NEET UG · Chemistry · Coordination Compounds

Coordination Compounds: NEET previous year questions

13 questions in ten years of NEET, in 8 of 10 papers. Pattern: Every year. Here is how it is asked and which ideas come back.

Asked in 10 years: 13; about 1.3 per paper
Years asked: 8/10; last asked 2026
Chance of a question next paper: 84%; historical rate, how we compute it
Weighted estimate: 1.4; model; history: 1.2 a paper on average, typically 0–2

Key findings

01
Asked in 8 of 10 papers, 13 questions in all: #47 of 204 topics by ten-year total. It comes back every 1.3 years on average.
02
70% of its questions since 2018 tested an idea never asked before; 2 repeated an idea from the year before.
03
The most repeated idea is IUPAC Nomenclature Rules, asked 2 times (2022, 2026), usually as “iupac name of complex”.
04
NEET has asked 8 of the 80 ideas in this topic; 66 have never been asked, directly or indirectly.
05
Mostly asked as one-line MCQ (85%); 69% easy, 0% hard, and up from 1.1 to 1.6 questions a paper since 2024.

Questions per year

Up to 2023: 1.1; per paper
Since 2024: 1.6; +0.5
Usual gap: 1.3 yrs; between papers asking it
Swing: ±0.9; questions, year to year

Recent framings

write formula from IUPAC name
identify electrolyte type of complex
identify complex with minimum conductance

Revise first

Werner's Theory: Molar Conductivity Ranking (2025 2026); IUPAC Nomenclature Rules (2022 2026); Homoleptic vs Heteroleptic Complexes (2023 2024)

How it is asked

Difficulty, format and skill

Across all 13 questions on Coordination Compounds since 2017.

Difficulty

QUESTIONS

Easy9 · 69%
Medium4 · 31%
Hard0 · 0%

Format

One-line MCQ · 11 Q85%
Two statements · 2 Q15%

Skill tested

Recall · 6 Q46%
Application · 5 Q38%
Concept · 2 Q15%

Repeats

New idea, or one asked before?

Each column is a paper. Blue questions tested an idea NEET had not asked before; navy ones went back to an idea from an earlier paper. 2017 is the first paper, so everything in it counts as new.

’17’18’19’20’21’22’23’24’25’26

Idea asked for the first time
Idea asked in an earlier paper

Coverage of the topic

NEET has asked 8 of the 80 ideas in this topic. 66 have never been asked yet.

866

Asked directly8 · 10%
Touched inside another question6 · 8%
Never asked66 · 83%

Ideas come from Lumi’s syllabus map of NCERT. A never-asked idea is not a safe skip: most new questions come from exactly these.

Drill down

Idea, year, question

Every idea NEET tested in this topic, with its ten papers. Open one to read the questions.

ideaAskedShareYears’17’18’19’20’21’22’23’24’25’26

Repeated2 · 15%15%2/10
- 2024 · Q96
  Given below are two statements : Statement I : $[\mathrm{Co(NH_3)_6}]^{3+}$ is a homoleptic complex whereas $[\mathrm{Co(NH_3)_4Cl_2}]^+$ …
  easyTwo statementsAsked the year before
- 2023 · Q71
  Homoleptic complex from the following complexes is :
  easyOne-line MCQNew idea
Repeated2 · 15%15%2/10
Repeated2 · 15%15%2/10
1 · 8%8%1/10
1 · 8%8%1/10
1 · 8%8%1/10
1 · 8%8%1/10
1 · 8%8%1/10
1 · 8%8%1/10
1 · 8%8%1/10

Squares are the ten papers, 2017 to 2026; darker means more questions. Share is of the level above.

Ideas

Every idea inside this topic

10 different ideas were tested; 3 came more than once. IUPAC Nomenclature Rules is the foundation for 9 other ideas in the syllabus.

IUPAC Nomenclature Rules2×
iupac name of complex
One-line MCQ · 6% next · foundation for 9
Werner's Theory: Molar Conductivity Ranking2×
identify electrolyte type of complex
One-line MCQ · 11% next
Homoleptic vs Heteroleptic Complexes2×
identify homoleptic complex
One-line MCQ · 6% next
VBT: Magnetic Properties1×
statement i/ii on coordination compounds
Two statements · 6% next
Stepwise and Overall Stability Constants1×
identify most stable complex
One-line MCQ · 4% next
EDTA Structure and Denticity1×
identify denticity of ligand
One-line MCQ · 4% next · foundation for 1
Metal Carbonyls and Nuclearity1×
identify nuclearity of metal carbonyl
One-line MCQ · 4% next
Organometallic Compounds1×
identify example of a type
One-line MCQ · 4% next
VBT: Inner vs Outer Orbital Complexes1×
true statement selection on complex hybridisation
One-line MCQ · 4% next
Werner's Theory: Precipitation Calculations1×
precipitate stoichiometry of cobalt complexes
One-line MCQ · 4% next

