due to greater number of chelate ring (five) formed by EDTA than by oxalate. |
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| 724. |
The question consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: `Co(NH_3)_2Cl_2` gives white precipitate with `AgNO_3` solution. Reason: Chlorine is not present in the ionising sphere.A. (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.B. (b) If both assertion and reason are true but reason is not the correct explanation of the assertion.C. (c) If assertion is true but reason is false.D. (d) If assertion is false but reason is true. |
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Answer» Correct Answer - C Correct Reason: As the complex gives white precipitate with `AgNO_3`, one Cl must be present in the ionising sphere. |
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| 725. |
The question consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: Ambidentate ligands lead to linkage isomerism. Reason: The ionization sphere is different in different linkage isomers.A. (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.B. (b) If both assertion and reason are true but reason is not the correct explanation of the assertion.C. (c) If assertion is true but reason is false.D. (d) If assertion is false but reason is true. |
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Answer» Correct Answer - C Correct Reason: The donor atom linking to the central metal atom is different in different linkage isomers. |
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| 726. |
The two compounds `[Co(SO_(4))(NH_(3))_(5)]Br` and `[Co(SO_(4))(NH_(3))_(5)]Cl` represent:A. linkage isomerismB. ionisation isomerismC. Coordination isomerismD. no isomerism |
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Answer» Correct Answer - D Compounds having same molecular formula but different structural formula are known as isomers. `[Co(SO_(4))_(2) (NH_(3))_(5)]Br` and `[Co(SO_(4)) (NH_(3))_(5)]Cl` have not same molecular formula. Hence, they are not isomers. |
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| 727. |
The Type of isomerism present in pentaammine nitro chromium(III) perchlorate is .A. OpticalB. LinkageC. HydrateD. Polymerisation |
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Answer» Correct Answer - B The -`NO_(2) `group can show `-NO_(2)`(nitro) or `-ONO` (nitrito) linkage with metal . |
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| 728. |
The question consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: The complex `[Co(NH_3)_3Cl_3]` does not give precipitate with `AgNO_3`. Reason: The given complex does not contain counter ions.A. (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.B. (b) If both assertion and reason are true but reason is not the correct explanation of the assertion.C. (c) If assertion is true but reason is false.D. (d) If assertion is false but reason is true. |
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Answer» Correct Answer - A Reason is the correct explanation of assertion (The complex is non-ionic and does not contain ionizable `Cl^(-)` ions). |
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| 729. |
The question consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: `NF_3` is weaker ligand than `N(CH_3)_3`. Reason: `NF_3` ionizes to give `F^(-)` ions in aqueous solution.A. (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.B. (b) If both assertion and reason are true but reason is not the correct explanation of the assertion.C. (c) If assertion is true but reason is false.D. (d) If assertion is false but reason is true. |
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Answer» Correct Answer - A Correct Reason: F is highly electronegative. It attracts the electrons of N towards itself and hence are not easily available on N, making it a weaker donor or ligand. |
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| 730. |
