Viraf J Dalal Chemistry Class 9 Textbook PDF Free Download
Chemistry is one of the most fascinating and important subjects in science. It deals with the composition, structure, properties and changes of matter. Chemistry helps us to understand the world around us and how it works. Chemistry also plays a vital role in many fields such as medicine, engineering, agriculture, environment, etc.
viraf j dalal chemistry class 9 textbook pdf free download
If you are a student of class 9 and want to learn chemistry in a simple and effective way, then you should consider using Viraf J Dalal Chemistry Class 9 Textbook. This book is written by Dr Viraf J Dalal, who is a renowned author and educator in the field of chemistry. He has written many books for ICSE and ISC students and has received many awards and recognitions for his contributions.
Introduction
In this article, we will tell you why Viraf J Dalal Chemistry Class 9 Textbook is a good choice for you and how you can download it for free in PDF format. We will also give you a brief summary of each chapter of the book and some frequently asked questions at the end. So, let's get started!
Why Viraf J Dalal Chemistry Class 9 Textbook?
There are many reasons why Viraf J Dalal Chemistry Class 9 Textbook is a preferred book for ICSE students. Some of them are:
It covers the entire syllabus of ICSE Class 9 Chemistry as prescribed by the Council for the Indian School Certificate Examinations (CISCE).
It explains the concepts in a clear and concise manner with suitable examples and diagrams.
It provides ample exercises and problems for practice and revision.
It includes practical work, projects, experiments and activities to enhance the learning experience.
It follows a logical and systematic approach to develop the analytical and problem-solving skills of the students.
How to Download Viraf J Dalal Chemistry Class 9 Textbook PDF?
If you want to download Viraf J Dalal Chemistry Class 9 Textbook PDF for free, then you can follow these simple steps:
Go to the website
Scroll down to find ICSE Books For Class 9 section.
Click on the link for Class 9 Chemistry (Dr Viraf J Dalal).
You will see a list of chapters with their respective download links.
Click on the download link for each chapter that you want to download.
You will get the PDF file of that chapter on your device.
You can save it or print it as per your convenience.
Chapter-wise Summary of Viraf J Dalal Chemistry Class 9 Textbook
Here is a brief summary of each chapter of Viraf J Dalal Chemistry Class 9 Textbook:
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Chapter 1: The Language of Chemistry
This chapter introduces the basic concepts and terms used in chemistry such as symbols, formulas, equations, laws of chemical combination, mole concept and stoichiometry.
Symbols, Formulas and Equations
Symbols are used to represent elements and compounds in chemistry. For example H is the symbol for hydrogen, O is the symbol for oxygen, and H2O is the formula for water. Formulas show the composition and ratio of elements in a compound. For example, H2O means that water contains two atoms of hydrogen and one atom of oxygen. Equations show the changes that occur during a chemical reaction. For example, H2 + O2 -> H2O means that hydrogen and oxygen react to form water.
Laws of Chemical Combination
Laws of chemical combination are the rules that govern how elements combine to form compounds. There are two main laws of chemical combination: law of conservation of mass and law of constant proportions. Law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction. Law of constant proportions states that a given compound always contains the same elements in the same fixed ratio by mass.
Mole Concept and Stoichiometry
Mole concept and stoichiometry are the methods of measuring and calculating the quantities of substances involved in a chemical reaction. A mole is a unit that represents 6.022 x 10^23 particles of a substance. It is also equal to the relative atomic mass or relative molecular mass of a substance in grams. Stoichiometry is the study of the relationships between the moles, masses, volumes and concentrations of reactants and products in a chemical reaction.
Chapter 2: Chemical Changes and Reactions
This chapter explains the different types of chemical changes and reactions such as combination, decomposition, displacement, double displacement, oxidation-reduction, exothermic, endothermic, reversible, irreversible, etc. It also discusses the factors that affect the rate of chemical reactions such as temperature, concentration, surface area, catalysts, etc.
Types of Chemical Reactions
Chemical reactions can be classified into different types based on the nature and number of reactants and products involved. Some common types of chemical reactions are:
Combination reaction: A reaction in which two or more substances combine to form a single product. For example, C + O2 -> CO2.
Decomposition reaction: A reaction in which a single compound breaks down into two or more simpler substances. For example, 2H2O -> 2H2 + O2.
Displacement reaction: A reaction in which an element displaces another element from its compound. For example, Zn + CuSO4 -> ZnSO4 + Cu.
Double displacement reaction: A reaction in which two compounds exchange their ions or radicals to form two new compounds. For example, NaCl + AgNO3 -> NaNO3 + AgCl.
Oxidation-reduction reaction: A reaction in which one substance loses electrons (oxidation) and another substance gains electrons (reduction). For example, 2Mg + O2 -> 2MgO.
