• Dimensional Analysis Chapter 1: Some Basic Concepts of Chemistry; Chapter 2: Structure of Atom For example, sodium, copper, silver, hydrogen, oxygen etc. • Element: An element contains particles of only one type which may be atoms or molecules. Subtraction of numbers can be done in the same way as the addition. I'm sure after learning these, you might become a fan of Chemistry. They completely occupy the container in which they are placed. Chapter 3. It includes all the topics given in NCERT class 11 Chemistry text book. By practicing this resources candidates definitely get the idea of which his/her weak areas and how to prepare well for the examination. For example, What do you understand by Some Basic Concepts of Chemistry? Chapter 2. colour, odour, melting point, boiling point, density etc.The measurement or observation of chemical properties requires a chemical change occur. For example, decomposition of mercuric oxide. Candidates who are ambitious to qualify the Class 11 with good score can check this article for Notes, Question & Practice Paper. 1. Volume: Volume means the space occupied by matter. Liquids: In liquids, the particles are close to each other but can move around. Significant figures are meaningful digits which are known with certainty. Candela: It may be defined as the luminous intensity in a given direction, from a source which emits monochromatic radiation of frequency 540 x 1012 Hz and that has a radiant intensity in that direction of 1/ 683 watt per steradian. One atomic mass unit (amu) is equal to l/12th of the mass of an atom of carbon-12 isotope. The mass of a substance is constant. (ii) Law of Definite Proportions Class 11 Chemistry Chapter 1 focuses on providing you with basic concepts of Chemistry explained in an elementary manner which is lucid and easy to comprehend. (D) Application in Industry: Where n is the common factor and also called multiplying factor. examples are: Common salt, marble, gypsum, washing soda etc. 3. Mole fraction For example, in 285 cm, there are three significant figures and in 0.25 mL, there are two significant figures. Compounds are formed when atoms of different elements combine in a fixed ratio. • Compounds are formed when atoms of two or more elements combine in a fixed ratio to each other. Elements: It is the simplest form of the matter. Today, dysentery and pneumonia are curable due to discovery of sulpha drugs and penicillin life-saving drugs. It is obtained by multiplying the atomic mass of each element by number of its atoms and adding them together. -> Thermometres with Fahrenheit scale are calibrated from 32°F to 212°F. CBSE Guide Some Basic Concepts of Chemistry class 11 Notes. 2. Topics Unit 1 Some Basic Concepts of Chemistry 1.1 Importance of Chemistry 1.2 Nature of Matter 1.3 Properties of Matter and their Measurement 1.4 Uncertainty in Measurement 1.5 Laws of Chemical Combinations 1.6 Dalton’s … (i) Homogeneous mixtures: A mixture is said to be homogeneous if it has a uniform composition throughout and there are no visible boundaries of separation between the constituents. They all contain atoms of one type. Molecular mass of methane (CH4) Molality The ratio is = 1 : 2 : 1 The empirical formula of glucose = CH20 (i) Law of Conservation of Mass (ii) Organic Compounds are the compounds which are present in plants and animals. (iv) Law of Gaseous Volume (Gay Lussac’s Law) In addition … Ch 5: States of Matter. SI unit of mass is kilogram. The amount of products formed then depends upon the reactant which has reacted completely. Counting numbers of objects. There are two classifications of matter: physical and chemical. • All substances contain matter which can exist in three states — solid, liquid or gas. For example, CNG (Compressed Natural Gas), a substitute of petrol, is very effective in checking pollution caused by automobiles. Pure Substances 2. 1. askIITians offers tutorials on all significant topics of Chemistry including Physical Chemistry, Inorganic Chemistry & Organic Chemistry. • Avogadro number: The number of atoms, molecules or any other particles present in a given system are expressed in terms of Avogadro constant. They are polluting environment at an alarming rate. 7. Atoms of different elements differ in mass. Some other substances having tinting property were kamplcica, pattanga and jatuka. (B) In Health and Sanitation: Anything that has mass and occupies space is known as matter. • Mass and Weight (iii) Law of Multiple Proportions For example, the formula of hydrogen peroxide is H202. It is found that there is no change in weight though a physical change has taken place. VIEWS. • Laws of Chemical Combinations A pure chemical compound always consists of the same elements combined together in a fixed proportion by weight. Cisplatin and taxol have been found to be very effective for cancer therapy and AZT (Azidothymidine) is used for AIDS victims. 