Describe a simple test to distinguish between the following pairs of compounds (i) (A) `[Co(NH_(3))_(5)Br]SO_(4)` and (B) `[Co(NH_(3))_(5)SO_(4)]Br` (ii) (A) `[Cr(H_(2)O)_(6)]CI_(3)` and `(B) [Cr (H_(2)O)_(5)CI] CI_(2)H_(2)O` (iii) (A) `cis [PtCI_(2)(NH_(3))_(2)]` and (B) trans `[Pt CI_(2)(NH_(3))_(2)]` (iv) (A) and (B) Two enantiomers of `[Co(en)_(2)(NH_(3))_(2)]` (V) (A) (A) `[Cr (NH_(3))_(6)][Cr(NH_(3))_(2)(NO_(2))_(4)]` (vi) (A) `[Pt(NH_(3))_(2)CI_(2)]` and (B) `[Pt(NH_(3))_(6)]CI_(2)` (vii) (A) `[Co(NH_(3))_(5)CI]SO_(4)` and (B) `[Co(NH_(3))_(5)SO_(4)]CI` . |
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Answer» (A) and (B) are distinguished by qualitative method (A) give white precipitate of `BaSO_(4)` with `BaCI_(2)` solution due to the presence of `SO^(2-)_(4)` as counter ion (B) gives pale yellow precipitate of AgBr `("partially soluble in" NH_(4)OH)` with `AgHO_(3)` solution due to the presence of `Br^(Θ)` ion as counter ion (ii) (A) and (B) are distinguished by conductance method (A) give 4 ions with high charge whereas (B) gives 3 ions with low in aqueous solution as show `Ararr underset(4 ionss (+3)` and-(3)char g e)(ubrace([Cr(H_(2)O)_(6)]^(3+)+3CI^(Θ)` `Brarr underset(4 ionss (+2 and-2)char g e)(ubrace([Cr(H_(2)O)_(5)]^(2+)+2CI^(Θ))` So conductance of (A) will be higher than that of B Further (A) and (B) are also distinguished by quantitative method with `AgNO_(3)` (A) and (B) gives a white precipitate of AgCI in the presence of 3and 2 moles of `CI^(Θ)` as counter ions (iii) (A) cis `[PtCI_(2)(NH_(3))_(2)]` has some value of dipole moment while the (B) tran `[PtCI_(2)(NH_(3))_(2)]` has zero value for its dipole moment (iv) One enantiomer of `[Co(en)_(2)CI_(2)]^(o+)` is dextrorotatory (d -form) and the other enantiomer is levorotatory (l -form) (v) The give isomers can be distinguished by conductivity measurement (A) conducts as `(3 + ,3-)` electrolyte while (B) conducts as `(1 +1,1-)` electrolyte `(A)rarrunderset((3+,3-)el ectroyte)([Cr(NH_(3))_(6)]^(3+))+[Cr(NO_(2))_(6)]^(3-)` (B) `rarr underset((1+,1-) "el ectrolyte")([Cr(NH_(3))_(4)(NO_(2))_(2)]^(o+))+[Cr(NH_(3))_(2)(NO_(2))_(4)]^(o+)` Thus (A) has higher value of molar conductane than (B) (vi) `(A)` and (B) can be distinguished by conductance method The ionisation of the give complex compounds can be shown as (A) `rarr` No ions (B) `rarr underset(three ions)ubrace([Pt(NH_(3))_(6)]^(3+)+2CI^(Θ))` Therefore (A) has zero value of its electrolytic conductane whereas `(B)` gives 3 ions it has some value of electrolytic conductane (vii) (A) and `(B)` are distinguished by qualitative method `(A)` gives white precipitate of `BaSO_(4)` with `BaCI_(2)` solution due to presence of `SO_(4)^(-2)` ion as counter ion `(B)` gives white precipitate of AgCI (soluble in `NH_(4)OH)` with `AgNO_(3)` solution due to the presence of `CI^(o+)` ion as counter ion . |
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| 731. |
`[Co(NH_(3))_(6)][Cr(CN)_(6)]` and `[Cr(NH_(3))_(6)][Co(CN)_(6)]` are .A. Linkage isomersB. Ionisation isomersC. Coordination isomersD. None of these |
| Answer» Correct Answer - C | |
| 732. |
Dedue the value of x in the following compounds. (a) `[Mo(CO)_(x)]` (b) `[Co_(2)(Co)_(x)]^(2-)` (c ) `Hx (Cr (CO)_(5)` (d) `HxCo(CO)_(4)` (e) `[Fe (C_(5)H_(5))_(2)]` (f) `[Cr (C_(6)H_(6))_(2)]` . |
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Answer» In `[Mo(CO)x]`, EAN of `Mo =54` Zo of `Mo=42` Oxidation state of Mo is zero No .of electrons donated by `x CO` group `=2x` EAN of Mo in `[Mo(CO)_(x)]` `42 - 0 + 2x =54` `:. x = (54 -42)/(2) =6` `x =6` Formula is `[Mo(CO)_(6)]` (b) `[Co_(2)(CO)x],` Atomic number `(Z) of Co =27` Oxidation state of `Co =0` In `[Co_(2) (CO)x]` , i.e one electrons is shared with other `Co` atom due to `Co -Co` bond which means contribution coming because of `Co -Co bond is 1` Far `EAN` of each `Co=36` `27 -0 + 1 + (2x)/(2) =36` `implies = 8` Formula is `Co_(2)(CO)_(8)` (c ) `HxCr(CO)_(5)` Atomic number `(Z)` of `Cr =24` Electrons gained by `5CO` group `=2 x 5 =10` EAN of `Cr = 36 =24 + 10 + x` `implies x =36 -24 -10 =2` Electrons gained by Co due to 4 CO group `=2 x 4 =8` EAN of `Co =36 =27 + 8+x` `x =36 - 27 -8 =1` Formula is `HCo(CO)_(4)` `EAN = 36` (g) `EAN =36` Refer to Section 7.14.1 (b) Point 2, Fig. 7.20 and 7.21 . |
