Coordination Compounds PYQs Set 8 (PDF)

Set 8 of 20 · Questions 211-240 of 596

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Coordination Compounds · Set 8 (Q211-240)
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211. $When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change observed will be:$ (1) $Violet \to Blue \to Pale Blue \to Green$ (2) $Pale Blue \to Blue \to Green \to Violet$ (3) $Green \to Pale Blue \to Blue \to Violet$ (4) $Pale Blue \to Blue \to Violet \to Green$ 212. $Given below are two statements : Statement I: [N i (C N) 4]^{2 -} is square planar and diamagnetic complex, with d s p^{2} hybridization for Ni but [Ni (C O)_{4}] is tetrahedral. paramagnetic and with s p^{3} -hybridication for Ni. Statement II: [N i C l_{4}]^{2 -} and [Ni (C O)_{4}] both have same d-electron configuration have same geometry and are paramagnetic. choose the correct answer form the options given below:$ (1) $Both Statement I and Statement II are true.$ (2) $Both Statement I and Statement II are false.$ (3) $Statement I is correct but statement II is false.$ (4) $Statement I is incorrect but statement II is true.$ 213. $The d ‐electron configurations of C r^{2 +}, M n^{2 +}, F e^{2 +} and C o^{2 +} are d^{4}, d^{5}, d^{6} and d^{7} respectively. Which one of the following will exhibit minimum paramagnetic behaviour?$ (1) $[M n (H_{2} O)_{6}]^{2 +}$ (2) $[F e (H_{2} O)_{6}]^{2 +}$ (3) $[C o (H_{2} O)_{6}]^{2 +}$ (4) $[C r (H_{2} O)_{6}]^{2 +} (At. nos. C r = 24, M n = 25, F e = 26, C o = 27)$ 214. $Among the following complexes (K-P), K_{3} [Fe (C N)_{6}] (K), [Co (N H_{3})_{6}] C l_{3} (L), N a_{3} [Co (o x a l a t e)_{3}] (M), [Ni (H_{2} O)_{6}] C l_{2} (N), K_{2} [Pt (C N)_{4}] (O) and [Zn (H_{2} O)_{6}] (N O_{3})_{2} (P) the diamagnetic complexes are :$ (1) $K, L, M, N$ (2) $K, M, O, P$ (3) $L, M, O, P$ (4) $L, M, N, O$ 215. $Correct increasing order for the wavelength of absorption in the visible region for the complexes of C o^{3 +} is :$ (1) $[Co(en)_{3}]^{3 +}, [Co(N H_{3})_{6}]^{3 +}, [Co(H_{2} O)_{6}]^{3 +}$ (2) $[Co(H_{2} O)_{6}]^{3 +}, [Co(en)_{3}]^{3 +}, [Co(N H_{3})_{6}]^{3 +}$ (3) $[Co(H_{2} O)_{6}]^{3 +}, [Co(N H_{3})_{6}]^{3 +}, [Co(en)_{3}]^{3 +}$ (4) $[Co(N H_{3})_{6}]^{3 +}, [Co(en)_{3}]^{3 +}, [Co(H_{2} O)_{6}]^{3 +}$ 216. $Match List I with List II List-I (Compound) A. Iodoform B. Carbon tetrachloride C. CFC D. DDT List - II (Uses) I. Fire extinguisher II. Insecticide III. Antiseptic IV. Refrigerants Choose the correct answer from the options given below:$ (1) $A-I, B-II, C-III, D-IV$ (2) $A-III, B-I, C-IV, D-II$ (3) $A-II, B-IV, C-I, D-III$ (4) $A-III, B-II, C-IV, D-I$ 217. $Transition metal complex with highest value of crystal field splitting (_{0}^{∆}) will be$ (1) $[C r (H_{2} O)_{6}]^{3 +}$ (2) $[M o (H_{2} O)_{6}]^{3 +}$ (3) $[F e (H_{2} O)_{6}]^{3 +}$ (4) $[O s (H_{2} O)_{6}]^{3 +}$ 218. $Given below are two statements : Statement I : Crystal Field Stabilization Energy (CFSE) of (Cr (H_{2} O)_{6})^{2 +} is greater than that of (Mn (H_{2} O)_{6})^{2 +} . Statement II: Potassium ferricyanide has a greater spin-only magnetic moment than sodium ferrocyanide. In the light of the above statements, choose the correct answer from the options given below :$ (1) $Both Statement I and Statement II are true$ (2) $Both Statement I and Statement II are false$ (3) $Statement I is true but Statement II is false$ (4) $Statement I is false but Statement II is true$ 219. $Which of the following complexes is used to be as an anticancer agent?.$ (1) $m er - [C o (N H_{3})_{3} C l_{3}]$ (2) $c i s - [P tC l_{2} (N H_{3})_{2}]$ (3) $c i s - K_{2} [P tC l_{2} B r_{2}]$ (4) $N a_{2} C o C l_{4}$ 220. $The metal ion whose electronic configuration is not affected by the nature of the ligand and which gives a violet colour in non-luminous flame under hot condition in borax bead test is$ (1) $Mn^{2 +}$ (2) $Cr^{3 +}$ (3) $Ni^{2 +}$ (4) $Ti^{3 +}$ 221. $The complex that has highest crystal field splitting energy (Δ) is:$ (1) $(Co (NH_{3})_{5} (H_{2} O)) Cl_{3}$ (2) $K_{2} (CoCl_{4})$ (3) $(Co (NH_{3})_{5} Cl) Cl_{2}$ (4) $K_{3} (Co (CN)_{6})$ 222. $Give the IUPAC name of (Pt (NH_{3})_{4}) (PlCl_{4}) is$ (1) $tetraammineplatinate(II)tetrachloridoplatinum(II)$ (2) $tetraammineplatinate (0) tetrachlorido platinum(IV)$ (3) $tetraammineplatinum(II)tetrachloridoplatinate(II)$ (4) $tetraammineplatinum (0) tetrachloridoplatinum(IV).$ 223. $The correct statement on the isomerism associated with the following complex ions, (A) [Ni(H_{2} O)_{5} N H_{3}]^{2 +}, (B) [Ni(H_{2} O)_{4} (N H_{3})_{2}]^{2 +} and (C) [Ni(H_{2} O)_{3} (N H_{3})_{3}]^{2 +} is :$ (1) $(A) and (B) show only geometrical isomerism.$ (2) $(B) and (C) show geometrical and optical isomerism$ (3) $(B) and (C) show only geometrical isomerism$ (4) $(A) and (B) show geometrical and optical isomerism$ 224. $What is coordination number of central metal ion in (Fe (C_{2} O_{4})_{3})^{3 -} ?$ (1) $3$ (2) $5$ (3) $4$ (4) $6$ 225. $Identify the use of EDTA from following.$ (1) $treatment of lead poisoning$ (2) $electroplating of noble metals$ (3) $treatment for cancer$ (4) $transmission of nerve signals.$ 226. $Which of the following is correct related to the colours of TiCl_{3} (X) (Ti (H_{2} O)_{6}) Cl_{3} (Y) .$ (1) $X = Colourless Y = Colouored$ (2) $X = Colouored Y = Colouored$ (3) $X = Colourless Y = Colourless$ (4) $X = Colouored Y = Colourless$ 227. $The oxidation number of central metal in (Pt (NH_{3})_{2} Cl (NO_{2})) and (CoCl_{2} (en)_{2})^{\oplus} respectively, are$ (1) $+ 2 : + 1$ (2) $+ 2 : + 2$ (3) $+ 2 : + 3$ (4) $+ 3 : + 2$ 228. $Coordination number of Ni in N i (C_{2} O_{4})_{3}]^{4 -} is$ (1) $3$ (2) $6$ (3) $4$ (4) $2$ 229. $The mismatched combinations are (A) Chlorophyll-Co (B) Water hardness-EDTA (C) Photography-[Ag(CN)_{2}]^{-} (D) Wilkinson catalyst- [(P h_{3} P)_{3} RhCl] (E) Chelating ligand-D-Penicillamine Choose the correct answer from the options given below.