Coordination Compounds PYQs Set 8 (PDF)

Set 8 of 18 · Questions 211-240 of 522

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Mere Teacher · Previous Year Questions NEET Chemistry · Coordination Compounds · Set 8 (Q211-240)
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211. $If an iron (III) complex with the formula (Fe (NH_{3})_{x} (CN)_{y})^{-} has no electron in its e_{g} orbital, then the value of x + y is$ (1) $4$ (2) $5$ (3) $6$ (4) $3$ 212. $Which of the following is a neutral complex?$ (1) $(Pt (NH_{3})_{2} Cl_{2})$ (2) $(Co (NH_{3})_{6}) Cl_{3}$ (3) $(Ni (NH_{3})_{6}) Cl_{2}$ (4) $K_{4} (Fe (CN)_{6})$ 213. $Which of the following does not show optical isomerism? (en = ethylenediamine)$ (1) $[Co(en)2Cl2]+$ (2) $[Co(NH3)3Cl3]0$ (3) $[Co(en)Cl2(NH3)2]+$ (4) $[Co(en)3]3+$ 214. $The statements that are incorrect about the nickel(II) complex of dimethylglyoxime are :(A) It is red in colour.(B) It has a high solubility in water at pH = 9 .(C) The Ni ion has two unpaired d-electrons.(D) The N - Ni - N bond angle is almost close to 90^{\circ} .(E) The complex contains four five-membered metallacycles (metal containing rings). Choose the correct answer from the options given below:$ (1) $(C) and (D) Only$ (2) $(C) and (E) Only$ (3) $(B), (C) and (E) Only$ (4) $(A), (D) and (B) Only$ 215. $Identify number of moles of donor atoms in 2 n mole of SCN^{-} ?$ (1) $3 n$ (2) $6 n$ (3) $4 n$ (4) $n$ 216. $According to crystal field theory, the M - L bond in a complex is$ (1) $purely ionic$ (2) $purely coordinate$ (3) $purely covalent$ (4) $partially covalent.$ 217. $Which one of the following has an optical isomer ? (en = ethylenediamine)$ (1) $[Zn(en)(NH3)2]2+$ (2) $[Co(en)3]3+$ (3) $[Co(H2O)4(en)]3+$ (4) $[Zn(en)2]2+$ 218. $In a complexometric titration of metal ion with ligand M (Metal ion) + L (Ligand) \to C (Complex) end point is estimated spectrophotometrically (through light absorption). If 'M' and 'C' do not absorb light and only 'L' absorbs, then the titration plot between absorbed light (a) versus volume of ligand 'L' (V) would look like :$ (1) (2) (3) (4) 219. $Which among the following cations forms a least stable complex if the ligand is same?$ (1) $Fe^{2 +}$ (2) $Ni^{2 +}$ (3) $Cd^{2 +}$ (4) $Co^{2 +}$ 220. $Which of the following cannot be explained by crystal field theory?$ (1) $The order of spectrochemical series$ (2) $Magnetic properties of transition metal complexes$ (3) $Colour of metal complexes$ (4) $Stability of metal complexes$ 221. $Complex A has a composition of H_{12} O_{6} Cl_{3} Cr . If the complex on treatment with conc. H_{2} SO_{4} loses 13.5 % of its original mass, the correct molecular formula of A is [Given : atomic mass of Cr = 52 amu and Cl = 35 amu$ (1) $[Cr (H_{2} O)_{6}] Cl_{3}$ (2) $[Cr (H_{2} O)_{4} Cl_{2}] Cl \cdot 2 H_{2} O$ (3) $[Cr (H_{2} O)_{3} Cl_{3}] \cdot 3 H_{2} O$ (4) $[Cr (H_{2} O)_{5} Cl] Cl_{2} \cdot H_{2} O$ 222. $The correct order of energy of absorption for the following metal complexes is A: [Ni(en)_{3}]^{2 +}, B: [Ni(N H_{3})_{6}]^{2 +}, C: [Ni(H_{2} O)_{6}]^{2 +}$ (1) $C < B < A$ (2) $B < C < A$ (3) $C < A < B$ (4) $A < C < B$ 223. $The pair in which both species have the same magnetic moment (spin only value) is :$ (1) $[Cr(H2O)6]2+ , [CoCl4]2-$ (2) $[Cr(H2O)6]2+ , [Fe(H2O)6]2+$ (3) $[Mn(H2O)6]2+ , [Cr(H2O)6]2+$ (4) $[CoCl4]2- , [Fe(H2O)6]2+$ 224. $The correct increasing order of stability of the complexes based on Δ_{o} value is: I. (Mn (CN)_{6})^{3 -} II. (Co (CN)_{6})^{4 -} III. (Fe (CN)_{6})^{4 -} IV. (Fe (CN)_{6})^{3 -}$ (1) $IV < III < II < I$ (2) $I < II < IV < III$ (3) $III < II < IV < I$ (4) $II < III < I < IV$ 225. $Which of the following complex species is not expected to exhibit optical isomerism ?