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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.
| 101. |
The sum of coordination number and oxidation number of the metal M in the complex `[M(en)_(2) (C_(2)O_(4))]CI` (where en is ethylenediamine) is:A. 9B. 6C. 7D. 8 |
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Answer» Correct Answer - A C.No `=6` O.No. `= +3` |
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| 102. |
Number of possible isomer for the complex `[Co(en)_(2)CI_(2)]CI` will be: (em = ethylenediamine)A. 2B. 1C. 3D. 4 |
| Answer» Correct Answer - C | |
| 103. |
The total number possible isomers for the complex compound `[Cu^(II)(NH_(3))_(4) [Pt^(II)CI_(4)]` areA. 3B. 4C. 5D. 6 |
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Answer» Correct Answer - D 1.`[Cu(NH_(3))_(4)].[PtCl_(4)]` 2.`[Cu(NH_(3))_(3)Cl].[PtCl_(3)(NH_(3))]` 3. `[Cu(NH_(3))_(2)Cl_(2)].[PtCl_(2)(NH_(3))_(2)]`cis 4. `[Cu(NH_(3))_(2)Cl_(2)].[PtCl_(2)(NH_(3))_(2)]` Trans 5. `[Cu(NH_(3))Cl_(3)].[Pt(Cl)(NH_(3))_(3)]` 6. `[Pt(NH_(3))_(4)Cl].[CuCl_(4)]` |
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| 104. |
Which compound is zero valent metal complexA. `[Cu(NH_(3))_(4)]SO_(4)`B. `[Pt(NH_(3))_(2) Cl_(2)]`C. `[Ni(CO)_(4)]`D. `K_(3)[Fe(CN)_(6)]` |
| Answer» Correct Answer - C | |
| 105. |
Statement I `[Fe(H_(2)O)_(5)NO]SO_(4)` is paramagnetic Statement II The Fe in `[Fe(H_(2)O)_(5)NO]SO_(4)` has three unpaired electrons .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 |
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Answer» Correct Answer - C The compound `overset(+1)("[Fe")(H_(2)O_(5))overset(+1)(NO)"]"SO_(4)` is paramagnetic because Fe atom is in `+1` stage i.e., `d^(7)` configuration having 3 unpaired electron. `Fe^(+)= 3d^(6)4s^(1)=3d^(7)4s^(0)` ( Due to strong field ligand) |
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| 106. |
Dimethyl glyoxime gives a red precipitate with `Ni^(2+)`, which is used for its detection. To get this precipitate readily the best `pH` range isA. ` lt 1`B. `2-3`C. `3-4`D. `9-11` |
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Answer» Correct Answer - D This reaction carried out in alkaline pH ie., 9-11 |
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| 107. |
In `K_(4)Fe(CN)_(6)`A. `(CN)` are linked with primary valencyB. `(CN)` are linked with secondary valencyC. K are linked with secondary valencyD. K are linked with non-ionic valency |
| Answer» Correct Answer - B | |
| 108. |
The geometries of the ammonia complexes of `Ni^(2+),Pt^(2+)` and `Zn^(2+)`, respectively, areA. Octahedral , square planar and tetrahedralB. Square planar, octahdral and tetrahedralC. Tetrahedral , square planar and octahedralD. Octahedral, tetrahedral and square planar |
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Answer» Correct Answer - A `underset("octahedral")([Ni(NH_(3))_(6)]^(2+)), underset("square planar")([Pt(NH_(3))_(4)]^(2+)),underset("tetrahedral")([Zn(NH_(3))_(4)]^(2+))` |
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| 109. |
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: Potassium ferrocyanide is diamagnetic whereas potassium ferricyanide is paramagnetic. Reason: Crystal field splitting in ferrocyanide ion is greater than that of ferricyanide ion.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. if assertion is true but reason is false.D. If the assertion is false but reason is true |
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Answer» Correct Answer - C `K_(4)[Fe(CN)_(6)]` and `K_(3)[Fe(CN)_(6)]` both are low spin complex due to strong ligand field. That is why it is false that crystal field splitting in ferrocyanide ion is greater than ferricyanide ion |
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| 110. |
In coordination compound `[Co(en)_(2)Cl_(2)]Cl` which is falseA. Show geometrical isomerismB. Show optical isomerismC. Show ionic isomerismD. A octahedral complex |