5, In a mixture, the constituents do not lose their identities i.e., a mixture shows the characteristics of all the constituents . These are given below: unit. Some Basic Concepts of Chemistry Class 11 Notes Chapter 1 • Importance of Chemistry Chemistry has a direct impact on our life and has wide range of applications in different fields. (iii) The use of preservatives has helped to preserve food products like jam, butter, squashes etc. But even if you are not, you must know some basic concepts of Chemistry. Division of Numbers: 4.2211÷3.76 = 1.12263 • Mole Concept For example, molecular formula of hydrogen peroxide = H202and Glucose = C6H1206 Molecular Mass Some basic laws and theories in chemistry such as Dalton’s atomic theory, Avogadro law, and the law of conservation of mass are also discussed in this chapter. Anything which has mass and occupies space is called matter. In order to get the simplest whole number of the atoms, www.free-education.in is a platform where you can get pdf notes from 6th to 12th class notes,… Organic Chemistry Some Basic Principles and Techniques Chemistry Chapter 12 • Organic Chemistry Organic chemistry is the branch of chemistry that deals with the study of hydrocarbons and their derivatives. However, a popular unit of measuring volume, particularly in liquids is litre (L) but it is not in SI units or an S.I. Sometimes, in alchemical equation, the reactants present are not the amount as required according to the balanced equation. Click here. It is equal to the mass of the international prototype (A) Physical Classification: • Uncertainty in Measurements Now let us see how calculations are carried out with numbers expressed in scientific notation. 1. The method used to accomplish this is called factor label method or unit factor method or dimensional analysis. (i) It has provided mankind with a large number of life-saving drugs. The law was established by a French chemist, A. Lavoisier. (A) In Agriculture and Food: Structure of Atom . 3. Class 11 Chemistry Notes for Some Basic Concepts of Chemistry – Get here the Notes, Question & Practice Paper of Class 11 Chemistry for topic Some Basic Concepts of Chemistry. 1. The formula of the compound which gives the simplest whole number ratio of the atoms of yarious elements present in one molecule of the compound. It is denoted by m. CompoUnds are always homogeneous i.e., they havethe same composition throughout. The Shapes of Carbon Compounds: In organic or carbon compounds, s and p orbitals are involved in hybridisation. 4. If you have any Query or Doubt, Let us know in the comment sectionFollow us to stay updated with Education and Career related NewsFacebook | Twitter | Instagram| Youtube. Some Basic Concepts of Chemistry Class 11 Notes- The chapter tells the importance of chemistry. Ch 8: Redox Reactions. Weight of substance may vary from one place to another due to change in gravity. (i) Skill and accuracy of the worker (ii) Limitations of measuring instruments. Metre: It is the length of the path travelled by light in vacuum during a time interval of 1/299792458 of a second. Share on Facebook Share on Twitter. (ii) Disinfectants such as phenol are used to kill the micro-organisms present in drains, toilet, floors etc. Handwritten Notes, NEET 2020, NEET 2021, NEET Aspirants, Physical Chemistry, Organic Chemistry, Inorganic Chemistry, Kota notes, Topper Notes, NEET MOST WANTED notes, Allen Notes, Aakash Notes, Disclaimer: This blog does no longer very own this e-book … (i) Law of Conservation of Mass • Dalton’s Atomic Theory Ch 7: Equilibrium. The errors which arise depend upon two factors. Join Our Telegram Channel... Users. IIT JEE handwritten notes pdf for Class 11 and Class12 (Chemistry) INORGANIC. It is an exponential notation in which any number can be represented in the form N x 10n where n is an exponent having positive or negative values and N can vary between 1 to 10. This leads to y three types of […] Free PDF download of Class 11 Chemistry revision notes & short key-notes for Chapter 12 - Organic Chemistry - Some Basic Principles and Techniques to score high marks in exams, prepared by expert Chemistry teachers from latest edition of CBSE(NCERT) books. • Mixtures: Many of the substances present around us are mixtures. Gases • Multiplication and Division of Significant Figures 0. Some Basic Concepts of Chemistry . -> Thermometres with Celsius scale are calibrated from 0°C to 100°C. Mathematically, Mixtures may be either homogeneous or heterogeneous in nature. Refer the revision notes to shine in Chemistry. (v) Avogadro’s Law: Avogadro proposed that, equal volumes of gases at the same temperature and pressure should contain equal number of molecules. There are certain rules for determining the number of significant figures. These particles may be atoms or molecules. In case n is 1, Molecular formula of a compound = Empirical formula of the compound. For example, Chemical Properties: It requires a chemical change to occur. Characteristics of solids: Solids have definite volume and definite shape. or 20 = 20.000000 Second: It is the duration of 9192631, 770 periods of radiation which correspond to the transition between the two hyper fine levels of the ground state of caesium- 133 atom. The value of n may be 1, 2, 3, 4, 5, 6 etc. Stoichiometry, thus deals with the calculation of masses (sometimes volume also) of the reactants and the products involved in a chemical reaction. Assignment. Molarity • Scientific notation: The measurement of quantities in chemistry are spread over a wide rhnge of 10-31to 1023. (ii) Calculation involving addition and subtraction: For these two operations, the first numbers are written in such a way that they have the same exponent. