Q 2.37 Vapour pressures of pure acetone and chloroform at 328 K are 741.8 mm Hg and 632.8 mm Hg respectively. Assuming that they form ideal solution over the entire range of composition, plot ptotal, pchloroform, and pacetone as a function of xacetone. The experimental data observed for different compositions of mixture is: Plot this data also on the same graph paper. Indicate whether it has positive deviation or negative deviation from the ideal solution.

100 xacetone	0	3.4.8	23.4	36.0	50.8	58.2	64.5	72.1
pacetone /mm Hg	0	54.9	110.1	202.4	322.7	405.9	454.1	521.1
pchloroform /mm Hg	632.8	548.1	469.4	359.7	257.7	193.6	161.2	120.7

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 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 
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