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Answer» Correct Answer - C When coordinate compounds give different ions in solution then it produces ionic isomerism while this situation is not present in `[Co(en)_(2)Cl_(2)]Cl`. |
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| 111. |
The correct structure of ethylenediamineteraacetic acid `(EDTA)` is .A. B. C. D. |
| Answer» Correct Answer - A | |
| 112. |
Which of the following is wrong statement?A. `Ni(CO)_(4)` has oxidation number of `+4` for NiB. `Ni(CO)_(4)` has zero oxidation number of NiC. Ni is metalD. CO is gas |
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Answer» Correct Answer - A `Ni(CO)_(4)` has O.N. zero for Ni. |
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| 113. |
In Spectrochemical series , chorine is above than water . I .e ` Cl gt H_(2) O` this is due toA. Good `pi ` - acceptor properties of ClB. Strong` sigma-` donor and good `pi-` acceptor properties of ClC. Good `pi-` donor properties of ClD. Larger size of Cl than `H_(2)O` |
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Answer» Correct Answer - B When ligands are arranged in ascending order of crystal field strength energy, `Delta` they produced a spectrochemical series. In comparison to `H_(2)O, `Cl is strong `sigma` donor and good `pi` acceptor, therefore, it is a stronger ligand than `H_(2)O`. Hence, in the spectrochemical series, Cl is above than water. |
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| 114. |
In `[Ag(CN)_2]^(-)`, the number of `pi` bonds isA. 2B. 3C. 4D. 6 |
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Answer» Correct Answer - C Both cyanide ions have two pi bonds. |
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| 115. |
When EDTA solution is added to `Mg^(2+)` ion solution then the incorect statement regarding the reaction will beA. Four coordinate sites of `Mg^(2+)` are occupied by EDTA and remaining two sites are occupied by water moleculesB. All six coorinate sites of `Mg^(2+)` are occupiedC. pH of the soluiton is decreasedD. Colourless `[Mg-EDTA]^(2-)` chelate is formed |
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Answer» Correct Answer - A `[H_(2)EDTA]^(2-)+Mg^(2+) rarr [Mg-EDTA ]^(2)+2H^(+)` (i) In this complex, four donor sites are occupied by oxygen and two donor sites are occupied by hydrogen. (ii) This complex is six coordinated. (iii) Complex `[Mg-EDTA]^(2-)` is colourless. (iv) Increase in `[H^(+)]` decreases pH of the solution |
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| 116. |
Zn and Ag can be separated from each other byA. DistillationB. Heating with conc. `NaOH`C. Treatment with dil. `HNO_(3)`D. Treatment with conc. `H_(2)SO_(4)` |
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Answer» Correct Answer - ABC (a) Zn and Ag can be separated by distillation because they differ in their melting and boiling points and can be separated (b) Is correct because Zn reacts with conc. NaOH whereas Ag does not (c ) Is not correct because both reacts with dil. `HNO_(3)` (d) Is not correct because both react with conc. `H_(2)SO_(4)`. |
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| 117. |
Number of ions present in `K_4[Fe(CN)_6]`A. 2B. 10C. 3D. 5 |
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Answer» Correct Answer - D `K_(4)[Fe(CN)_(6)]` is a complex salt . On ionisation it will dissociate in `4K^(+)` and `[Fe(CN)_(6)]^(4-)` oin. Hence, in `K_(4)[Fe(CN)_(6)]` five ions are present. |
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| 118. |
Which of the following is TRUE for `[Fe(CN)_(6)]^(3-)` and `[FeF_(6)]^(3-)` ?A. Both are paramagneticB. Only `[Fe(CN)_(6)]^(3-)` is paramagneticC. Only `[FeF_(6)]^(3-)` is paramagneticD. Both are diamagnetic |
