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In the JEE Main Chemistry section, the topic Solution & Colligative Properties has an average weightage of 2-3%, with 1-2 questions being asked every year.
Important topics are Raoult's Law, Relative Lowering of Vapour Pressure, Van't Hoff Factor, Boiling Point Elevation, Freezing Point Depression, and Osmotic Pressure.According to the last 5 years,there were mostly conceptual questions asked from this chapter, which usually included formula-based calculations.
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Below are previous year questions with solutions of Solution & Colligative Properties
Question.1
Question.2
Question.3
- 55
- 45
- 40
- 32
Question.4
Question.5
Question.6
Question.7
Question.8
Question.9
- 180 g of benzoic acid dissolved in benzene
- 180 g of acetic acid dissolved in benzene
- 180 g of acetic acid dissolved in water
- 180 g of glucose dissolved in water
Question.10
JEE Main Chemistry Paper Pattern
The JEE Main Chemistry section consists of 25 Questions, which is divided into two sections:
- Section A (MCQs)
- Section B (Numerical Value Questions)
The total marks allocated for Chemistry is 100.
| Section | Question Type | No. of Questions | Attempt Required | Marking Scheme | Maximum Marks |
|---|---|---|---|---|---|
| A | Multiple Choice (MCQs) | 20 | All Compulsory | (+4) for Correct, -1 for Incorrect | 80 |
| B | Numerical Value Questions | 5 | 5 | (+4) for Correct, No Negative Marking | 20 |
| Total | 25 | 25 | 100 |
JEE Main Chemistry Chapter - Wise Weightage
JEE Main Chemistry is divided into Physical, Organic, and Inorganic Chemistry, and each accounts for around 33% of the paper.
The following is a chapter-wise weightage according to the previous year trends:
| Unit | Chapter | Weightage (% Approx.) | Average No. of Questions |
|---|---|---|---|
| Physical Chemistry | Some Basic Concepts of Chemistry | 2-3% | 1 |
| Atomic Structure | 2-3% | 1 | |
| Chemical & Ionic Equilibrium | 6-8% | 2-3 | |
| Thermodynamics | 6-7% | 2 | |
| Electrochemistry | 4-6% | 1-2 | |
| Chemical Kinetics | 3-4% | 1 | |
| Organic Chemistry | General Organic Chemistry (GOC) | 6-7% | 2 |
| Hydrocarbons | 4-5% | 1-2 | |
| Alcohols, Phenols & Ethers | 4-5% | 1-2 | |
| Carbonyl Compounds | 6-7% | 2 | |
| Biomolecules & Polymers | 3-4% | 1 | |
| Inorganic Chemistry | Periodic Table & Periodicity | 3-4% | 1 |
| Chemical Bonding | 6-7% | 2 | |
| Coordination Compounds | 4-5% | 1-2 | |
| p-Block Elements | 6-7% | 2 | |
| d- and f-Block Elements | 4-5% | 1-2 |
JEE Main Last 5 Year Chemistry Papers Pdf
Below are the last 5 year Question Paper along with their solutions candidates can check the same for their reference.
