Chemistry · JEE

Solutions Concepts for JEE

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Quick answer

Master Solutions by understanding definitions, standard results, and typical JEE question patterns — then practise with syllabus-aligned MCQs on Goodmarks.

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Concept explainer

Concept overview for Solutions covering 4 JEE syllabus subtopics including Different methods for expressing the concentration of solution: molality, molarity, mole fraction, percentage (by volume and mass both), The vapour pressure of solutions and Raoult's Law - Ideal and non-ideal solutions, vapour pressure composition, plots for ideal and non-ideal solutions, Colligative properties of dilute solutions: a relative lowering of vapour pressure, depression of freezing point, the elevation of boiling point and osmotic pressure.

Key points

Understand the definition and scope of Different methods for expressing the concentration of solution: molality, molarity, mole fraction, percentage (by volume and mass both) in the JEE syllabus
Memorise key formulas and standard results linked to Different methods for expressing the concentration of solution: molality, molarity, mole fraction, percentage (by volume and mass both)
Practise 20–40 syllabus-aligned MCQs with step-by-step solutions
Understand the definition and scope of The vapour pressure of solutions and Raoult's Law - Ideal and non-ideal solutions, vapour pressure composition, plots for ideal and non-ideal solutions in the JEE syllabus
Memorise key formulas and standard results linked to The vapour pressure of solutions and Raoult's Law - Ideal and non-ideal solutions, vapour pressure composition, plots for ideal and non-ideal solutions
Practise 20–40 syllabus-aligned MCQs with step-by-step solutions

JEE tips

Revise Different methods for expressing the concentration of solution: molality, molarity, mole fraction, percentage (by volume and mass both) with a one-page formula sheet before attempting mixed tests
After each practice set, log mistakes specific to Different methods for expressing the concentration of solution: molality, molarity, mole fraction, percentage (by volume and mass both) and reattempt after 48 hours
Revise The vapour pressure of solutions and Raoult's Law - Ideal and non-ideal solutions, vapour pressure composition, plots for ideal and non-ideal solutions with a one-page formula sheet before attempting mixed tests
After each practice set, log mistakes specific to The vapour pressure of solutions and Raoult's Law - Ideal and non-ideal solutions, vapour pressure composition, plots for ideal and non-ideal solutions and reattempt after 48 hours

Common trap

Students often rush Different methods for expressing the concentration of solution: molality, molarity, mole fraction, percentage (by volume and mass both) questions without checking units, sign conventions, or boundary conditions — always verify assumptions before calculating.

JEE Formula Sheet

6+ important formulas for Solutions

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Subtopics in Solutions

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Free sample questions

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Q1ChemistryUnit 5: Solutions

Pick out the correct statements This question has multiple correct options

Q2ChemistryUnit 5: Solutions

The vapour prerssure of pure liquids

A

and B are 400 and

600 m m H g

respectively at

298 K .

On mixing the two liquids, the sum of their initial volumes is equal to the volume of the final mixture. The mole fraction of liquids B is 0.5 in the mixture. The vapour pressure of the final solution,the mole fraction of components

A

and

B

in vapour phase, respectively are:

Q3ChemistryUnit 5: Solutions

The observed osmotic pressure for a

0.10 M

solution of

F e\left(N H_{4}\right)_{2}\left(S O_{4}\right)_{2}

25^{\circ} C

is 10.8 atm. The expected and experimental (observed) values of Van't Hoff factor (i) will be respectively:

\left(\boldsymbol{R}=\mathbf{0 . 0 8 2} \quad \boldsymbol{L} \quad \boldsymbol{a t m} \quad \boldsymbol{k}^{-} \boldsymbol{m o l}^{-1}\right)

Q4ChemistryUnit 5: Solutions

The incorrect statement is :

Q5ChemistryUnit 5: Solutions

Which type of phenomenon is used when coloured dye is removed from solution of sugar by charcoal?

Q6ChemistryUnit 5: Solutions

At constant temperature, the osmotic pressure of a solution is: This question has multiple correct options

Q7ChemistryUnit 5: Solutions

Hydrochloric acid solution

A

and

B

have a concentration of

0.5 N

and

0.1 N

respectively. The volume of solutions

\boldsymbol{A}

and

B

required to make 2 litres of

\mathbf{0 . 2} \mathbf{N} \mathbf{H} \mathbf{C l}

are:

Q8ChemistryUnit 5: Solutions

18 g glucose

\left(C_{6} H_{12} O_{6}\right)

is added to

178.2 \mathrm{g}

of water. The vapour pressure of this aqueous solution at

100^{0} C

in torr is:

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Frequently asked questions

What concepts in Solutions are essential for JEE?

Focus on core ideas across Different methods for expressing the concentration of solution: molality, molarity, mole fraction, percentage (by volume and mass both), The vapour pressure of solutions and Raoult's Law - Ideal and non-ideal solutions, vapour pressure composition, plots for ideal and non-ideal solutions, Colligative properties of dilute solutions: a relative lowering of vapour pressure, depression of freezing point, the elevation of boiling point and osmotic pressure, Determination of molecular mass using colligative properties, abnormal value of molar mass, van't Hoff factor and its significance. JEE tests application, not just memorisation.