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Answer» Correct Answer - A Due to the presence of one unpaired electron, both are slightly paramagnetic. |
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| 119. |
Which among the following will be named as dibromidobis-(ethylenediamine) chromium (III) bromide?A. `[Cr( en)_(3) ]Br_(3)`B. `[Cr(en)_(2) Br_(2)]Br`C. `[Cr(en)Br_(4)]^(-)`D. `[Cr(en)Br_(2) ]Br` |
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Answer» Correct Answer - B `[Cr(en)_(2)Br_(2)]Br` dibromidobis(ethylenediamine ) chromium (III) Bromide |
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| 120. |
Magnetic moment of `[Cu(NH_(3))_(4)]^(2+)` ion isA. 1.414B. 1.73C. 2.23D. 2.38 |
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Answer» Correct Answer - B Magnetic moment of `[Cu(NH_(3))_(4)]^(2+)` ion in 1.73 due to the presence of one unpaired electron. |
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| 121. |
The oxidation state of nickel in `K_(4)Ni(CN)_(4)` is:A. `-1`B. `0`C. `+1`D. `+2` |
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Answer» Correct Answer - B `+1 xx 4+x - 1 xx 4=0` `4 +x-4=0implies x= 0 ` for Ni |
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| 122. |
Effective atomic number of the central metal ion, Pt, in the complex `[Pt(NH_(3))_(6)]^(4+)` is , ( the atomic no. of Pt is 78)A. 74B. 90C. 86D. 84 |
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Answer» Correct Answer - C EAN `= ` Atomic number of metal `-` no. of `e^(-)` lost in ion formation `+` no. of `e^(-)` gained from donor atoms of the ligands. EAN of `Pt` in `[Pt(NH_(3))_(6)]^(4+) = (78-4)+(6 xx 2) = 86` |
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| 123. |
IUPAC name of `K_(3)[Fe(CN)_(6)]` isA. Potassium ferrocyanide (II)B. Potassium hexaferrocyanate (III)C. Potassium ferrohexacyanate (II)D. Potassium hexacyanoferrate (III) |
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Answer» Correct Answer - D Follow IUPAC rules for nomenclature. |
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| 124. |
The co-ordination number and oxidation number of X in the following compound `[X(SO_(4))(NH_(3))_(5)]Cl` will beA. 6 and 4B. 10 and 3C. 2 and 6D. 6 and 3 |
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Answer» Correct Answer - D Co-ordination no. is 6. oxidation state in `[underset(x) (X) underset(-2)((SO_(4)))underset(0)((NH_(3))_(5))]underset(-1)(Cl)` is `x-2+0-1=0,x=+3` |
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| 125. |
The IUPAC name of `K_(3)[Ir(C_(2)O_(4))_(3)]` isA. Potassium trioxalato iridium (III)B. Potassium trioxalato iridate (III)C. Potassium tris (oxalato) iridium (III)D. Potassium tris (oxalato) iridate (III) |
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Answer» Correct Answer - B Follow IUPAC rule |
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| 126. |
The IUPAC name of the compound `[CuCl_(2)(CH_(3)NH_(2))_(2)]` isA. Dichloro bis (dimethyl amine) copper (II)B. Dichloro bis ( methyl amine ) copper (II)C. Dimethyl amine copper (II) chlorideD. Bis (dimethyl amine) copper (II) chloride |
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Answer» Correct Answer - B The correct IUPAC name of `[CuCl_(2)(CH_(3)NH_(2))_(2)]` is dichloro bis (methyl amine) copper (II) |
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| 127. |
The oxidation number of cobalt in `K[Co(CO)_(4)]` is:A. `+1`B. `-1`C. `+3`D. `-3` |
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Answer» Correct Answer - B `1 xx (+1) +x +4 xx (0) = 0` `1+x=0 implies x= -1` Oxidation number of Co `= -1` |
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| 128. |
The IUPAC name for `[Be_(4)O(CH_(3)COO)_(6)]` isA. Basic beryllium acetate (II)B. Hexa `- mu-` hexakis (acetato ) beryllium (II)C. Hexa `- mu -` acetato (O,O) `- mu _(4) - oxo-`tetra-beryllium (II)D. Hexaacetato - `mu ` oxo `-` beryllate (II) |