Idea	Times	Format	Chance next	Foundation for
IUPAC Nomenclature Rulesiupac name of complex	2	One-line MCQApplication	6%	9 ideas
Werner's Theory: Molar Conductivity Rankingidentify electrolyte type of complex	2	One-line MCQApplication	11%	–
Homoleptic vs Heteroleptic Complexesidentify homoleptic complex	2	One-line MCQRecall	6%	–
VBT: Magnetic Propertiesstatement i/ii on coordination compounds	1	Two statementsConcept	6%	–
Stepwise and Overall Stability Constantsidentify most stable complex	1	One-line MCQConcept	4%	–
EDTA Structure and Denticityidentify denticity of ligand	1	One-line MCQRecall	4%	1 ideas
Metal Carbonyls and Nuclearityidentify nuclearity of metal carbonyl	1	One-line MCQRecall	4%	–
Organometallic Compoundsidentify example of a type	1	One-line MCQRecall	4%	–
VBT: Inner vs Outer Orbital Complexestrue statement selection on complex hybridisation	1	One-line MCQApplication	4%	–
Werner's Theory: Precipitation Calculationsprecipitate stoichiometry of cobalt complexes	1	One-line MCQApplication	4%	–

Chance next is the historical rate at which an idea with this record came back in the following paper. It is low for every idea, which is why learning the topic beats memorising past questions. All repeated ideas

Every question

Coordination Compounds questions, year by year

The opening words of each question as it appeared in the official paper, with the idea it tested.

NEET 20262 questions

Q68
The formula of tetraammineaquachloridocobalt(III) chloride is
Idea: IUPAC Nomenclature Rules
EasyOne-line MCQ
Q87
A 1:3 electrolyte in an aqueous solution is
Idea: Werner's Theory: Molar Conductivity Ranking
Asked last yearEasyOne-line MCQ

NEET 20251 question

Q63
Out of the following complex compounds, which of the compound will be having the minimum conductance in solution?
Idea: Werner's Theory: Molar Conductivity Ranking
New ideaEasyOne-line MCQ

NEET 20242 questions

Q52
Given below are two statements : Statement I : Both $[\mathrm{Co(NH_3)_6}]^{3+}$ and $[\mathrm{CoF_6}]^{3-}$ complexes are octahedral but…
Idea: VBT: Magnetic Properties
New ideaMediumTwo statements
Q96
Given below are two statements : Statement I : $[\mathrm{Co(NH_3)_6}]^{3+}$ is a homoleptic complex whereas $[\mathrm{Co(NH_3)_4Cl_2}]^+$ …
Idea: Homoleptic vs Heteroleptic Complexes
Asked last yearEasyTwo statements

NEET 20232 questions

Q71
Homoleptic complex from the following complexes is :
Idea: Homoleptic vs Heteroleptic Complexes
New ideaEasyOne-line MCQ
Q97
Which complex compound is most stable?
Idea: Stepwise and Overall Stability Constants
New ideaMediumOne-line MCQ

NEET 20221 question

Q83
The IUPAC name of the complex - $\mathrm{[Ag(H_2O)_2][Ag(CN)_2]}$ is :
Idea: IUPAC Nomenclature Rules
New ideaMediumOne-line MCQ

NEET 20211 question

Q59
Ethylene diaminetetraacetate (EDTA) ion is :
Idea: EDTA Structure and Denticity
New ideaEasyOne-line MCQ

NEET 20181 question

Q71
Iron carbonyl, $\mathrm{Fe(CO)_5}$ is
Idea: Metal Carbonyls and Nuclearity
New ideaEasyOne-line MCQ

NEET 20173 questions

Q66
The correct order of the stoichiometries of AgCl formed when $\mathrm{AgNO_3}$ in excess is treated with the complexes :…
Idea: Werner's Theory: Precipitation Calculations
EasyOne-line MCQ
Q75
An example of a sigma bonded organometallic compound is
Idea: Organometallic Compounds
EasyOne-line MCQ
Q84
Pick out the correct statement with respect to $\mathrm{[Mn(CN)_6]^{3-}}$ :
Idea: VBT: Inner vs Outer Orbital Complexes
MediumOne-line MCQ

Questions from the official NEET UG papers published by NTA (CBSE before 2019). Topic and idea tags, counts and notes are Lumi’s.