You are currently viewing NEET Previous Year Chemistry Questions Coordination Compounds

NEET Previous Year Chemistry Questions Coordination Compounds

1. The correct order of the stoichiometries of AgCl formed when AgNO3 in excess is treated with the complexes : CoCl3.6NH3, CoCl3.5NH3, CoCl3.4NH3 respectively is              (NEET 2017)

(a) 3AgCl, 1AgCl, 2AgCl

(b) 3AgCl, 2AgCl, 1AgCl

(c) 2AgCl, 3AgCl, 2AgCl

(d) 1AgCl, 3AgCl, 2AgCl

2. Cobalt(III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at 25°C?                      (2015)

(a) CoCl3 · 5NH3                       (b) CoCl3 · 6NH3

(c) CoCl3 . 3NH3                       (d) CoCl3 · 4NH3

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3. An excess of AgNO3 is added to 100 mL of a 0.01 M solution of dichlorotetraaquachromium(III) chloride. The number of moles of AgCl precipitated would be                                               (NEET 2013)

(a) 0.003         (b) 0.01

(c) 0.001        (d) 0.002

4. Which of the following will exhibit maximum ionic conductivity?                           (2001)

(a) K4[Fe(CN)6]         (b) [Co(NH3)6]Cl3

(c) [Cu(NH3)4]Cl2        (d) [Ni(CO)4]

6. The correct increasing order of trans-effect of the following species is (2016)

(a) NH3 > CN > Br > C6H5

(b) CN > C6H5 > Br > NH3

(c) Br > CN > NH3 > C6H5

(d) CN > Br > C6H5 > NH3

7. The sum of coordination number and oxidation number of the metal M in the complex [M(en)2(C2O4)]Cl (where en is ethylene diamine) is           (2015)

(a) 6                            (b) 7

(c) 8                            (d) 9

8. The anion of acetyl acetone (acacia) forms Co(acacia)3 Chelate with Co3+. The rings of the chelate are                                                                    (2013)

(a) Five membered     (b) four membered

(c) Six membered       (d) three membered

13. The name of complex ion, [Fe(CN)6]3– is                              (2015)

(a) Hexacyanitoferrate(III) ion

(b) Tricyanoferrate (III) ion

(c) Hexacyanidoferrate (III) ion

(d) Hexacyanoiron (III) ion.

14. The correct IUPAC name for [CrF2(en)2]Cl is                                 (2013)

(a) Chlorodifluoridoethylenediaminechromium (III) chloride

(b) Difluoridobis (ethylene diamine) chromium (III) Chloride

(c) difluorobis-(ethylene diamine) chromium (III) Chloride

(d) Chlorodifluoridobis (ethylene diamine) Chromium (III).

18. The type of isomerism shown by the complex [CoCl2(en)2] is   (NEET2018)

(a) Geometrical isomerism

(b) Coordination isomerism

(c) Ionization isomerism

(d) Linkage isomerism

19. Number of possible isomers for the complex [Co(en)2Cl2]Cl will be (en = ethylene diamine)                                                                               (2015)

(a) 1                                           (b) 3

(c) 4                                           (d) 2

20. The complexes [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] are the examples of which type of isomerism?                                        (2011)

(a) Linkage isomerism

(b) Ionization isomerism

(c) Coordination isomerism

(d) Geometrical isomerism

21. The complex, [Pt(py)(NH3)BrCl] will have how many geometrical isomers? (2011)

(a) 3                (b) 4

(c) 0                (d) 2

22. The existence of two different colored complexes with the composition of [Co(NH3)4Cl2]+ is due to                                                         (2010)

(a) Linkage isomerism

(b) Geometrical isomerism

(c) Coordination isomerism

(d) Ionization isomerism.

