Top 75 Most Repeated Chemistry Questions in NEET with Answers (PYQ Based)

NEET UG 2026 – Top 75 Most repeated Chemistry Questions: Download PDF

Practising frequently asked questions is an effective way to prepare for NEET 2026 Chemistry. This section provides a PDF of the top 75 chemistry questions repeated in NEET. These questions focus on high-weightage chemistry chapters and commonly tested concepts. Regular practice will help improve accuracy and confidence.

Top 75 Most Repeated Chemistry Questions in NEET

Top Chemistry Questions Repeated in NEET - Sample Questions

Q1.

Match List I with List II.

List I
A. Haber process
B. Wacker oxidation
C. Wilkinson catalyst
D. Ziegler catalyst

List II
I. Fe catalyst
II. $PdCl_2$
III. $[(PPh_3)_3RhCl]$
IV. $TiCl_4$ with $Al(CH_3)_3$

Choose the correct answer from the options given below:

1. A–I, B–IV, C–III, D–II
2. A–I, B–II, C–IV, D–III
3. A–II, B–III, C–I, D–IV
4. A–I, B–II, C–III, D–IV

Correct Answer: 4

Explanation:
Haber process uses Fe catalyst.
Wacker oxidation uses $PdCl_2$.
Wilkinson catalyst is $[(PPh_3)_3RhCl]$.
Ziegler–Natta catalyst uses $TiCl_4$ with $Al(CH_3)_3$.

Q2.

Which of the following complexes are paramagnetic?

(a) $[NiCl_4]^{2-}$
(b) $Ni(CO)_4$
(c) $[Ni(CN)_4]^{2-}$
(d) $[Ni(H_2O)_6]^{2+}$
(e) $Ni(PPh_3)_4$

Options:

1. (a), (d) and (e)
2. (a) and (c)
3. (b) and (e)
4. (a) and (d)

Correct Answer: 4

Explanation:
$[NiCl_4]^{2-}$ is tetrahedral, high spin → paramagnetic.
$[Ni(H_2O)_6]^{2+}$ is octahedral, high spin → paramagnetic.
Other complexes are low spin or have paired electrons.

Q3.

The correct order of wavelength of light absorbed by the following complexes is:

A. $[Co(NH_3)_6]^{3+}$
B. $[Co(CN)_6]^{3-}$
C. $[Cu(H_2O)_4]^{2+}$
D. $[Ti(H_2O)_6]^{3+}$

Options:

1. $C < A < D < B$
2. $B < D < A < C$
3. $B < A < D < C$
4. $C < D < A < B$

Correct Answer: 3

Explanation:
Stronger ligand field → larger $\Delta$ → smaller wavelength.
Ligand strength order: $CN^- > NH_3 > H_2O$.
Thus, wavelength order:
$[Co(CN)_6]^{3-} < [Co(NH_3)_6]^{3+} < [Ti(H_2O)_6]^{3+} < [Cu(H_2O)_4]^{2+}$.

Q4.

Given below are two statements:

Statement I: $[Co(NH_3)_6]^{3+}$ is a homoleptic complex whereas $[Co(NH_3)_4Cl_2]^+$ is a heteroleptic complex.

Statement II: $[Co(NH_3)_6]^{3+}$ has only one kind of ligand while $[Co(NH_3)_4Cl_2]^+$ has more than one kind of ligand.

Choose the correct option:

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

Correct Answer: 1

Explanation:
Homoleptic complexes contain only one type of ligand.
Heteroleptic complexes contain more than one type of ligand.
Both statements correctly describe the complexes.

Q5.

The total number of stereoisomers for the complex
$[Cr(ox)_2ClBr]^{3-}$ (ox = oxalate) is:

Options:

1. 3
2. 1
3. 4
4. 2

Correct Answer: 1

Explanation:
This complex shows both geometrical and optical isomerism.
Total stereoisomers possible = 3.

Q6.

Which of the following complexes will exhibit maximum attraction towards an applied magnetic field?

