The Thermodynamics and the Gaseous State in NEET UG contribute approximately 8-10% weightage to the total Physics marks, with 2-3 questions usually asked from each topic.
Most common topics and questions of Thermodynamics and the Gaseous State from NEET UG are laws of thermodynamics, entropy, enthalpy, Gibbs free energy, ideal gas laws, and real gases.
These concepts are vital for solving problems related to heat exchange and energy efficiency. Similarly, the Gaseous State focuses on the properties and behavior of gases, including gas laws, Ideal Gas Law, Kinetic Molecular Theory, and real gases.
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Question 1:
The equilibrium state of a thermodynamic system is described by:
A. Pressure
B. Total heat
C. Temperature
D. Volume
E. Work done
Choose the answer from the options given below.
- A, B and E only
- B, C and D only
- A, B and C only
- A, C and D only
Question 2:
A carnot engine has an efficiency of 50% when its source is at a temperature 327°C. The temperature of the sink is:
- 200°C
- 27°C
- 15°C
- 100°C
Question 3:
An ideal gas undergoes four different processes from the same initial state as shown in the figure below. Those processes are adiabatic, isothermal, isobaric and isochoric. The curve which represents the adiabatic process among 1, 2, 3 and 4 is:
- 1
- 2
- 3
- 4
Question 4:
Two cylinders A and B of equal capacity are connected to each other via a stop clock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stop clock is suddenly opened. The process is:
- isothermal
- adiabatic
- isochoric
- isobaric
Question 5:
A cylinder contains hydrogen gas at pressure of 249 kPa and temperature 27 degrees C. Its density is :
(R=8.3Jmol−1K−1)
- 0.5kg/m3
- 0.2kg/m3
- 0.1kg/m3
- 0.02kg/m3
Question 6:
The correct option for free expansion of an ideal gas under adiabatic condition is :
- Δ T = 0 and w = 0, q = 0,
- Δ T < 0 and w > 0, q < 0,
- Δ T = 0 and w = 0, q > 0,
- Δ T > 0 and w > 0
Question 7:
In which of the following processes, heat is neither absorbed nor released by a system?
- isothermal
- adiabatic
- isobaric
- isochoric
Question 8:
A sample of 0.1g of water at 100 degrees C and normal pressure
(1.013×105Nm−2) requires 54cal of heat energy to convert to steam at
100 degree C. If the volume of the steam produced is 167.1cc, the change in internal energy of the sample, is
- 84.5 J
- 104.3 J
- 42.2 J
- 208.7 J
Question 9:
Thermodynamic processes are indicated in the following diagram :
| Column 1 | Column 2 | ||
|---|---|---|---|
| P. | Process I | a. | Adiabatic |
| Q. | Process II | b. | Isobaric |
| R. | Process III | c. | Isochoric |
| S. | Process IV | d. | Isothermal |
Question 10:
A refrigerator works between 4 degrees C and 30 degrees C. It is required to remove 600calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is :
(Take1cal=4.2Joules)
- 23.65 W
- 236.5 W
- 2365 W
- 2.365 W
Question 11:
A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its volume is again reduced to half. Then :
- Compressing the gas through adiabatic process will require more work to be done.
- Compressing the gas isothermally or adiabatically will require the same amount of work.
- Which of the case (whether compression through isothermal or through adiabatic process) requires more work will depend upon the atomicity of the gas.
- Compressing the gas isothermally will require more work to be done
Question 12:
A monoatomic gas at a pressure P, having a volume V expands isothermally to a volume 2V and then adiabatically to a volume 16V. The final pressure of the gas is:
NEET Physics Paper Pattern 2025
The National Testing Agency (NTA) has made official declarations about the major changes in the examination pattern and duration of NEET (UG) 2025, it has returned to its pre-COVID format. The clarification was issued on January 25, 2025.
- The question paper will comprise 180 compulsory questions and there will be no optional questions under Section B, a format adopted temporarily during the COVID-19 pandemic.
- Both Physics and Chemistry shall be allocated 45 questions, while Biology will contain 90 questions, as distributed.
- These shall be a timed examination and candidates are to complete the examination in strict 180 minutes or 3 hours.