JEE Main 2024 Chemistry Question Paper
JEE Main 2024 Chemistry Question Paper Session 1
| Exam Date | Question Paper | Solution PDF |
|---|---|---|
| JEE Main 2024 Feb 1 Shift 2 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 Feb 1 Shift 1 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 Jan 31 Shift 2 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 Jan 31 Shift 1 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 Jan 30 Shift 2 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 Jan 30 Shift 1 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 Jan 29 Shift 2 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 Jan 29 Shift 1 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 Jan 27 Shift 2 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 Jan 27 Shift 1 Chemistry Question Paper | Download | Check Solution |
JEE Main 2024 Chemistry Question Paper Session 2
| Exam Date and Shift | Question Paper | Solution PDF |
|---|---|---|
| JEE Main 2024 April 4 Shift 1 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 April 4 Shift 2 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 April 5 Shift 1 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 April 5 Shift 2 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 April 6 Shift 1 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 April 6 Shift 2 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 April 8 Shift 1 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 April 8 Shift 2 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 April 9 Shift 1 Chemistry Question Paper | Download | Check Solution |
| JEE Main 2024 April 9 Shift 2 Chemistry Question Paper | Download | Check Solution |
JEE Main 2023 Chemistry Question Paper
JEE Main 2023 Chemistry Question Paper Session 2
| Exam Date | Chemistry Question Paper 2023 |
|---|---|
| Chemistry 6 April Shift 1 Question Paper | Check Here |
| Chemistry 6 April Shift 2 Question Paper | Check Here |
| Chemistry 8 April Shift 1 Question Paper | Check Here |
| Chemistry 8 April Shift 2 Question Paper | Check Here |
| Chemistry 10 April Shift 1 Question Paper | Check Here |
| Chemistry 10 April Shift 2 Question Paper | Check Here |
| Chemistry 11 April Shift 1 Question Paper | Check Here |
| Chemistry 11 April Shift 2 Question Paper | Check Here |
| Chemistry 12 April Shift 1 Question Paper | Check Here |
| Chemistry 13 April Shift 1 Question Paper | Check Here |
| Chemistry 13 April Shift 2 Question Paper | Check Here |
| Chemistry 15 April Shift 1 Question Paper | Check Here |
JEE Main 2023 Chemistry Question Paper Session 1
| Exam Date and Shift | Chemistry Question Paper 2023 |
|---|---|
| Chemistry 24 January Shift 1 Question Paper | Check Here |
| 2023 Chemistry 24 January Shift 2 Question Paper | Check Here |
| Chemistry 25 January Shift 1 Question Paper | Check Here |
| Chemistry 25 January Shift 2 Question Paper | Check Here |
| Chemistry 29 January Shift 1 Question Paper | Check Here |
| Chemistry 29 January Shift 2 Question Paper | Check Here |
| Chemistry 30 January Shift 1 Question Paper | Check Here |
| Chemistry 30 January Shift 2 Question Paper | Check Here |
| Chemistry 31 January Shift 1 Question Paper | Check Here |
| Chemistry 31 January Shift 2 Question Paper | Check Here |
| Chemistry 1 February Shift 1 Question Paper | Check Here |
| Chemistry 1 February Shift 2 Question Paper | Check Here |
JEE Main 2022 Chemistry Question Paper
JEE Main 2022 Chemistry Question Paper with Solution Phase 2
| Exam Date | Shift/ Slot | Question Paper PDF |
|---|---|---|
| July 25 | Shift 1 | Check Here |
| July 25 | Shift 2 | Check Here |
| July 26 | Shift 1 | Check Here |
| July 26 | Shift 2 | Check Here |
| July 27 | Shift 1 | Check Here |
| July 27 | Shift 2 | Check Here |
| July 28 | Shift 1 | Check Here |
| July 28 | Shift 2 | Check Here |
| July 29 | Shift 1 | Check Here |
| July 29 | Shift 2 | Check Here |
JEE Main 2022 Chemistry Question Paper with Solution PDF- Phase 1
| Exam Date | Shift/ Slot | Question Paper PDF |
|---|---|---|
| June 29 | Shift 1 | Check Here |
| June 29 | Shift 2 | Check Here |
| June 28 | Shift 1 | Check Here |
| June 28 | Shift 2 | Check Here |
| June 27 | Shift 1 | Check Here |
| June 27 | Shift 2 | Check Here |
| June 26 | Shift 1 | Check Here |
| June 26 | Shift 2 | Check Here |
| June 25 | Shift 1 | Check Here |
| June 25 | Shift 2 | Check Here |
| June 24 | Shift 1 | Check Here |
| June 24 | Shift 2 | Check Here |
JEE Main 2021 Chemistry Question Paper
JEE Main 2021 Chemistry Question Paper with Solution (Session 4- August)- Download PDF
| Exam Date | Shift/ Slot | Question Paper PDF |
|---|---|---|
| August 26 | Shift 1 | Check Here |
| August 26 | Shift 2 | Check Here |
| August 27 | Shift 1 | Check Here |