$ (1) $A, C and E only$ (2) $A and C only$ (3) $A and E only$ (4) $D and E only$ 230. $The correct increasing order of spin-only magnetic moment values of the complex ions (MnBr_{4})^{2 -} (A), (Cu (H_{2} O)_{6})^{2 +} (B), (Ni (CN)_{4})^{2 -} (C) and (Ni (H_{2} O)_{6})^{2 +} (D) is:$ (1) $(C) = (D) < (B) < (A)$ (2) $(C) < (B) < (D) < (A)$ (3) $(A) = (B) < (D) < (C)$ (4) $(A) = (B) < (C) < (D)$ 231. $The theory that can completely/properly explain the nature of bonding in [Ni (C O)_{4}] is:$ (1) $Crystal field theory$ (2) $Werner's theory$ (3) $Molecular orbital theory$ (4) $Valence bond theory$ 232. $Which of the following types of isomerism is exhibited by (Co (NH_{3})_{5} (NO_{2})) (NO_{3})_{2} i. Optical ii. Linkage iii. Ionization iv. Coordination$ (1) $ii, iii only$ (2) $i, ii, iii only$ (3) $i, iii only$ (4) $ii, iv only$ 233. $If an iron (III) complex with the formula (Fe (NH_{3})_{x} (CN)_{y})^{-} has no electron in its e_{g} orbital, then the value of x + y is$ (1) $4$ (2) $5$ (3) $6$ (4) $3$ 234. $Which of the following is a neutral complex?$ (1) $(Pt (NH_{3})_{2} Cl_{2})$ (2) $(Co (NH_{3})_{6}) Cl_{3}$ (3) $(Ni (NH_{3})_{6}) Cl_{2}$ (4) $K_{4} (Fe (CN)_{6})$ 235. $Which of the following does not show optical isomerism? (en = ethylenediamine)$ (1) $[Co(en)2Cl2]+$ (2) $[Co(NH3)3Cl3]0$ (3) $[Co(en)Cl2(NH3)2]+$ (4) $[Co(en)3]3+$ 236. $The statements that are incorrect about the nickel(II) complex of dimethylglyoxime are :(A) It is red in colour.(B) It has a high solubility in water at pH = 9 .(C) The Ni ion has two unpaired d-electrons.(D) The N - Ni - N bond angle is almost close to 90^{\circ} .(E) The complex contains four five-membered metallacycles (metal containing rings). Choose the correct answer from the options given below:$ (1) $(C) and (D) Only$ (2) $(C) and (E) Only$ (3) $(B), (C) and (E) Only$ (4) $(A), (D) and (B) Only$ 237. $Identify number of moles of donor atoms in 2 n mole of SCN^{-} ?$ (1) $3 n$ (2) $6 n$ (3) $4 n$ (4) $n$ 238. $According to crystal field theory, the M - L bond in a complex is$ (1) $purely ionic$ (2) $purely coordinate$ (3) $purely covalent$ (4) $partially covalent.$ 239. $Which one of the following has an optical isomer ? (en = ethylenediamine)$ (1) $[Zn(en)(NH3)2]2+$ (2) $[Co(en)3]3+$ (3) $[Co(H2O)4(en)]3+$ (4) $[Zn(en)2]2+$ 240. $Identify the metal ions among Co^{2 +}, Ni^{2 +}, Fe^{2 +}, V^{3 +} and Ti^{2 +} having a spin-only magnetic moment value more than 3.0 BM . The sum of unpaired electrons present in the high spin octahedral complexes formed by those metal ions is____.$