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| 733. |
Which of the following complexes ionization isomerism ?A. `[Cr(NH_(3))_(6)]Cl_(3)`B. `[Cr(en)_(2)]Cl_(2)`C. `[Cr(en)_(3)]Cl_(3)`D. `[Co(NH_(3))_(5)Br]SO_(4)` |
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Answer» Correct Answer - D (1) No anionic ligand is present in coordination sphere for the exchange with `Cl^(-)` ion present in ionisation sphere. (2) No anionic ligand is present in coordination sphere for the exchange with `Cl^(-)` ion present in ionisation sphere. (3) No anionic ligand is present in coordination sphere for the exchange with `Cl^(-)` ion present in ionisation sphere. (4) `Br^(-) and SO_(4)^(-)` can exchange their positions between coordination sphere and ionisation sphere. Hence it shows ionization isomerism. |
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| 734. |
Dedue the value of x in the following compounds. (a) `[Mo(CO)_(x)]` (b) `[Co_(2)(Co)_(x)]^(2-)` (c ) `Hx (Cr (CO)_(5)` (d) `HxCo(CO)_(4)` (c) `[Fe (C_(5)H_(5))_(x)]` (d) `[Cr (C_(6)H_(6))_(x)]` . |
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Answer» Refer to solution of above `EAN = 27 + 1 + x xx 2 = 36, x = 4`(for each Coatom) For two `Co` atoms ` x =8` (b) `Cr(Z=24)` `EAN = 1 xx x + 24 + 2 xx 5 = 36, x =2` (c ) `Co(Z=27)` `EAN = 1 xx x + 27 + 2 xx 4 =36, x =1` (d) `Mo(Z =42)` (Since Mo is a 4d transition element series so atomic weight of next noble gas is `54 Xe ` `:. EAN = 42 + 2x = 54, x =6` . |
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| 735. |
`EAN` of Fe in `[Fe(C_(2)O_(4)_(3)]^(3-)` is .A. `27`B. `24`C. `35`D. `29` |
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Answer» Correct Answer - C `EAN = Z` - oxidation number `+ 2 xx` coordination number `= 26 - 3 + 2 xx 6 =35` . |
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| 736. |
Coordination numbe of Ni in `[Ni(C_(2)O_(4))_(3)]^(4-)` is :A. 3B. 6C. 4D. 2 |
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Answer» Correct Answer - B Coordination number of nickel in `[Ni(C_(2)O_(4))_(3)]^(4-)` is 6 bcause `C_(2)O_(4)^(2-)` is a bidentate ligand. |
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| 737. |
Calculate the EAN of central atom in the following complexes `(a) [Fe(CO)_(2)(NO)_(2)] " " (b) [Fe(C_(5)H_(5))_(2)]` |
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Answer» Correct Answer - (a)36 (b) 36 (a) Fe(Z=26),EAN=26+28=36. (b)Fe(Z=26),EAN=26+10=36 |
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| 738. |
Match List-I (Complexes) with List-II (Hybridization) of central atom and select the correct answer using the codes given below the lists: `{:(,List-I,,,List-II),(A,Ni(CO)_4,,1.,sp^3),(B,[Ni(CN)_4]^(2-),,2.,dsp^2),(C,[Fe(CN)_6]^(4-),,3.,sp^3d^2),(D,[MnF_6]^(4-),,4.,d^2sp^3):}`A. (a) `{:(A,B,C,D,),(1,3,2,4,):}`B. (b) `{:(A,B,C,D,),(5,2,4,3,):}`C. (c) `{:(A,B,C,D,),(5,3,2,4,):}`D. (d) `{:(A,B,C,D,),(1,2,4,3,):}` |
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Answer» Correct Answer - D `[Ni(CO)_4]=sp^3`, `[Ni(CN)_4]^(2-)=dsp^2`, `[Fe(CN)_6]^(4-)=d^2sp^3`, `[MnF_6]^(4-)=sp_3d^2`. |
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| 739. |
Match List-I (complex ions) with List-II (number of unpaired electrons) and select the correct answers using the codes given below lists: `{:(List-I,,,,List-II),((Compl ex ion),,,,(Number of Unpaired El ectrons )),(A.,[CrF_6]^(4-),,1.,On e),(B.,[MnF_6]^(4-),,2.,Two),(C.,[Cr(CN)_6]^(4-),,3.,Three),(D.,[Mn(CN)_6]^(4-),,4.,Four), (,,,5.,Five):}`A. (a) `{:(A,B,C,D,),(4,1,2,5,):}`B. (b) `{:(A,B,C,D,),(2,5,3,1,):}`C. (c) `{:(A,B,C,D,),(4,5,2,1,):}`D. (d) `{:(A,B,C,D,),(2,1,3,5,):}` |