| August 27 | Shift 2 | Check Here |
| August 31 | Shift 1 | Check Here |
| August 31 | Shift 2 | Check Here |
| September 1 | Shift 2 | Check Here |
JEE Main 2021 Chemistry Question Paper with Solution (Session 3- July)- Download PDF
| Exam Date | Shift/ Slot | Question Paper PDF |
|---|---|---|
| July 22 | Shift 2 | Check Here |
| July 25 | Shift 1 | Check Here |
| July 25 | Shift 2 | Check Here |
| July 27 | Shift 1 | Check Here |
| August 3 | Shift 1 | Check Here |
| August 3 | Shift 2 | Check Here |
| August 4 | Shift 1 | Check Here |
| August 4 | Shift 2 | Check Here |
JEE Main 2021 Chemistry Question Paper with Solution (Session 2- March)- Download PDF
| Exam Date | Shift/ Slot | Question Paper PDF |
|---|---|---|
| March 16 | Shift 1 | Check Here |
| March 16 | Shift 2 | Check Here |
| March 17 | Shift 1 | Check Here |
| March 17 | Shift 2 | Check Here |
| March 18 | Shift 1 | Check Here |
| March 18 | Shift 2 | Check Here |
JEE Main 2021 Chemistry Question Paper with Solution (Session 1- February)- Download PDF
| Exam Date | Shift/ Slot | Question Paper PDF |
|---|---|---|
| February 24 | Shift 1 | Check Here |
| February 24 | Shift 2 | Check Here |
| February 25 | Shift 1 | Check Here |
| February 25 | Shift 2 | Check Here |
| February 26 | Shift 1 | Check Here |
| February 26 | Shift 2 | Check Here |
JEE Main 2020 Chemistry Question Paper
JEE Main 2020 Chemistry Question Paper with Solutions (Session 2- September)- Download PDF
| Exam Date | Shift/ Slot | JEE Main Question Paper PDF |
|---|---|---|
| September 2 | Shift 1 | Check Here |
| September 2 | Shift 2 | Check Here |
| September 3 | Shift 1 | Check Here |
| September 3 | Shift 2 | Check Here |
| September 4 | Shift 1 | Check Here |
| September 4 | Shift 2 | Check Here |
| September 5 | Shift 1 | Check Here |
| September 5 | Shift 2 | Check Here |
| September 6 | Shift 1 | Check Here |
| September 6 | Shift 2 | Check Here |
JEE Main 2020 Chemistry Question Paper with Solutions (Session 1- January)- Download PDF
| Exam Date | Shift/ Slot | JEE Main Question Paper PDF |
|---|---|---|
| January 8 | Shift 1 | Check Here |
| January 8 | Shift 2 | Check Here |
| January 9 | Shift 1 | Check Here |
| January 9 | Shift 2 | Check Here |
Important Topics Related to Solution & Colligative Properties:
NCERT Class 11 Chemistry Books
Frequently Asked Questions
What are the colligative properties of solutions Class 12?
Colligative properties are solution properties that only depend on the number of solute particles (ionic or molecular) in the quantity of a solvent and not on the identity.
They occur because adding a non-volatile solute dilutes the solvent.
| Property | Effect on Solution | Common Applications |
| Lowering of Vapour Pressure | minimizes the evaporation of solvents | Perfume, distillation processes |
| Boiling Point Elevation | raises the boiling point | Antifreeze, cooking with salt |
| Freezing Point Depression | reduces the freezing point | Road salting, food preservation |
| Osmotic Pressure | propels the flow of solvents | IV fluids, plant water absorption |
What is solution in chemistry pdf?
A chemical solution is a homogeneous mixture of two or more substances, with the solute spread equally within the solvent. The solute dissolves in the solvent to create a single-phase system.
Major Features of a Solution:
- Homogeneous: Composition is the same everywhere.
- Stable: Solute particles do not accumulate over time.
- Cannot be Removed with Filtration: Must go through evaporation or other processes.
- Particle Size: Less than 1 nm (nanometer).
What are the 4 types of colligative properties?
Colligative properties are solution properties that only depend upon the number of particles of the solute, but not upon their type.
The 4 most important colligative properties are:
- Relative Lowering of Vapour Pressure – Addition of a non-volatile solute lowers the vapour pressure of the solvent.
- Boiling Point Elevation – A solution boils at a temperature greater than pure solvent.
- Freezing Point Depression – Freezing point decreases at a temperature less than that of the pure solvent.
- Osmotic Pressure – Pressure needed to prevent solvent movement across a semipermeable membrane.
How is osmotic pressure over other colligative properties?
Osmotic pressure is the most precise and dependable colligative property because:
- It can be precisely measured even at extremely dilute solute concentrations.
- Unlike freezing point depression and boiling point elevation, it does not involve heating or cooling and thus is simpler to observe.
- It is of paramount importance in biological as well as industrial applications such as cell fluid balance and water treatment.
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