$ (1) $[Co (e n)_{3}]3+$ (2) $[Co (e n)_{2} C l_{2}]+$ (3) $[Co (N H_{3})_{3} C l_{3}]$ (4) $[Co(en) (NH3)2 Cl2]+$ 226. $Which one of the following is expected to exhibit optical isomerism? (en = ethylenediamine)$ (1) $cis-[Pt(NH3)2Cl2]$ (2) $trans-[Co(en)2Cl2]+$ (3) $trans-[Pt(NH3)2Cl2]$ (4) $cis-[Co(en)2Cl2]+$ 227. $The F^{-} ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into much harder fluoroapatite having the formula.$ (1) $(3 (Ca_{3} (PO_{4})_{2}) \cdot Ca (OH)_{2})$ (2) $(3 (Ca_{3} (PO_{4})_{3}) \cdot CaF_{2})$ (3) $(3 (Ca_{2} (PO_{4})_{2}) \cdot Ca (OH)_{2})$ (4) $(3 (Ca_{3} (PO_{4})_{2}) \cdot CaF_{2})$ 228. $The/sum of oxidation state and co-ordination number of central metal atom is maximum with respect to which of the following complex?$ (1) $K_{3} (Cr (C_{2} O_{4})_{3})$ (2) $(Cr (CO)_{6})$ (3) $K_{2} (PtCl_{6})$ (4) $K_{4} (Fe (CN)_{6})$ 229. $The IUPAC name of (PtCl (NH_{2} CH_{3}) (NH_{3})_{2}) Cl is :$ (1) $diamminechloro(methylamine)platinum(II)chloride$ (2) $bis(ammine)chloro(methylamine)platinate(II)chloride$ (3) $diaminechloro(mehylamine)platinum(II)chloride$ (4) $(dimethylamine)chlorodiamminoplatinum(II)chloride$ 230. $The one that is not expected to show isomerism is$ (1) $[Pt (NH_{3})_{2} Cl_{2}]$ (2) $[Ni (NH_{3})_{4} (H_{2} O)_{2}]^{2 +}$ (3) $[Ni (en)_{3}]^{2 +}$ (4) $[Ni (NH_{3})_{2} Cl_{2}]$ 231. $The secondary valency of platinum in tetrammine dichloroplatinum (IV) chloride is$ (1) $+4$ (2) $+2$ (3) $3$ (4) $6$ 232. $An octahedral complex with molecular composition M. 5 N H_{3} .Cl. S O_{4} has two isomers, A and B. The solution of A gives a white precipitate with A g N O_{3} solution and the solution of B gives white precipitate with B a C l_{2} solution. The type of isomerism exhibited by the complex is:$ (1) $Linkage isomerism$ (2) $Ionisation isomerism$ (3) $Coordinate isomerism$ (4) $Geometrical isomerism$ 233. $(Co (NH_{3})_{6})^{3 +} and (CoF_{6})^{3 -} are respectively known as:$ (1) $Spin free Complex, Spin paired Complex$ (2) $Spin paired Complex, Spin free Complex$ (3) $Outer orbital Complex, Inner orbital Complex$ (4) $Inner orbital Complex, Spin paired Complex$ 234. $Which one of the following complexes shows optical isomerism ?$ (1) $cis[Co(en)_{2} C l_{2}]Cl$ (2) $trans[Co(en)_{2} C l_{2}]Cl$ (3) $[Co(N H_{3})_{4} C l_{2}]Cl$ (4) $[Co(N H_{3})_{3} C l_{3}]$ 235. $According to Werner's theory, the number of groups bonded to the central metal atom/ion in a coordination complex represent.$ (1) $Oxidation state$ (2) $Primary Valency$ (3) $Secondary Valency$ (4) $Polyhedron$ 236. $The hypothetical complex Chlorodiaquatriamminecobalt ( III) chloride can be represented as$ (1) $[ CoCl(NH3)3 (H2O)2]Cl2$ (2) $[ Co(NH3)3 (H2O)]Cl3]$ (3) $[Co(NH3)3 (H2O)2]Cl]$ (4) $[Co(NH3)3 (H2O)3]Cl3$ 237. $C u S O_{4} . 5 H_{2} O is blue in colour while C u S O_{4} is colourless, because$ (1) $H_{2} O is a strong field ligand than SO_{4}^{2-}$ (2) $SO_{4}^{2} is a strong field ligand$ (3) $C u S O_{4} cannot form the complex$ (4) $No d-d transition is possible in C u S O_{4}$ 238. $In which of the following coordination entities the magnitude of Δ0 (CFSE in octahedral field) will be maximum (At No Co = 27)$ (1) $[Co(H2O)6]3+$ (2) $[Co(NH3)6]3+$ (3) $[Co(CN)6]3-$ (4) $[Co(C2O4)3]3-$ 239. $Identify the homoleptic complex(es) that is/are low spin. (A) (Fe (CN)_{5} NO)^{2 -} (B) (CoF_{6})^{3 -} (C) (Fe (CN)_{6})^{4 -} (D) (Co (NH_{3})_{6})^{3 +} (E) (Cr (H_{2} O)_{6})^{2 +} Choose the correct answer from the options given below :$ (1) $(C) only$ (2) $(C) and (D) only$ (3) $(A) and (C) only$ (4) $(B) and (E) only$ 240. $Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian bluecoloured colloidal species. It is :$ (1) $F e_{4} [Fe(CN)_{6}]_{3}$ (2) $K_{5} Fe[Fe(CN)_{6}]_{2}$ (3) $HFe [Fe (C N)_{6}]$ (4) $KFe [Fe (C N)_{6}]$