Energy Changes in Chemical Reactions
Chemical reactions involve changes in energy as bonds are broken and formed between atoms. Energy can be either absorbed or released during a chemical reaction. A reaction that absorbs energy from the surroundings is called an endothermic reaction. For example, photosynthesis is an endothermic reaction as plants absorb light energy to make glucose. A reaction that releases energy to the surroundings is called an exothermic reaction. For example, combustion is an exothermic reaction as fuels burn to produce heat and light energy.
Rate of Chemical Reactions
The rate of a chemical reaction is the speed at which the reactants are converted into products. The rate of a chemical reaction depends on several factors such as:
Temperature: Increasing the temperature increases the kinetic energy and collisions of the particles, thus increasing the rate of reaction.
Concentration: Increasing the concentration increases the number of particles per unit volume, thus increasing the chances of collisions and the rate of reaction.
Surface area: Increasing the surface area increases the exposed area of the reactants, thus increasing the contact and collisions between them and the rate of reaction.
Catalyst: A catalyst is a substance that lowers the activation energy required for a reaction to occur, thus increasing the rate of reaction without being consumed or changed itself.
Chapter 3: Water
This chapter describes the physical and chemical properties of water such as boiling point, freezing point, density, solubility, etc. It also explains the chemical reactions involving water such as hydrolysis, hydration, neutralization, etc. It also discusses the hardness of water and its removal methods such as boiling, filtration, ion exchange, etc.
Physical Properties of WaterPhysical Properties of Water
Water is a unique and essential substance for life. It has some remarkable physical properties that make it different from other liquids. Some of these properties are:
Boiling point: Water has a high boiling point of 100C at normal atmospheric pressure. This means that water can exist as a liquid over a wide range of temperatures and provide a stable environment for living organisms.
Freezing point: Water has a low freezing point of 0C at normal atmospheric pressure. This means that water can remain liquid even at low temperatures and prevent the freezing of cells and tissues.
Density: Water has a maximum density of 1 g/mL at 4C. This means that water expands when it freezes and becomes less dense than liquid water. This causes ice to float on water and insulate the water below from freezing.
Solubility: Water is a universal solvent that can dissolve many substances such as salts, sugars, acids, bases, etc. This means that water can transport nutrients and wastes in living systems and regulate the pH and osmotic pressure of cells.
Chemical Properties of Water
Water is also a reactive substance that can undergo various chemical reactions such as hydrolysis, hydration, neutralization, etc. Some of these reactions are:
Hydrolysis: Water can split into hydrogen ions (H+) and hydroxide ions (OH-) in the presence of an electric current or certain catalysts. This process is called hydrolysis or electrolysis of water. For example, 2H2O -> 2H2 + O2.
Hydration: Water can attach to other molecules and form hydrates or hydrated compounds. For example, copper sulfate pentahydrate (CuSO4.5H2O) is a blue crystalline compound that contains five molecules of water per molecule of copper sulfate.
Neutralization: Water can react with acids and bases to form salts and water. This process is called neutralization or acid-base reaction. For example, HCl + NaOH -> NaCl + H2O.
Hardness of Water and Its Removal
Water hardness is the measure of the amount of calcium and magnesium salts dissolved in water. Hard water causes problems such as scaling, soap scum, corrosion, etc. Hard water can be classified into two types: temporary hardness and permanent hardness. Temporary hardness is caused by the presence of bicarbonates of calcium and magnesium in water. It can be removed by boiling the water or adding lime (CaO) to it. Permanent hardness is caused by the presence of chlorides and sulfates of calcium and magnesium in water. It can be removed by using filters, ion exchange resins, or reverse osmosis.
Conclusion
In this article, we have discussed why Viraf J Dalal Chemistry Class 9 Textbook is a good choice for ICSE students and how to download it for free in PDF format. We have also given a brief summary of each chapter of the book and some frequently asked questions at the end. We hope that this article has helped you to learn chemistry in a simple and effective way.
FAQs
Who is the author of Viraf J Dalal Chemistry Class 9 Textbook?
The author of Viraf J Dalal Chemistry Class 9 Textbook is Dr Viraf J Dalal, who is a renowned author and educator in the field of chemistry.
What is the syllabus of ICSE Class 9 Chemistry?
The syllabus of ICSE Class 9 Chemistry covers the topics such as the language of chemistry, chemical changes and reactions, water, atomic structure and chemical bonding, study of the first element - hydrogen, study of gas laws, atmospheric pollution, etc.
How many chapters are there in Viraf J Dalal Chemistry Class 9 Textbook?
There are 10 chapters in Viraf J Dalal Chemistry Class 9 Textbook.
How can I get the solutions for Viraf J Dalal Chemistry Class 9 Textbook?
You can get the solutions for Viraf J Dalal Chemistry Class 9 Textbook from the website
What are some other books that I can use for ICSE Class 9 Chemistry?
Some other books that you can use for ICSE Class 9 Chemistry are:
<li ICSE Class 9 Chemistry by Selina Publishers
ICSE Class 9 Chemistry by S Chand Publishers
ICSE Class 9 Chemistry by Oswaal Publishers
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