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Coordination Compounds

Previous year questions with solutions · 2000 – 2026

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101Questions
35Papers covered
8.89% ↑33.3%Weightage in 2026
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Year-wise statistics questions · papers · average per paper · weightage
YearQuestionsPapersAvg / paperWeightage
20268248.89% ↑33.3%
20253136.67% ↑12.2%
20246235.94% ↑51.5%
20232123.92% ↓1%
20224223.96% ↓1%
20212124.00% ↑80%
20201112.22% →0%
20191112.22% ↓75%
20184148.89% →0%
20174148.89% ↑166.7%
2016321.53.33% ↓50%
20156236.67% ↑50%
20142124.44% ↓50.6%
20138248.99% ↑139.7%
2012321.53.75% ↓62%
20118249.88% ↑97.5%
20104225.00% ↑27.5%
20092123.92% →0%
20082123.92% ↓2%
20072124.00% →0%
20062124.00% →0%
20052124.00% ↓72.6%
200471714.58% ↑138.2%
20033136.12% ↓23.5%
20024148.00% ↓18.4%
20015159.80% ↑66.7%
20003135.88%

15 questions · newest paper first

1

Given below are two statements: (Given : oxH2 = HOOC - COOH) In light of the above statements, choose the most appropriate answer from the options given below:

  1. Statement I is incorrect but Statement II is correct
  2. Both Statement I and Statement II are correct
  3. Both Statement I and Statement II are incorrect
  4. Statement I is correct but Statement II is incorrect
RE-NEET (UG) 2026
2

The complex which has facial and meridional isomers is (Given : py = pyridine and en = H2N-CH2-CH2-NH2)

  1. [Ni(en)2(H2O)2]2+
  2. [Cr(py)3(Cl)3]
  3. [Cr(H2O)6]3+
  4. [Co(NH3)4(H2O)2]3+
RE-NEET (UG) 2026
3

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

  1. geometrical isomerism
  2. coordination isomerism
  3. ionization isomerism
  4. linkage isomerism
NEET 2018
4

The correct increasing order of trans-effect of the following species is

  1. NH3 > CN- > Br- > C6H5-
  2. CN- > C6H5- > Br- > NH3
  3. Br- > CN- > NH3 > C6H5-
  4. CN- > Br- > C6H5- > NH3
NEET 2016 (Phase 2)
5

Number of possible isomers for the complex [Co(en)2Cl2]Cl will be (en = ethylenediamine)

  1. 1
  2. 3
  3. 4
  4. 2
AIPMT 2015
6

In a particular isomer of [Co(NH3)4Cl2]+, the Cl-Co-Cl angle is 90 , this isomer is known as

  1. optical isomer
  2. cis-isomer
  3. position isomer
  4. linkage isomer.
NEET 2013 (Karnataka)
7

The complex, [Pt(Py)(NH3)BrCl] will have how many geometrical isomers?

  1. 3
  2. 4
  3. 0
  4. 2
AIPMT 2011 (Prelims)
8

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

  1. linkage isomerism
  2. geometrical isomerism
  3. coordination isomerism
  4. ionization isomerism.
AIPMT 2010 (Prelims)
9

Which one of the following complexes is not expected to exhibit isomerism?

  1. [Ni(NH3)4(H2O)2]2+
  2. [Pt(NH3)2Cl2]
  3. [Ni(NH3)2Cl2]
  4. [Ni(en)3]2+
AIPMT 2010 (Prelims)
10

Which of the following does not show optical isomerism? (en = ethylenediamine)

  1. [Co(NH3)3Cl3]0
  2. [Co(en)Cl2(NH3)2]+
  3. [Co(en)3]3+
  4. [Co(en)2Cl2]+
AIPMT 2009
11

Which of the following will give a pair of enantiomorphs? (en = NH2CH2CH2NH2)

  1. [Cr(NH3)6][Co(CN)6]
  2. [Co(en)2Cl2]Cl
  3. [Pt(NH3)4][PtCl6]
  4. [Co(NH3)4Cl2]NO2
AIPMT 2007
12

Which one of the following is expected to exhibit optical isomerism? (en = ethylenediamine)

  1. cis-[Pt(NH3)2Cl2]
  2. trans-[Pt(NH3)2Cl2]
  3. cis-[Co(en)2Cl2]+
  4. trans-[Co(en)2Cl2]+
AIPMT 2005
13

Which of the following coordination compounds would exhibit optical isomerism?

  1. Pentaamminenitrocobalt (III) iodide
  2. Diamminedichloroplatinum (II)
  3. trans-Dicyanobis (ethylenediamine) chromium (III) chloride
  4. tris-(Ethylenediamine) cobalt (III) bromide.
AIPMT 2004
14

Which of the following will give maximum number of isomers?

  1. [Co(NH3)4Cl2]
  2. [Ni(en)(NH3)4]2+
  3. [Ni(C2O4)(en)2]
  4. [Cr(SCN)2(NH3)4]+
AIPMT 2001
15

Which complex compound will give four isomers?

  1. [Fe(en)3]Cl3
  2. [Co(en)(NH3)2Cl2]Cl
  3. [Fe(PPh3)3NH3ClBr]Cl
  4. [Co(PPh3)3Cl]Cl3
AIPMT 2000