This again signifies the adopted standardized structure by omitting extra time and flexibility implemented during the pandemic period. With the new format, aspirants need to concentrate on adequate preparation to make full use of the important sections.
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NEET Exam Pattern: Evaluation and Marking Scheme
The table below summarizes the evaluation process and marking scheme for Section A and Section B in NEET 2025:
| Criteria | Section A (MCQs) | Section B (MCQs) |
|---|---|---|
| Questions to Attempt | All 180 questions are compulsory. | No optional questions; all 45 in Physics, 45 in Chemistry, and 90 in Biology are mandatory. |
| Correct Answer | +4 marks | +4 marks |
| Incorrect Answer | -1 mark | -1 mark |
| Unanswered | 0 marks | 0 marks |
| More Than One Correct Option | +4 marks awarded to candidates selecting any correct option. | +4 marks awarded to candidates selecting any correct option. |
| All Options Found Correct | +4 marks awarded to all candidates who attempt the question. | +4 marks awarded to all candidates who attempt the question. |
| Incorrect or Dropped Question | +4 marks awarded to all candidates, whether or not the question was attempted. | +4 marks awarded to all candidates, whether or not the question was attempted. |
| Use of Constants in Calculations | Candidates should strictly use constants provided in the question for calculations. | Candidates should strictly use constants provided in the question for calculations. |
NEET 2025 Mark Distribution
| Sections | Number of Questions | Total Marks |
|---|---|---|
| Physics Section A | 45 | 180 |
| Chemistry Section A | 45 | 180 |
| Biology Section A | 90 | 360 |
| Total | 180 | 720 |
“This distribution reflects the new pattern with emphasis on compulsory questions in all subjects.”
NEET Exam Pattern – Difficulty Level of Question Paper
Understanding the difficulty level of the NEET question paper is essential for effective preparation. Analyzing the NEET 2024 exam provides candidates valuable insights into topic-wise weightage and section-specific challenges, enabling them to focus on high-priority areas. Below is a detailed analysis of the NEET 2024 Exam to help aspirants preparing for NEET 2025:
| Details | NEET 2024 Exam Analysis |
|---|---|
| Overall Difficulty Level | Easy to Moderate |
| Physics Difficulty Level | Moderate |
| Chemistry Difficulty Level | Tough |
| Biology Difficulty Level | Easy but lengthy |
| Most Difficult Section | Chemistry |
| Easiest Section | Zoology and Botany |
| Difficult Sections | Chemistry and Botany |
| Good Attempts for NEET 2024 | 170+ |
NEET Physics Syllabus: Chapter-Wise Weightage
| Chapter | Approximate Weightage (%) |
|---|---|
| High Weightage Chapters (8-10 questions) | |
| Laws of Motion | 8-10% |
| Work, Power, and Energy | 8-10% |
| Circular Motion | 8-10% |
| Electric Charges and Fields | 8-10% |
| Electrostatic Potential and Capacitance | 8-10% |
| Ray Optics and Optical Instruments | 8-10% |
| Wave Optics | 8-10% |
| Atomic Structure | 8-10% |
| Nuclei | 8-10% |
| Laws of Thermodynamics | 8-10% |
| Medium Weightage Chapters (5-7 questions) | |
| Units and Measurements | 5-7% |
| Kinematics | 5-7% |
| Current Electricity | 5-7% |
| Magnetic Effects of Current | 5-7% |
| Electromagnetic Induction | 5-7% |
| Oscillations and Waves | 5-7% |
| Low Weightage Chapters (1-3 questions) | |
| Gravitation | 1-3% |
| Fluid Mechanics | 1-3% |
| Electromagnetic Waves | 1-3% |
NEET Physics Question Paper 2024
Code-wise NEET 2024 Physics question paper with solutions is provided below for your reference.
