Solution & Colligative Properties- NEET Previous Year Questions with Solutions and Weightage

In the NEET Chemistry section, the topic Solution & Colligative Properties has an average weightage of 4% , with 2-3 questions being asked every year.

According to the last 5 years ,there were mostly conceptual questions asked from this chapter, which usually included formula-based calculations.

The homogeneous mixture of two or more substances that are nonreactive in nature are called solutions. The composition of these substances can be in different quantities or in different physical states. However, a binary solution consists of two substances only.

• A solution consists of solute and solvent. The substance that is present in a small quantity is called solute while the constituent that is present in a large quantity is called the solvent.
• Solution is an important topic in NEET Chemistry Syllabus, the study notes will help you in understanding the different types of solutions, colligative properties, and how to determine the molecular mass using these properties.
• The sample questions provided in the article will also help you to practice questions to prepare for NEET 2022.

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NEET Study Notes for Solutions: Important Topics

The Solutions and Colligative Properties questions with detailed solutions asked in NEET exam are listed below:

Question 1:

Pumice stone is an example of -

• gel
• solid sol
• foam
• sol

View Solution

Question 2:

• 55 g
• 15 g
• 30 g
• 45 g

View Solution

Question 3 :

• P2>P1>P3
• P1>P2>P3
• P2>P3>P1
• P3>P1>P2

View Solution

Question 4:

If 8 g of a non-electrolyte solute is dissolved in 114 g of n-octane to reduce its vapour pressure to 80%, the molar mass (in g mol-1) of the solute is

[Given that the molar mass of n-octane is 114 g mol-1.]

• 40
• 60
• 80
• 20

View Solution

Question 5:

Of the following 0.10 m aqueous solutions, which one will exhibit the largest freezing point depression?

• C6H12O6
• Al2(SO4)3
• K2SO4
• KCl

View Solution

Question 6:

The Van't Hoff factor I for a compound which undergoes dissociation in one solvent and association in other solvent is respectively :

• greater than one and greater than one
• less than one and greater than one
• less than one and less than one
• greater than one and less than one

View Solution

Question 7:

The beans are cooked earlier in pressure cooker, because

• B.P. increase with increasing pressure
• B.P. decrease with increasing pressure
• extra pressure of pressure cooker, softens the beans
• internal energy is not lost while cooking in pressure cooker

View Solution

Question 8:

The normal boiling point of water is 373 K(at 760 mm). Vapour pressure of water at 298 K is 23 mm. If enthalpy of vaporisation is 40.656 kJ the boiling point of water at 23 mm atmospheric pressure will be

• 250 K
• 298 K
• 51.6 K
• 12.5 K

View Solution

NEET Chemistry Exam Pattern 2024: Marking Scheme

Candidates will get 4 marks for every correct answer. 1 mark will be deducted for every incorrect answer. No mark will be rewarded for unattempted questions. Candidates are advised not to fill in more than one option in the OMR sheet. If they do so then that question will be considered incorrect and you will get negative marks.

Important Topics for NEET Chemistry

NEET chemistry syllabus can be divided into 3 parts i.e Organic, Inorganic, and Physical Chemistry. The weightage of questions asked from each section is almost the same every year.

• NEET Physical Chemistry: It’s the numerical section of NEET Chemistry.
• NEET Organic Chemistry: From this section, you must focus on memorizing the names of various compounds that constitute reagents, subtracts, etc.
• NEET Inorganic Chemistry: This section is considered the easiest section of NEET Chemistry.

NEET Chemistry Exam Pattern 2024: Chapter wise weightage

Based on the questions asked in previous years we have tabulated the weightage of sections or topics given to class XII and XII:

NEET 2024 Question Paper PDF Code R

NEET 2024 Question Paper PDF Code Q

NEET 2024 Question Paper PDF Code T

NEET 2024 Question Paper PDF Code S

NEET Re-Exam June 23 Question Paper

NEET Subject Wise Question Paper 2024 PDF with Answer Key and Solution

NEET Sample Paper 2024 PDF Download with Answer

Students must not confuse this sample paper with the actual question paper. This is just a mock paper with answers that will help you with your exam preparation.

NEET 2025: Previous Year Question Papers

Given below are the year-wise question paper for NEET examination:

Frequently Asked Questions:

Q1. 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.

Q2. 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).

Q3. 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.

Q4. 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.

Q5. What are the colligative properties and how are they important for the NEET exam?

Colligative properties are the properties that help us to understand how a solutions’ properties are linked to a solute’s concentration in any solution. These properties are only dependent on the number of non-volatile solute particles and not on their type. Colligative properties are widely observed in dilute solutions.

We can also consider colligative properties as the properties observed by the dissolving of a non-volatile solute in an unstable solvent. Normally, the solvent properties are changed by the solute where its particles eliminate a portion of the solvent atoms in the fluid stage. This likewise brings about the decrease of the grouping of the solvent.

Colligative properties can be linked with multiple quantities which are useful in expressing the concentration of a solution, such as molarity, normality, and molality. The various types of colligative properties are:

• Freezing point depression
• Boiling point elevation
• Osmotic pressure

The word ‘colligative’ is derived from the Latin word Colligatus. Colligatus translates to ‘bound together.’ In the situation of defining a solution, Colligative properties help us understand how the properties of the solution are associated with the concentration of solute in the solution.

Things to Remember:

• Colligative properties refer to those properties which are entirely dependent on the ratio of the number of solute particles to the total number of solvent particles.
• The various types of colligative properties of different solutions are:

1. Freezing point depression: ΔTf =1000 x kf x m2 /(M2 x m1)
2. Boiling point elevation: ΔTb = kb m
3. Osmotic pressure: π = (n2/V) RT
4. Relative lowering of vapor pressure: (Po - Ps)/Po

• Van’t Hoff Factor, i = observed colligative property/calculated colligative property.
• Read more about different types of solutions here.