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Answer» Correct Answer - C Follow nomenclature rules. |
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| 129. |
The correct statement with respect to the complexes `Ni(CO)_(4) and |Ni(CN)_(4)|^(2-)` isA. Nickel is in the same oxidation state in bothB. Both have tetrahedral geometryC. Both have square planar geometryD. Have tetrahedral and square planar geometry respectively |
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Answer» Correct Answer - D Hybridization of nickel in `Ni(CO)_(4)` is `sp^(3)` , therefore geometry of `Ni(CO)_(4)` is tetrahedral whereas hybridization of nickel in `[Ni(CN)_(6)]^(2-)` is `dsp^(2)`, therefore geometry of `[Ni(CN)_(4)]^(2-)` is square planar. |
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| 130. |
Which of the following pairs is not correctly matchedA. Effective atomic nmber of Pt in `[PtCl_(6)]^(2-)= 84`B. Absorption peak for `[Cr^(III)(NH_(3))_(6) ]^(+3) = 21680cm^(-1)`C. Crystal field stabilization energy of `d^(2)` in weak ligand field `= ( - ) 0.8 Delta _(0)`D. Example of weak ligand field for `d^(5)` configuration `=[ Mn^(II) F_(6)]^(-4)` |
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Answer» Correct Answer - A EAN `= (78-4) +6 xx 2 = 86` |
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| 131. |
Which complex of `Co^(2+)` will have the weakest crystal field splittingA. `[Co(CN)_(6)]^(4-)`B. `[CoCl_(6)]^(4-)`C. `[Co(en)_(3)]^(2+)`D. `[Co(H_(2)O)_(6)]^(2+)` |
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Answer» Correct Answer - B Spectrochemical series `I^(-) lt Br^(-) lt SCN^(-) lt Cl^(-) lt S^(2) lt F^(-)lt OH^(-) lt C_(2)O_(4)^(2-) lt H_(2)O lt NCS^(-) lt EDTA^(4-) lt NH_(3) lt en lt CN^(-) lt CO` ( Strongest) |
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| 132. |
Among the following metal carbonyls, the `C-O` bond order is lowest inA. `[Mn(CO)_(6)]^(+)`B. `[Fe(CO)_(5)]`C. `[Cr(CO)_(6)]`D. `[V(CO)_(6)]^(-)` |
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Answer» Correct Answer - D An anionic carbonyl complex can delocalise more electron density to antibonding pi orbital of CO and hence lowers the bond order. |
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| 133. |
Which of the following is not true for metal carbonylsA. The oxidation state of the metal in the carbonyls is zeroB. The secondary carbonyls are obtained from photo-decompositionC. Metal carbonyls are single bonded speciesD. `dpi - p pi` overalp is observed in metal carbonyls |
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Answer» Correct Answer - D Metal carbonyls does not show overlapping. |
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| 134. |
Among the following , the species having square planar geometry for central atoms are (i) `XeF_(4)` (ii) `SF_(4)` (ii) `|NiCl_(4)|^(2-)` (iv)`|PtCl_(4)|^(2)`A. i and ivB. (i) and (ii)C. (ii) and (iii)D. (iii) and (iv) |
| Answer» Correct Answer - A | |
| 135. |
The complex chloro diaquatriammine cobalt (III) chloride is represented asA. `[Co(NH_(3))_(3)(H_(2)O)_(3)]Cl_(2)`B. `[Co(NH_(3))_(3)(H_(2)O)_(2)]Cl_(2)`C. `[CoCl(NH_(3))_(3)(H_(2)O)_(2)]Cl_(3)`D. `[CoCl(NH_(2))_(2)]Cl_(2)` |
| Answer» Correct Answer - D | |
| 136. |
`[NiCl_(2){P(C_(2)H_(5))_(2)(C_(6)H_(5))}_(2)]` exhibits temperature dependent magnetic behaviour. The coordination geometries of `Ni^(2+)` in the paramagnetic and diamagnetic states are:A. Tetrahedral and tetrahedralB. Square planar and square planarC. Tetrahedral and square planarD. Square planar and tetrahedral |
| Answer» Correct Answer - C | |
| 137. |
Which of the following is a common donor atom in ligandsA. ArsenicB. NitrogenC. OxygenD. Both (b) and (c ) |
| Answer» Correct Answer - D | |
| 138. |
Coordination isomerism is caused by the interchange of ligands between theA. cis and trans structureB. Complex cation and complex anionC. Inner sphere and outer sphereD. Low oxidation and higher oxidation states |