Options:

1. $[Zn(H_2O)_6]^{2+}$
2. $[Ni(H_2O)_6]^{2+}$
3. $[Co(en)_3]^{3+}$
4. $[Co(H_2O)_6]^{2+}$

Correct Answer: 4

Explanation:
$[Co(H_2O)_6]^{2+}$ is a high-spin $d^7$ complex with three unpaired electrons, giving maximum paramagnetism.

Q7.

The correct IUPAC name of the given complex is:

Options:

1. diaquasilver(II) dicyanidoargentate(II)
2. dicyanidosilver(I) diaquaargentate(I)
3. diaquasilver(I) dicyanidoargentate(I)
4. dicyanidosilver(II) diaquaargentate(II)

Correct Answer: 3

Explanation:
Oxidation state of silver is +1.
Cation is named first followed by anion.
Correct name is diaquasilver(I) dicyanidoargentate(I).

Q8.

Identify the major product formed in the following reaction sequence:

$CH_3CH_2CH_2I \xrightarrow{NaCN} A \xrightarrow{OH^-} B \xrightarrow{Br_2/NaOH} C$

Options:

1. Propylamine
2. Butylamine
3. Butanamide
4. $\alpha$-bromobutanoic acid

Correct Answer: 1

Explanation:
$NaCN$ forms nitrile.
Partial hydrolysis gives amide.
Hoffmann bromamide reaction reduces carbon chain by one, forming propylamine.

Q9.

3-Methylhex-2-ene reacts with HBr in the presence of peroxide to form an additional product A. The number of possible stereoisomers of A is:

Options:

1. 4
2. 3
3. 1
4. 2

Correct Answer: 1

Explanation:
Anti-Markovnikov addition produces a product with two chiral centers.
Number of stereoisomers $= 2^2 = 4$.

Q10.

Given below are two statements:

Statement I: Tropolone is an aromatic compound and has $8\pi$ electrons.
Statement II: $\pi$ electrons of the $>C=O$ group in tropolone are involved in aromaticity.

Choose the correct option:

1. Statement I is false but Statement II is true
2. Statement I is true but Statement II is false
3. Both Statement I and Statement II are true
4. Both Statement I and Statement II are false

Correct Answer: 2

Explanation:
Tropolone has $8\pi$ electrons (6 endocyclic and 2 exocyclic).
$\pi$ electrons of the carbonyl group do not participate in aromaticity.

Do Exact Questions Repeat in NEET Chemistry?

The National Testing Agency does not usually repeat exact previous year NEET Chemistry questions. However, the underlying concepts, formulas, and reaction types are repeated frequently. This is why practising standard and previously asked question patterns becomes extremely important. Regular question practice will help students recognise familiar concepts quickly during the NEET 2026 exam and apply the correct approach without wasting time.

How These Top 75 Chemistry Questions Are Selected for NEET 2026

These Top 75 Chemistry questions are selected after analysing previous years’ NEET question papers and identifying concepts that are repeatedly tested. The focus is on high-weightage chapters, commonly asked formulas, reactions, and question patterns. Each question is chosen to represent concepts that appear in different forms across multiple NEET exams.

High-Weightage Chapters in NEET Chemistry

Knowing the NEET Chemistry high-weightage chapters helps aspirants prioritise important topics. It also helps in better preparation based on trends from the last five years’ question papers.

Importance of Practicing These Top 75 Chemistry Questions For NEET 2026

Practising the Top 75 Chemistry questions helps students focus on the most important and frequently tested concepts for NEET 2026.

• Covers high-weightage and repeated concepts

• Improves conceptual clarity and problem-solving skills

• Reduces exam fear by familiarising with question patterns

• Saves time by avoiding unnecessary topics

• Boosts accuracy and overall Chemistry score

Strategies to Score High in NEET Chemistry 2026

Scoring high in NEET Chemistry requires a smart and focused approach rather than studying everything at once. Follow these strategies to improve accuracy and confidence for NEET 2026:

• Start with the NCERT textbooks and revise them multiple times

• Focus more on high-weightage chapters and repeated concepts

• Practice previous year questions and concept-based NEET MCQs daily

• Make short notes for NEET chemistry formulas, reactions, and key points

• Take regular mock tests and analyse mistakes carefully

• Avoid learning new topics in the final days and focus on revision