NEET Coordination Compounds PYQ practice sheet

19 previous-year NEET Chemistry questions from Coordination Compounds, newest papers first. Coordination Compounds carries 26 of the Chemistry questions in NEET 2020 to 2026, so this is a good place to test yourself after revising the chapter. Marking: +4 correct, −1 wrong.

1. 1.

   RE-NEET 2026

   Given below are two statements: Statement-I : $[\mathrm{Fe(ox)_3}]^{3-}$ is chiral. Statement-II : $trans-[\mathrm{Cr(H_2O)_2(ox)_2}]^{-}$ is chiral. (Given : $\mathrm{oxH_2 = HOOC - COOH}$) In light of the above statements, choose the most appropriate answer from the options given below:

   • (A)
     Both Statement-I and Statement-II are correct
   • (B)
     Both Statement-I and Statement-II are incorrect
   • (C)
     Statement-I is correct but Statement-II is incorrect
   • (D)
     Statement-I is incorrect but Statement-II is correct
2. 2.

   RE-NEET 2026

   According to crystal field theory, the correct order of ligands with respect to their decreasing order of field strength is

   • (A)
     $\mathrm{Cl^- > NH_3 > H_2O > CO}$
   • (B)
     $\mathrm{Cl^- > H_2O > NH_3 > CO}$
   • (C)
     $\mathrm{CO > NH_3 > H_2O > Cl^-}$
   • (D)
     $\mathrm{CO > H_2O > NH_3 > Cl^-}$
3. 3.

   RE-NEET 2026

   Among the species given below, the spin-only magnetic moment is highest for (Given: Atomic number of Ti = 22, Mn = 25, Fe = 26 and Co = 27)

   • (A)
     $[\mathrm{Mn(CN)_6}]^{3-}$
   • (B)
     $[\mathrm{Ti(H_2O)_6}]^{3+}$
   • (C)
     $[\mathrm{Fe(CN)_6}]^{3-}$
   • (D)
     $[\mathrm{Co(NH_3)_6}]^{3+}$
4. 4.

   RE-NEET 2026

   The formula of tetraammineaquachloridocobalt(III) chloride is

   • (A)
     $[\mathrm{Co(NH_3)_4(H_2O)Cl}]\mathrm{Cl}$
   • (B)
     $[\mathrm{Co(NH_3)_4}]\mathrm{Cl_3} \times \mathrm{H_2O}$
   • (C)
     $[\mathrm{Co(NH_3)_4Cl_2}] \times \mathrm{H_2O}$
   • (D)
     $[\mathrm{Co(NH_3)_4(H_2O)Cl}]\mathrm{Cl_2}$
5. 5.

   RE-NEET 2026

   The complex which has facial and meridional isomers is (Given : py = pyridine and en = $\mathrm{H_2N - CH_2 - CH_2 - NH_2}$)

   • (A)
     $[\mathrm{Co(NH_3)_4(H_2O)_2}]^{3+}$
   • (B)
     $[\mathrm{Ni(en)_2(H_2O)_2}]^{2+}$
   • (C)
     $[\mathrm{Cr(py)_3(Cl)_3}]$
   • (D)
     $[\mathrm{Cr(H_2O)_6}]^{3+}$
6. 6.

   RE-NEET 2026

   A $1 : 3$ electrolyte in an aqueous solution is

   • (A)
     $[\mathrm{Co(NH_3)_3(NO_2)_3}]$
   • (B)
     $[\mathrm{CoCl(NH_3)_5}]\mathrm{Cl_2}$
   • (C)
     $[\mathrm{CoCl_2(NH_3)_4}]\mathrm{Cl}$
   • (D)
     $[\mathrm{Co(NH_3)_6}]\mathrm{Cl_3}$
7. 7.

   NEET 2026

   Match List I with List II: List-I (Complex): A. $[\mathrm{Pt(NH_3)_2Cl_2}]$, B. $[\mathrm{Co(en)_3}]^{3+}$, C. $[\mathrm{Co(NH_3)_5NO_2}]\mathrm{Cl_2}$, D. $[\mathrm{Cr(H_2O)_6}]\mathrm{Cl_3}$ List-II (Type of isomerism): I. Optical, II. Solvate, III. Geometrical, IV. Linkage Choose the correct answer from the options given below:

   • (A)
     A-I, B-III, C-II, D-IV
   • (B)
     A-III, B-I, C-IV, D-II
   • (C)
     A-III, B-I, C-II, D-IV
   • (D)
     A-II, B-IV, C-III, D-I
8. 8.

   NEET 2026

   Which one of the following is an ambidentate ligand?

   • (A)
     Oxalate
   • (B)
     Thiocyanate
   • (C)
     Ethylenediaminetetraacetate ion
   • (D)
     Ethane-1,2-diamine
9. 9.

   NEET 2026

   Match List I with List II: List I (Complex/ion): A. $[\mathrm{Pt(Cl_2)(NH_3)_2}]$, B. $[\mathrm{Co(NH_3)_6}]\mathrm{Cl_3}$, C. $[\mathrm{NiCl_4}]^{2-}$, D. $[\mathrm{Fe(CO)_5}]$ List II (Shape/geometry): I. Octahedral, II. Trigonal bipyramidal, III. Square planar, IV. Tetrahedral Choose the correct answer from the options given below:

   • (A)
     A-IV, B-I, C-III, D-II
   • (B)
     A-I, B-III, C-IV, D-II
   • (C)
     A-III, B-I, C-IV, D-II
   • (D)
     A-III, B-IV, C-I, D-II
10. 10.