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Answer» Correct Answer - B Co-ordination isomerism is caused by the interchange of ligands between cation and anion complexes. |
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| 139. |
According to Lewis the ligands areA. Acidic in natureB. Basic in natureC. Neither acidic nor basicD. Some are acidic and others are basic |
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Answer» Correct Answer - B According to Lewis the ligands are basic in nature. |
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| 140. |
The number of ions given by the complex compound `[Co(NH_(3))_(4)Cl_(2)]Cl` isA. 2B. 3C. 4D. 5 |
| Answer» Correct Answer - A | |
| 141. |
Which of the following statement is correctA. `[Cu(NH_(3))_(6)]^(2+)` is a colourless ionB. `[Zn(H_(2)O)_(6)]^(2+)` ion is blue colouredC. `[Ni(CN)_(4)]^(2-)` ion has a tetrahedral shapeD. Nickel dimethyl glyoxides is red in colour |
| Answer» Correct Answer - D | |
| 142. |
In the extraction of which of the following, complex ion formsA. CuB. AgC. FeD. Na |
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Answer» Correct Answer - B `Ag_(2)S +4NaCN hArr underset("Sodiumdicy anoargentate")(2Na[Ag(CN)_(2)]+Na_(2)S)` `2Na[Ag(CN)_(2)]+Znrarr underset("Sodiumtetracyanozincate(ppt)")(Na_(2)[Zn(CN)_(4)]+2Agdarr)` |
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| 143. |
The most stable complex among the following isA. `[Pb(CN)_(4)]^(4-)`B. `[Fe(CO)_(5)]`C. `[Ni(CN)_(4)]^(4-)`D. `[Ni(CN)_(4)]^(3-)` |
| Answer» Correct Answer - B | |
| 144. |
The most stable complex among the following isA. `K_(3)[Al(C_(2)O_(4))_(3)]`B. `[Pt(en)_(2)]Cl_(2)`C. `[Ag(NH_(3))_(2)]Cl`D. `K_(2)[Ni(EDTA)]` |
| Answer» Correct Answer - D | |
| 145. |
Which of the following system is most stable for a chelate ?A. Two fused cyclic systemB. Three fused cyclic systemC. Four fused cyclic systemD. Five fused cyclic system |
| Answer» Correct Answer - D | |
| 146. |
Which of the following configuration can undergo distortionA. `t_(2g)^(6)e_(g)^(1)`B. `t_(2g)^(6)e_(g)^(2)`C. `t_(2g)^(6)e_(g)^(4)`D. `t_(2g)^(6)e_(g)^(0)` |
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Answer» Correct Answer - A Repulsion by six ligands in an octahedral complex splits the d-orbitals on the central atom into `t_(2g)` and `e_(g)` levels. It follows that there is a corresponding repulsion between the d-electrons and the ligands . If the d-electrons are symmetrically arranged, they will repel all six ligands equally. Thus the structure will be regular octahedron. If the d-electrons are asymmetrically arranged, they will repel some ligands in the complex more than others. Thus the structure is distorted. Out of the given options, symmetrical arrangements are `: (b) t_(2g) ^(6) e_(g)^(2)` (c )`t_(2g)^(6)e_(g)^(4)` (d)`t_(2g)^(6) e_(g)^(0)` unsymmetrical arrangement is `: (a) t_(2g)^(6) e_(g)^(1)` |
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| 147. |
The most stable ion is :A. `[Fe(OH)_(3)]^(3-)`B. `[Fe(Cl)_(6)]^(3-)`C. `[Fe(CN)_(6)]^(3-)`D. `[Fe(H_(2)O)_(6)]^(3+)` |
| Answer» Correct Answer - D | |
| 148. |
In a complex, the highest possible coordination number isA. 6B. 12C. 4D. 8 |
| Answer» Correct Answer - D | |
| 149. |
The complex compunds which result from the coordination of carbon monoxide are known asA. ElectronicB. CarbonylsC. CarbonatesD. Carbon permono |
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Answer» Correct Answer - B e.g., `Fe(CO)_(5) , Ni(CO)_(4)` etc. |
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| 150. |
The coordination number of Cu in complex `[Cu(H_(2)O)_(4)]^(++)` isA. 4B. 3C. 2D. 1 |
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Answer» Correct Answer - A The co-ordination no. `=` no. of ligands attached. |
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