NEET UG · ChemistryUpdated 19 Oct 2026

NEET Chemistry PYQs and chapter-wise weightage

NEET UG Chemistry covers 26 chapters with 707 tagged previous-year questions and 9,148 calibrated questions in the ViJEEta bank. Every chapter is ranked below by its share of its subject's tagged NEET PYQs in the bank (NEET 2013–2026; repeated questions counted once). ★ is exam importance by that share, not difficulty.

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Q1ChemistryNEET UG PYQVSEPR Theory

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Predicted the correct order of repulsion among the following :

Answer key (B) & worked solution

Correct answer: Option B

The order of repulsion force according to VSEPR theory : lone pair-lone pair > lone pair-bond pair > bond pair – bond pair

Q2ChemistryNEET UG PYQMolecular Orbital Theory

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Which of the following diatomic molecular species has only π bonds according to Molecular Orbital Theory ?

Answer key (B) & worked solution

Correct answer: Option B

MO configuration C

_{2}

is :

σ 1 s^{2}, σ * 1 s^{2}, σ 2 s^{2}, σ * 2 s^{2}, π 2 p_{x}^{2} = π 2 p_{y}^{2}

Q3ChemistryNEET UG PYQElectrovalent or Ionic Bond

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The ionic radii of A

^{+}

and B

^{-}

ions are 0.98 × 10−10m and 1.81 × 10−10 m. The coordination number of each ion in AB is:

Answer key (B) & worked solution

Correct answer: Option B

\frac{r _{A +}}{r _{B +}} = \frac{0.98 \times 10 ^{- 10}}{1.81 \times 10 ^{- 10}} = 0.54

\frac{r ^{+}}{r ^{-}}

is in range 0.414 – 0.732 so octahedral. Co-ordination no. of each ion is 6 like NaCl structure.

Chemistry chapters ranked by measured NEET weight

#	Chapter	Weight (/100 of Chemistry)	Exam importance (★)	PYQ count	Practice pool	Action
1	Chemical Bonding and Molecular Structure	9.2	★★★★★	65	679	PYQs & test →
2	Coordination Compounds	6.5	★★★★☆	46	517	PYQs & test →
3	Hydrocarbons	5.9	★★★★☆	42	505	PYQs & test →
4	Solutions	5.7	★★★★☆	40	461	PYQs & test →
5	Alcohols, Phenols, and Ethers	5.0	★★★★☆	35	478	PYQs & test →
6	Chemical Kinetics	4.5	★★★★☆	32	411	PYQs & test →
7	d- and f-Block Elements	4.4	★★★☆☆	31	365	PYQs & test →
8	Electrochemistry	4.2	★★★☆☆	30	453	PYQs & test →
9	Thermodynamics	4.2	★★★☆☆	30	517	PYQs & test →
10	Amines	4.1	★★★☆☆	29	393	PYQs & test →
11	Biomolecules	4.1	★★★☆☆	29	278	PYQs & test →
12	Aldehydes and Ketones	4.0	★★★☆☆	28	449	PYQs & test →
13	p-Block Elements (Group 15 to 18)	3.5	★★★☆☆	25	262	PYQs & test →
14	Ionic Equilibrium	3.4	★★★☆☆	24	419	PYQs & test →
15	Some Basic Concepts of Chemistry	3.4	★★★☆☆	24	417	PYQs & test →
16	Structure of an Atom	3.4	★★★☆☆	24	435	PYQs & test →
17	Classification of Elements and Periodicity	3.1	★★★☆☆	22	448	PYQs & test →
18	Organic Chemistry: Some Basic Principles and Techniques	3.0	★★★☆☆	21	637	PYQs & test →
19	Chemical Equilibrium	2.8	★★★☆☆	20	385	PYQs & test →
20	Redox Reactions	2.7	★★★☆☆	19	375	PYQs & test →
21	p-Block Elements (Group 13 and 14)	2.7	★★★☆☆	19	250	PYQs & test →
22	Practical Chemistry	2.5	★★★☆☆	18	249	PYQs & test →
23	Haloalkanes and Haloarenes	2.4	★★☆☆☆	17	409	PYQs & test →
24	Gasesous State*	2.1	★★☆☆☆	15	330	PYQs & test →
25	General Organic Chemistry (Revision) and Isomerism	2.0	★★☆☆☆	14	244	PYQs & test →
26	Carboxylic Acids and Derivatives	1.1	★★☆☆☆	8	278	PYQs & test →