Top 20 Most Important NEET Chemistry Questions: Download PDF

Important NEET Questions Chemistry 2026: Weightage Analysis

The NEET 2026 chemistry has all three parts, which are Physical, Organic, and Inorganic Chemistry from Class 11 and Class 12. The table below shows the last 5 years weighatge analysis of NEET chemistry important chapters. Aspirants will also get to know the difficulty level of NEET chemistry important questions.

The data is from past five years and chapters States of Matter, Hydrogen, The s-Block Element, Solid State, Surface Chemistry, Polymers, Environmental Chemistry, General Principles and Processes of Isolation of Elements are not in the NEET syllabus now

Important NEET Chemistry Questions with Answers 2026 PDF

This part is a combination of concept, numerical, and application-type questions of Physical, Organic, and Inorganic Chemistry. These are the most commonly asked questions. This will not only improve your NEET preparation but also improve speed and accuracy during the exam. We have presented here the most relevant NEET Chemistry questions along with detailed answers so that you can approach the exam questions confidently and effectively.

Ques:

Given below are two statements :

Statement I : A hypothetical diatomic molecule with bond order zero is quite stable. Statement II : As bond order increases, the bond length increases.

In the light of the above statements, choose the most appropriate answer from the options given below :

Option 1) Statement 1 is false but Statement II is true

Option 2) Both Statement I and Statement II are true

Option 3) Both Statement I and Statement II are false

Option 4) Statement 1 is true but Statement II is false

Chapter - Chemical bonding and molecular structure

Difficulty level - Easy

Solution -

A bond order of zero means no net bonding between the atoms, indicating the molecule cannot exist or is highly unstable. so the first statement is false

As bond order increases, bond length decreases because stronger bonding pulls the atoms closer together. and also the second statement is false

So the correct answer is (3) Both Statement I and Statement II are false

Hence, the correct answer is option (3).

Ques:

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) :

undergoes SN2 reaction faster than

Reason ( RR ) : lodine is a better leaving group because of its large size.
In the light of the above statements, choose the correct answer from the options given below :

Option 1) A is false but R is true

Option 2) Both A and R are true and R is the correct explanation of A

Option 3) Both A and R are true but R is not the correct explanation of A

Option 4) A is true but R is false

Chapter - Haloalkanes and Haloarenes

Difficulty level - Medium

Solution -

Rate α [RX][Z^-]

where Z^- is the leaving group

Since iodide is a better leaving group than chloride so the SN² reaction will be faster in the iodobutane.

The larger size of iodine results in a weaker bond between iodine and the carbon atom it's attached to that makes it easier to dissociate and leave during a reaction.

Hence, the correct answer is option (2).

Ques:

C( s)+2H2( g)→CH4( g);ΔH=−74.8 kJ mol−1
Which of the following diagrams gives an accurate representation of the above reaction? [R→ reactants; P→ products ]

Option 1)

Option 2)

Option 3)

Option 4)

Chapter - Thermodynamics

Difficulty Level - Medium

Solution - Diagram 2:

- $R$ is higher than $P$

- $P$ is lower in energy

- The arrow from $P$ to $R$ is labeled $74.8$ and points upward

- This is correct because it represents the energy difference, and $\mathrm{\Delta }H=-74.8\mathrm{kJ}{\mathrm{mol}}^{-1}$.

The arrow shows that products are lower by $74.8\mathrm{kJ}{\mathrm{mol}}^{-1}$.

- It is common to show the magnitude of $\mathrm{\Delta }H$ with an upward arrow between $P$ and $R$ even in exothermic reactions, as long as positions are correct.

Hence, the correct answer is option (2).

Tips for Scoring High in NEET Chemistry 2026

To perform well in NEET Chemistry and score well, use these tried and tested techniques:

• Be well-versed with the syllabus, particularly Physical, Organic, and Inorganic Chemistry.
• Be clear on the basics and concepts, particularly in organic chemistry.
• Refer primarily to NCERT, revising each chapter intensively.
• Practice NEET chemistry MCQs for a clear concept grip.
• Practice previous years' question papers and mock tests on a regular basis to develop speed and accuracy.
• Give additional time to weaker sections for improvement.
• Have a NEET Chemistry formula sheet for instant revision.
• Use mnemonics to improve retention in Organic and Inorganic Chemistry.
• Resolve doubts immediately through teachers, friends, or mentors.
• Reserve specific time for constant revision, especially of weak points.
• In the examination, try easier questions first to conserve time and gain confidence.
• Don't make wild guesses to avoid negative marking.