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. According to this law: Mixtures In order to express its empirical formula, we have to take out a common factor 2. Most of the elements exist as isotopes which are different atoms of the same element with different mass numbers and the same atomic number. Solids: The particles are held very close to each other in an orderly fashion and there is not much freedom of movement. You can practice the questions and check your answers from the solutions given after question. Matter consists of indivisible atoms. • Atomic mass: The atomic mass of an element is expressed relative to 12C isotope of carbon which has an exact value of 12u. For example, Physicswallah Full Chapter Handwritten Notes. mass and they occupy space. 4 In a compound, constituents cannot be separated by physical methods Class 11 Chemistry Handwritten Notes can be downloaded in pdf so that student can assess notes anywhere anytime. Classification of Elements and Periodicity in Properties . Limiting Reactant/Reagent NCERT Solutions Some Basic Concepts of Chemistry – Notes. Liquids 3. Thus, hydrogen, nitrogen and oxygen gases consist of molecules in which two atoms combine to give the respective molecules of the element. The mass of a substance is constant whereas its weight may vary from one place to another due to change in gravity. The simplest whole number ratio of the atoms is 1:1 and the empirical formula is HO. 3. CHEMISTRY NOTES FOR CLASS 11 CHEMISTRY DOWNLOAD IN PDF. When the reactions are carried out in solutions, the amount of substance present in its given volume can be expressed in any of the following ways: There are two ways of classifying the matter: These notes offer students with the detailed explanation of important concepts, summary of the chapters, important points to remember, and derivations of formulae for better comprehension and retaining of the chapters. Si-System: This system of measurement is the most common system employed throughout the world. Molality: It is defined as the number of moles of solute present in 1 kg of solvent. We have provided Some Basic Concepts of Chemistry Class 11 Chemistry MCQs Questions with Answers to help students understand the concept very well. Mass: Mass of a substance is the amount of matter present in it. The rapid industrialisation all over the world has resulted in lot of pollution. Formula Mass Scientists are working day and night to develop substitutes which may cause lower pollution. detergents, metal alloys and other inorganic and organic chemicals including new materials contribute in a big way to the national economy. 2. Therefore, the atomic mass of an element must be its average atomic mass and it may be defined as the average relative mass of an atom of an element as compared to the mass of carbon atoms (C-12) taken as 12w. 1. • Properties of Matter and Their Measurements Fundamental Units: The quantities mass, length and time are called fundamental quantities and their units are known as fundamental units. Molecular formula = n x Empirical formula 2. Ch 4: Chemical Bonding and Molecular Structure. The law states that, under similar conditions of temperature and pressure, whenever gases combine, they do so in volumes which bear simple whole number ratio with each other and also with the gaseous products. • Average atomic mass: Obtained by taking into account the natural aboundance of different isotopes of that element. Physical Properties: Those properties which can be measured or observed without changing the identity or the composition of the substance. If you memorise these notes, you do not need to refer to any … of the kilogram. Filed Under: Chemistry, Class 11, Some basic concepts of chemistry Tagged With: analgesics, antibiotics, antiseptic, chemistry, disinfectants, importance of chemistry, problems caused by progress in chemistry, synthetic fibres, tranquilizer. Some Basic Concepts of Chemistry. Thus, formula mass of NaCl = Atomic mass of sodium + atomic mass of chlorine This reactant which reacts completely in the reaction is called the limiting reactant or limiting reagent. The law states: 3. During the above decomposition reaction, matter is neither gained nor lost. • Stoichiometry and Stoichiometric Calculations 2. For example, let us carry out the addition of three numbers 3.52, 2.3 and 6.24, having different precisions or different number of decimal places. 6. 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