CBSE Class 12 Chemistry Chapter 1 Solutions: - Notes, Mind map And Extra Q&A

CBSE Class 12 Chemistry Chapter 1 Solutions: - Notes, Mind map And Extra Q&A
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Are you struggling with understanding the concepts of Solutions in CBSE Class 12 Chemistry? Look no further! In this article, we provide you with comprehensive notes, a mind map, and extra Q&A to help you ace your exams. Chemistry can be an intimidating subject, but with the right resources and guidance, you can easily grasp the concepts of Solutions. Our notes cover all the important topics in Chapter 1 of CBSE Class 12 Chemistry, providing you with a solid foundation for further learning.

To make studying even easier, we have included a mind map that visually organizes the key points of the chapter. This will help you to connect the dots and understand the relationships between different concepts. In addition to this, we have prepared a set of extra Q&A to test your knowledge and help you practice problem-solving. Our carefully selected questions will challenge you and ensure that you are well-prepared for your exams. Don't let Solutions be a stumbling block in your academic journey. Take advantage of our comprehensive resources to excel in CBSE Class 12 Chemistry.

In the fascinating world of Class 12 Chemistry, Chapter 1 opens the doors to a deep understanding of solutions, an essential concept for students aiming for success. At WitKnowLearn, we offer comprehensive Class 12 Chemistry Chapter 1 notes, meticulously designed to enhance your grasp of the subject. Our notes on solutions for Class 12 are an invaluable resource for students seeking to excel in their exams.

The solutions class 12 notes simplify complex ideas, making them easy to understand and remember. These notes are not just limited to textual explanations; they also include innovative solutions class 12 mind maps that visually break down concepts, making them easier to digest. For those who enjoy testing their knowledge, our solutions class 12 MCQs are a perfect tool. They help you practice and prepare for your exams effectively. Additionally, we provide solutions class 12 extra questions that delve deeper into the subject, offering a broader understanding and helping you tackle various types of questions.

With WitKnowLearn, mastering the intricacies of solutions in Chemistry for Class 12 becomes an engaging and productive journey. Our solution notes for class 12th are tailored to ensure that every student finds learning enjoyable and informative.

Types of Solutions

In Class 12 Chemistry, learning about the types of solutions is essential. Solutions are mixtures where substances are uniformly distributed and can be categorized based on the state of their solute and solvent. Gaseous solutions have gas solutes in a gas solvent, like air. Liquid solutions, the most prevalent, contain a liquid solvent and solutes that can be gas, liquid, or solid, such as saltwater. Solid solutions involve solid solutes in a solid solvent, like alloys. Each type demonstrates unique properties and behaviors, critical for understanding various chemical reactions and processes.

Expressing Concentration of Solutions

The concentration of solutions in chemistry is crucial, indicating the amount of solute in a given quantity of solvent or solution. Various methods to express concentration include molarity, molality, normality, and percent composition. Molarity is defined as moles of solute per liter of solution, and molality as moles of solute per kilogram of solvent. Normality involves equivalent weights, and percent composition refers to mass or volume percent. These concepts are vital for solution preparation and studying chemical reactions.


Solubility is a key concept in Class 12 chemistry. It is the maximum amount of solute that can dissolve in a solvent at a specific temperature and pressure. Factors like temperature, pressure, and the nature of the solute and solvent affect solubility. For instance, the solubility of gases in liquids usually decreases with increasing temperature and increases under higher pressure. This concept is fundamental in understanding reaction mechanisms and in solution preparation.

Vapour Pressure of Liquid Solutions

The vapour pressure of liquid solutions is vital in Class 12 chemistry, particularly in solutions and thermodynamics studies. It is the pressure exerted by the vapor in equilibrium with its liquid at a certain temperature. Raoult's law is key here, stating that the vapour pressure of a solution is proportional to the mole fraction of the solvent. This topic also explores deviations from Raoult's law, leading to ideal and non-ideal solutions.

Ideal and Non-ideal Solutions

Ideal and non-ideal solutions are crucial topics in Class 12 chemistry. Ideal solutions follow Raoult's law at all temperatures and compositions, with no enthalpy or volume change upon mixing. Non-ideal solutions deviate from Raoult's law and exhibit changes in enthalpy and volume. Understanding these solutions is important for predicting their behaviors and properties.

Colligative Properties and Determination of Molar Mass

Colligative properties depend on the number of solute particles, not their nature. These properties include relative lowering of vapor pressure, boiling point elevation, freezing point depression, and osmotic pressure. They are used in Class 12 chemistry to determine the molar mass of solutes, which is important in understanding solution behavior and practical applications like molecular weight determination.

Abnormal Molar Masses

Abnormal molar masses occur in some solutions, especially those with non-volatile solutes like electrolytes, where the observed molar masses differ from expected values. This is due to factors like solute molecules' dissociation and association in the solution. The Van't Hoff factor (i) is used to explain this deviation. Understanding abnormal molar masses is crucial for accurately determining molar masses in different scenarios.

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