23. Which one of the following complexes is not? Expected to exhibit isomerism? (2010)

(a) [Ni(NH3)4(H2O)2]2+                (b) [Pt(NH3)2Cl2]

(c) [Ni(NH3)2Cl2]                       (d) [Ni(en)3]2+

24. Which of the following does not show optical isomerism?    (2009)

(a) [Co (NH3)3Cl3]0

(b) [Co (en)Cl2(NH3)2]+

(c) [Co (en)3]3+

(d) [Co (en)2Cl2]+(en = ethylenediamine)

25. Which of the following will give a pair of enantiomorphism?           (2007)

(a) [Cr(NH3)6][Co(CN)6]

(b) [Co(en)2Cl2]Cl

(c) [Pt(NH3)4 ][PtCl6]

(d) [Co(NH3)4Cl2]NO2

(en = NH2CH2CH2NH2)

26. [Co(NH3)4(NO2)2]Cl exhibits                                                                     (2006)

(a) Linkage isomerism, geometrical isomerism and optical isomerism

(b) Linkage isomerism, ionization isomerism and optical isomerism

(c) Linkage isomerism, ionization isomerism and geometrical isomerism

(d) Ionization isomerism, geometrical isomerism and optical isomerism.

34. Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?                                                                            (NEET 2020)

(a) SCN < F < C2O42− < CN

(b) SCN < F < CN < C2O42−

(c) F < SCN < C2O42− < CN

(d) CN < C2O42− < SCN < F

35. What is the correct electronic configuration of the central atom in K4[Fe(CN)6] based on crystal field theory?                                                                                     (NEET 2019)

(a) e3t32

(a) e4t22

(a) t42ge2g

(a) t62ge0g

36. Aluminium chloride in acidified aqueous solution forms a complex ‘A’, in which hybridisation state of Al is ‘B’. What are ‘A’ and ‘B’, respectively ?                               (NEET 2019)

(a) [Al(H2O)6]3+, sp3d2

(b) [Al(H2O)4]3+, sp3

(c) [Al(H2O)4]3+, dsp2

(d) [Al(H2O)6]3+, d2sp3

37. The crystal field stabilisation energy (CFSE) for [CoCl6]4– is 18000 cm–1. The CFSE for [CoCl4]2– will be                                                                                   (Odisha NEET 2019)

(a) 6000 cm–1                  (b) 16000 cm–1

(c) 18000 cm–1                (d) 8000 cm–1

38. The geometry and magnetic behavior of the complex [Ni(CO)4] are       (NEET 2018)

(a) Square planar geometry and diamagnetic

(b) Tetrahedral geometry and diamagnetic

(c) Square planar geometry and paramagnetic

(d) Tetrahedral geometry and paramagnetic.

39. Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co3+ is                                                                            (NEET 2017)

(a) [Co(H2O)6]3+, [Co(en)3 ]3+, [Co(NH3)6]3+

(b) [Co(H2O)6]3+, [Co(NH3)6]3+, [Co(en)3]3+

(c) [Co(NH3)6]3+, [Co(en)3]3+, [Co(H2O)6]3+

(d) [Co(en)3]3+, [Co(NH3)6]3+, [Co(H2O)6]3+

40. Pick out the correct statement with respect to [Mn(CN)6]3–.       (NEET 2017)

(a) It I s sp3d2 hybridized and tetrahedral.

(b) It I s d2sp3 hybridized and octahedral.

(c) It I s dsp2 hybridized and square planar.

(d) It I s sp3d2 hybridized and octahedral

41. Jahn–Teller effect is not observed in high spin of increasing field strength of ligands to form complexes of 8 coordination compounds?                                               (NEET-II 2016)

(a) d7                 (b) d8

(c) d4                (d) d9

42. The hybridization involved in complex [Ni(CN)4]2– is (At. No. Ni = 28) (2015)

(a) sp3                (b) d2sp2

(c) d2sp3             (d) dsp2

43. Among the following complexes the one which shows zero crystal field stabilization energy (CFSE) is                                                                (2014)

 (a) [Mn(H2O)6]3+                   (b) [Fe(H2O)6 ]3+

(c) [Co(H2O)6]2+                 (d) [Co(H2O)6]3+