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Answer» Correct Answer - C `{:([CrF_6]^(4-),,n=4,,(3d^4)),([MnF_6]^(4-),,n=5,,(3d^5)),([Cr(CN)_6]^(4-),,n=2,,(3d^4)),([Mn(CN)_6]^(4-),,n=1,,(3d^5)):}` n=number of unpaired electrons and that can be calculated by CFT. |
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| 740. |
The `IUPAC` name of `[Ni(NH_(3))_(4)][NiCI_(4)]` is .A. tetrachloronickel (II)-tetraaminenickel(II)B. tetrachloronickel (II)-tetraaminenickel(II)C. tetrachloronickel (II)-tetraaminenickel(II)D. tetrachloronickel (II)-tetraaminenickel(II) |
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Answer» Correct Answer - c `[Ni(NH_(3))_(4)][NiCI_(4)]` In both cation and anion oxidation sate of nickel is `+2` The `IUPAC` name is tetraamminenickel(II) tetrachloridonickelate (II) . |
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| 741. |
Which of the following complex is most stable ?A. `[M(NH_(3))_(6)]^(2+)`B. `[M(NH_(3))_(6)]^(3+)`C. `[M(en)_(2)(NH_(3))_(2)]^(3+)`D. `[M(en)_(3)]^(3+)` |
| Answer» Correct Answer - D | |
| 742. |
Which of the following statement are incorrect ?A. If `Delta_(0) lt P `, high spin state in more stableB. `NO_(2)` is a very strong ligandC. Colour of a complex depends upon nature of metal ion onlyD. `Delta_(0) gt Delta_(t)` |
| Answer» Correct Answer - C | |
| 743. |
The correct structure of ethylenediamineteraacetic acid `(EDTA)` is .A. B. C. D. |
| Answer» Correct Answer - c | |
| 744. |
`Ag^(o+)` forms complexes:`[Ag(NH_(3))_(2)]^(o+),[Ag(CN)_(2)]^(Θ),[Ag(S_(2)O_(3))_(2)]^(3-)`. Which of the following statements is true? .A. (a) In these complexes, `Ag^(+)` is a Lewis baseB. (b) The hybridisation of `Ag^(+)` is `sp^2`C. (c) The `Ag^(+)` complexes are good reducing agentsD. (d) These complexes are all linear |
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Answer» Correct Answer - D `Ag^(+)` is sp hybridised in all these complexes hence all of them are linear. |
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| 745. |
EAN of mg is …… in `[Mg(EDTA ) ]^(2-)`A. 16B. 20C. 22D. 18 |
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Answer» Correct Answer - C EDTA is a hexadenatae ligand O.N of Mg =+2 thus , EAN `=12-2+12=22` |
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| 746. |
The formula of alum isA. (a) `K_2SO_4*Al_2(SO_4)_3*24H_2O`B. (b) `K_4[Fe(CN)_6]`C. (c) `K_2SO_4*Al_2(SO_4)_3*6H_2O`D. (d) `Na_2CO_3*10H_2O` |
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Answer» Correct Answer - A General formula for alum is `M_2SO_4.R_2(SO_4)_(3).24H_2O` M=monovalent cation `(K^(+), Na^(+)…)` R=Trivalent cation `(Al^(+3), Fe^(+3))` Hence, `K_2SO_4Al_2(SO_4)_(2).24H_2O` represent an alum. |
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| 747. |
The primary valency of iron in `K_4[Fe(CN)_6]` isA. (a) `1`B. (b) `3`C. (c) `2`D. (d) `4` |
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Answer» Correct Answer - C Primary valency of oxidation state in `K_4[Fe(CN)_6]` is `4(+1)+x+6(-1)=0` `x=+2`. |
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| 748. |
EAN of `Ni(CO)_(4)`A. `28`B. `32`C. 36D. 38 |
| Answer» Correct Answer - C | |
| 749. |
EAN of mg is …… in `[Mg(EDTA ) ]^(2-)`A. 16B. 20C. 22D. 18 |
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Answer» Correct Answer - C EDTA is a hexadenatae ligand O.N of Mg =+2 thus , EAN `=12-2+12=22` |
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| 750. |
Which of the following is an orgabometallic compound ?A. `C_(2) H_(5)-Zn-C_(2) H_(5)`B. `B (OCH_(3))_3`C. `B (OC_2H_(5))_3`D. None of the above |
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Answer» Correct Answer - A An organometallic compound is one , which contains atleast one metal - carbon bond. In ` B (OCH_(3)) and B( OC_(2) H_(5) ) _(3) ` there is no carbon atom that linked directly to a metal . |
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