    NEET 2024

    Given below are two statements: Statement I: Both $[\mathrm{Co(NH_3)_6}]^{3+}$ and $[\mathrm{CoF_6}]^{3-}$ complexes are octahedral but differ in their magnetic behaviour. Statement II: $[\mathrm{Co(NH_3)_6}]^{3+}$ is diamagnetic whereas $[\mathrm{CoF_6}]^{3-}$ is paramagnetic. In the light of the above statements, choose the correct answer from the options given below:

    • (A)
      Statement I is true but Statement II is false.
    • (B)
      Both Statement I and Statement II are true.
    • (C)
      Statement I is false but Statement II is true.
    • (D)
      Both Statement I and Statement II are false.
11. 11.

    NEET 2024

    Match List-I with List-II. List-I (Complex): A. $[\mathrm{Co(NH_3)_5(NO_2)}]\mathrm{Cl_2}$, B. $[\mathrm{Co(NH_3)_5(SO_4)}]\mathrm{Br}$, C. $[\mathrm{Co(NH_3)_6}][\mathrm{Cr(CN)_6}]$, D. $[\mathrm{Co(H_2O)_6}]\mathrm{Cl_3}$ List-II (Type of isomerism): I. Solvate isomerism, II. Linkage isomerism, III. Ionization isomerism, IV. Coordination isomerism Choose the correct answer from the options given below:

    • (A)
      A-II, B-IV, C-III, D-I
    • (B)
      A-I, B-III, C-IV, D-II
    • (C)
      A-II, B-III, C-IV, D-I
    • (D)
      A-I, B-IV, C-III, D-II
12. 12.

    NEET 2024

    Given below are two statements: Statement I: $[\mathrm{Co(NH_3)_6}]^{3+}$ is a homoleptic complex whereas $[\mathrm{Co(NH_3)_4Cl_2}]^{+}$ is a heteroleptic complex. Statement II: Complex $[\mathrm{Co(NH_3)_6}]^{3+}$ has only one kind of ligands but $[\mathrm{Co(NH_3)_4Cl_2}]^{+}$ has more than one kind of ligands. In the light of the above statements, choose the correct answer from the options given below:

    • (A)
      Both Statement I and Statement II are true.
    • (B)
      Statement I is true but Statement II is false.
    • (C)
      Both Statement I and Statement II are false.
    • (D)
      Statement I is false but Statement II is true.
13. 13.

    NEET 2023

    Homoleptic complex from the following complexes is :

    • (A)
      Triamminetriaquachromium (III) chloride
    • (B)
      Potassium trioxalatoaluminate (III)
    • (C)
      Diamminechloridonitrito - N - platinum (II)
    • (D)
      Pentaamminecarbonatocobalt (III) chloride
14. 14.

    NEET 2022

    The IUPAC name of the complex $[\mathrm{Ag(H_2O)_2}][\mathrm{Ag(CN)_2}]$ is:

    • (A)
      diaquasilver(I) dicyanidoargentate(I)
    • (B)
      dicyanidosilver(II) diaquaargentate(II)
    • (C)
      diaquasilver(II) dicyanidoargentate(II)
    • (D)
      dicyanidosilver(I) diaquaargentate(I)
15. 15.

    NEET 2022

    The order of energy absorbed, which is responsible for the colour of complexes (A) $[\mathrm{Ni(H_2O)_2(en)_2}]^{2+}$ (B) $[\mathrm{Ni(H_2O)_4(en)}]^{2+}$ (C) $[\mathrm{Ni(en)_3}]^{2+}$ is:

    • (A)
      (B) > (A) > (C)
    • (B)
      (A) > (B) > (C)
    • (C)
      (C) > (B) > (A)
    • (D)
      (C) > (A) > (B)
16. 16.

    NEET 2021

    Ethylene diaminetetraacetate (EDTA) ion is :

    • (A)
      Tridentate ligand with three 'N' donor atoms
    • (B)
      Unidentate ligand
    • (C)
      Bidentate ligand with two 'N' donor atoms
    • (D)
      Hexadentate ligand with four 'O' and two 'N' donor atoms
17. 17.

    NEET 2021

    Choose the correct answer from the options given below.

    • (A)
      (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
    • (B)
      (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
    • (C)
      (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
    • (D)
      (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
18. 18.

    NEET 2020

    Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?

    • (A)
      $\mathrm{SCN^-} < \mathrm{F^-} < \mathrm{C_2O_4^{2-}} < \mathrm{CN^-}$
    • (B)
      $\mathrm{SCN^-} < \mathrm{F^-} < \mathrm{CN^-} < \mathrm{C_2O_4^{2-}}$
    • (C)
      $\mathrm{F^-} < \mathrm{SCN^-} < \mathrm{C_2O_4^{2-}} < \mathrm{CN^-}$
    • (D)
      $\mathrm{CN^-} < \mathrm{C_2O_4^{2-}} < \mathrm{SCN^-} < \mathrm{F^-}$
19. 19.

    NEET 2020

    Urea reacts with water to form A which will decompose to form B. B when passed through $\mathrm{Cu^{2+}}$ (aq), deep blue colour solution C is formed. What is the formula of C from the following?

    • (A)
      $\mathrm{CuSO_4}$
    • (B)
      $[\mathrm{Cu(NH_3)_4}]^{2+}$
    • (C)
      $\mathrm{Cu(OH)_2}$
    • (D)
      $\mathrm{CuCO_3\cdot Cu(OH)_2}$