Two beakers of capacity 500 mL were taken. One of these beakers, labelled as “A”, was filled with 400 mL water whereas the beaker labelled “B” was filled with 400 mL of 2 M solution of NaCl. At the same temperature both the beakers were placed in closed containers of same material and same capacity as shown in Fig.2.2. At a given temperature, which of the following statement is correct about the vapour pressure of pure water and that of NaCl solution.
(i) Vapour pressure in container (A) is more than that in container (B).
(ii) Vapour pressure in container (A) is less than that in container (B).
(iii) Vapour pressure is equal in both the containers.
(iv) Vapour pressure in container (B) is twice the vapour pressure in container (A).
This is a multiple choice answer as classified in NCERT Exemplar
(i) Vapour pressure in container (A) is more than that in container (B).
Explanation: Due to the fleeing inclinations of water molecules from the liquid's surface, the vapour pressure rises. The vapour pressure increases as the number of molecules on the liquid's surface increases. Because only water molecules are present at the surface of beaker A, it has a higher vapour pressure. However, a fraction of the surface area of the solution in beaker B containing NaCl solution is occupied by NaCl molecules, which are non-volatile and have no tendency to escape. As a resul
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This is a multiple choice answer as classified in NCERT Exemplar
(i) Vapour pressure in container (A) is more than that in container (B).
Explanation: Due to the fleeing inclinations of water molecules from the liquid's surface, the vapour pressure rises. The vapour pressure increases as the number of molecules on the liquid's surface increases. Because only water molecules are present at the surface of beaker A, it has a higher vapour pressure. However, a fraction of the surface area of the solution in beaker B containing NaCl solution is occupied by NaCl molecules, which are non-volatile and have no tendency to escape. As a result, the quantity of water molecules present in NaCl solution decreases, lowering its vapour pressure.
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<p><span data-teams="true">This is a multiple choice answer as classified in NCERT Exemplar</span></p><p>(i) Vapour pressure in container (A) is more than that in container (B).</p><p>Explanation: Due to the fleeing inclinations of water molecules from the liquid's surface, the vapour pressure rises. The vapour pressure increases as the number of molecules on the liquid's surface increases. Because only water molecules are present at the surface of beaker A, it has a higher vapour pressure. However, a fraction of the surface area of the solution in beaker B containing NaCl solution is occupied by NaCl molecules, which are non-volatile and have no tendency to escape. As a result, the quantity of water molecules present in NaCl solution decreases, lowering its vapour pressure.</p>
After the 2023-24 revised CBSE syllabus, many chapters have been removed, and in some chapters syllabus is reduced. As per the latest CBSE exam pattern 2025-26, the Chapter 1 Solutions will be asked for 5-7 marks in the Class 12 Chemistry CBSE board exams.
For other competitive exams, the Solutions chapter has a medium weightage in the NEET exam. In the NEET exam, 1-2 questions are frequently asked based on the concept of moderate-level numerical.
Physical Chemistry holds over 30% weightage in the chemistry section in the JEE Mains exam. The solutions chapter is considered a part of physical chemistry. You can expect 1 question fo
...more
After the 2023-24 revised CBSE syllabus, many chapters have been removed, and in some chapters syllabus is reduced. As per the latest CBSE exam pattern 2025-26, the Chapter 1 Solutions will be asked for 5-7 marks in the Class 12 Chemistry CBSE board exams.
For other competitive exams, the Solutions chapter has a medium weightage in the NEET exam. In the NEET exam, 1-2 questions are frequently asked based on the concept of moderate-level numerical.
Physical Chemistry holds over 30% weightage in the chemistry section in the JEE Mains exam. The solutions chapter is considered a part of physical chemistry. You can expect 1 question form the solutions chapter in JEE Mains exam.
NCERT offers the foundation for every class 12 student. CBSE board exam questions are primarily based on the NCERT exercise, Examples and conceptual explanation.
There are various benefits of using NCERT Solutions.
Specially for CBSE Board students, these NCERT Solutions are the best resource to prepare for the boards.
These NCERT Solutions include step-wise descriptive answer approach that will help you write good answers.
These solutions also help you understand problem-solving and how to approach a specific type of conceptual or numerical problem.
If you are preparing for the JEE or NEEt exam, these solutions can be your first deci
...more
NCERT offers the foundation for every class 12 student. CBSE board exam questions are primarily based on the NCERT exercise, Examples and conceptual explanation.
There are various benefits of using NCERT Solutions.
Specially for CBSE Board students, these NCERT Solutions are the best resource to prepare for the boards.
These NCERT Solutions include step-wise descriptive answer approach that will help you write good answers.
These solutions also help you understand problem-solving and how to approach a specific type of conceptual or numerical problem.
If you are preparing for the JEE or NEEt exam, these solutions can be your first decisive step towards success.
For NEET and JEE aspirants, NCERT solutions are the first foundation block that offer understanding of fundamental concepts, their application
Shiksha focuses on completely fulfilling the needs of CBSE class 12 board students. We provide NCERT Solutions for classes 11th and 12th in class for physics, chemistry and mathematics.
Here are the key reasons why you should use Shiksha's NCERT Solutions for the Solution Chapter:
Complete coverage of NCERT Exercise, including MCQs, very short, short and long answer type questions.
Step-by-step solutions according to the CBSE board exam needs.
Intext question and answer with a free downloadable PDF
complete study material for the chapter
NCERT Chapter 1 Solutions Notes
Solutions Quick Revision Notes
Important Questions for Solution
...more
Shiksha focuses on completely fulfilling the needs of CBSE class 12 board students. We provide NCERT Solutions for classes 11th and 12th in class for physics, chemistry and mathematics.
Here are the key reasons why you should use Shiksha's NCERT Solutions for the Solution Chapter:
Complete coverage of NCERT Exercise, including MCQs, very short, short and long answer type questions.
Step-by-step solutions according to the CBSE board exam needs.
Intext question and answer with a free downloadable PDF
If a solution containing more than 0.9% salt is used, and we place blood cells in it, the water will flow out of the cells, and they will shrink. Such a solution is a hypertonic solution.
Similarly, if a solution contains less than 0.9% salt, the water will flow into the cells, and they will enlarge.
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