| Question Paper Code | Language | NEET 2024 Physics Question Paper with Solutions PDF |
|---|---|---|
| Q1 | English | Click Here |
| Q2 | English | Click Here |
| Q3 | English | Click Here |
| Q4 | English | Click Here |
| Q5 | English | Click Here |
| Q6 | English | Click Here |
| R1 | English | Click Here |
| R2 | English | Click Here |
| R3 | English | Click Here |
| R4 | English | Click Here |
| R5 | English | Click Here |
| R6 | English | Click Here |
| S1 | English | Click Here |
| S2 | English | Click Here |
| S3 | English | Click Here |
| S4 | English | Click Here |
| T3 | English | Click Here |
| T4 | English | Click Here |
NEET Physics Question Paper 2023
The Code-wise NEET Physics Question Paper 2023 with solutions pdf is provided here.
| Question Paper Code | Language | NEET 2023 Physics Question Paper with Solutions PDF |
|---|---|---|
| E1 | English | Check Here |
| E2 | English | Check Here |
| E3 | English | Check Here |
| E4 | English | Check Here |
| E5 | English | Check Here |
| E6 | English | Check Here |
| F1 | English | Check Here |
| F2 | English | Check Here |
| F3 | English | Check Here |
| F4 | English | Check Here |
| F5 | English | Check Here |
| F6 | English | Check Here |
| G1 | English | Check Here |
| G2 | English | Check Here |
| G3 | English | Check Here |
| G4 | English | Check Here |
| G5 | English | Check Here |
| G6 | English | Check Here |
| H1 | English | Check Here |
| H2 | English | Check Here |
| H3 | English | Check Here |
| H4 | English | Check Here |
| H5 | English | Check Here |
| H6 | English | Check Here |
NEET Physics Question Paper 2022
The Code-wise NEET Physics Question Paper 2022 with solutions pdf are provided below. NTA conducted NEET 2022 on July 17, 2022, in offline PBT mode.
| Question Paper Code | Language | NEET 2022 Physics Question Paper with Solutions PDF |
|---|---|---|
| Q1 | English | Check Here |
| Q2 | English | Check Here |
| Q3 | English | Check Here |
| Q4 | English | Check Here |
| Q5 | English | Check Here |
| Q6 | English | Check Here |
| R1 | English | Check Here |
| R2 | English | Check Here |
| R3 | English | Check Here |
| R4 | English | Check Here |
| R5 | English | Check Here |
| R6 | English | Check Here |
| S1 | English | Check Here |
| S2 | English | Check Here |
| S3 | English | Check Here |
| S4 | English | Check Here |
| S5 | English | Check Here |
| S6 | English | Check Here |
| T1 | English | Check Here |
| T2 | English | Check Here |
| T3 | English | Check Here |
| T4 | English | Check Here |
| T5 | English | Check Here |
| T6 | English | Check Here |
To download NEET 2022 Physics Question Papers in other languages, click here
Frequently Asked Questions:
Is thermodynamics important for the NEET UG exam 2025?
Thermodynamics is an important topic for the NEET UG exam 2025 . It consists mainly of Laws of Thermodynamics and Carnot Cycle. The difficulty level of Thermodynamics is rated as moderately difficult in NEET exam :
In NEET , thermodynamics has about 8% weightage of the total marks, which is about 4–5 questions from the topics of the first law, entropy, enthalpy, and Gibbs free energy.
Which is the hardest topic in the NEET UG exam?
According to trends, the Physics section of NEET UG is said to be the most challenging among other sections, the Maths sections will be of moderate difficulty level and the Chemistry sections will be easy-moderate.
| Subject | Topic | Difficulty Level (Subjective) | Reported Difficulty (% of Candidates |
| Physics | Rotational Motion | High | 65 % |
| Physics | Electromagnetics | High High | 60 % |
| Chemistry | Organic Mechanisms | High | 70 % |
| Chemistry | Physical Chemistry (Equilibrium/ Numericals) | High | 68 % |
| Mathematics | 3D Geometry | High | 55 % |
| Mathematics | Integration | High | 50 % |
Was NEET UG 2024 Easier Than 2023?
Here is a brief comparison of two years:
- NEET UG 2023: The exam was perceived as moderately challenging, with Chemistry being notably tough, while Biology was relatively easier but lengthy.
- NEET UG 2024: Students and experts rated the exam as moderate in difficulty. Physics was considered the most challenging section, whereas Biology remained the easiest.
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