• Atomic Mass = 16.043 u Volume: Volume means the space occupied by matter. • Classification of Matter Common factor = 6 Multiplication of Numbers: 2.2120 x 0.011 = 0.024332 These properties can be classified into twocategories – physical properties and chemical properties.Physical properties are those properties which can be measured or observed without changing the identity or the composition of the substance. (i) Skill and accuracy of the worker (ii) Limitations of measuring instruments. Ionic compounds such as NaCl, KNO3, Na2C03 etc. • Mole Concept These Topper’s Class typed/scanned notes of Some Basic Concept of Chemistry Handwritten Notes in Pdf will help you to understand all key concepts. All the organic compounds have been found to contain carbon as their essential constituent. 3. Class 11 Chemistry notes on Chapter 1 Some Basic Concepts of Chemistry class 11 Notes Chemistry are also available for download in CBSE Guide website. 3. 3. (iii) A low concentration of chlorine i.e., 0.2 to 0.4 parts per million (ppm) is used ’ for sterilization of water to make it fit for drinking purposes. The chapter touches upon topics such as the importance of chemistry, atomic mass, and molecular mass. Such zeros indicates the position of decimal point. Anything which has mass and occupies space is called matter. If two elements combine to form two or more compounds, the weight of one of the elements which combines with a fixed weight of the other in these compounds, bears simple whole number ratio by weight. 1. (i) Law of Conservation of Mass (i) Law of Conservation of Mass It is found that one gram atom of any element contains the same number of atoms and one gram molecule of any substance contains the same number of molecules. With the help of Notes, candidates can plan their Strategy for particular weaker section of subject and study hard. • Differences between Compounds and Mixtures (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. Notes-Class 11-Some Basic Concepts of Chemistry-NCERT Chemistry Chapter-1. FOR FREE DOWNLOAD . Some examples of physical properties are colour, odour, melting point, boiling point etc. Liquids: In liquids, the particles are close to each other but can move around. by Anuj William. 1.5. Kilogram: It is the unit of mass. Thus, hydrogen, nitrogen and oxygen gases consist of molecules in which two atoms combine to give the respective molecules of the element. Mixtures may be either homogeneous or heterogeneous in nature. Thermodynamics . Chapter 1. Now let us see how calculations are carried out with numbers expressed in scientific notation. These are given below: However, atoms of different elements are different in nature. Significant figures are meaningful digits which are known with certainty. (ii) Heterogeneous mixtures: A mixture is said to be heterogeneous if it does not have uniform composition throughout and has visible boundaries of separation between the various constituents. Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry with Answers Pdf free download. In case n is 1, Molecular formula of a compound = Empirical formula of the compound. (ii) It has helped to protect the crops from insects and harmful bacteria, by the use ‘ of certain effective insecticides, fungicides and pesticides. • Average atomic mass: Obtained by taking into account the natural aboundance of different isotopes of that element. The chemical equation is or copper contain single atoms held together as their constituent particles whereas in some others two or more atoms combine to give molecules of the element. Chapter 1 Some Basic Concepts of Chemistry Class 11 Notes; ... Chapter 12 Organic Chemistry Some Basic Principles and Techniques; Chapter 13 Hydrocarbons Class 11 Notes; Chapter 14 Environmental Chemistry Class 11 Notes; Revision notes are very easy to remember because of its format. CHEMICAL BONDING: Download PDF: COORDINATION CHEMISTRY: Download PDF : D-F BLOCK ELEMENTS: Download PDF : HYDROGEN … Density: Density of a substance is its amount of mass per unit volume. Constituents of mixtures can be separated by physical methods. There are seven basic units of measurement for the quantities: length, mass, time, temperature, amount of substance, electric current and luminous intensity. Since water contains hydrogen and oxygen, the percentage composition of both these elements can be calculated as follows: These include acidity, basicity, combustibility etc. The different constituents of a heterogeneous mixture can be seen even with naked eye. For example, A few (i) It has provided mankind with a large number of life-saving drugs. Mass is defined as the amount of matter present in a substance. The following experiments illustrate the truth of this law. mass and they occupy space. Ch 7: Equilibrium. • Percentage Composition Filed Under: Chemistry, Class 11, Some basic concepts of chemistry Tagged With: Dimensional analysis, factor label method About Mrs Shilpi Nagpal Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. In SI units, volume is expressed in metre3 (m3). (iv) Law of Gaseous Volume (Gay Lussac’s Law) In a mixture, or more elements or compounds are simply mixed and not combined chemically. The word ‘stoichiometry’ is derived from two Greek words—Stoicheion (meaning element) and metron (meaning measure). Reactions in Solutions If we consider the reaction of hydrogen and oxygen to produce water, we see that two volumes of hydrogen combine with one volume of oxygen to give two volumes of water without leaving any unreacted oxygen. = 12.011 u + 4 (1.008 u) In a compound, two or more elements are combined chemically. • Units of Measurement (iv) Gay Lussac’s Law of Gaseous Volumes Molecular formula = n x Empirical formula Branches of Chemistry. Stoichiometry, thus deals with the calculation of masses (sometimes volume also) of the reactants and the products involved in a chemical reaction. According to this law: 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. The rapid industrialisation all over the world has resulted in lot of pollution. Based upon the composition, matter can be divided into two main types: (b) When matter undergoes a chemical change. Also, it studies the properties and structure of substances. Share on Facebook Share on Twitter. Weight of substance may vary from one place to another due to change in gravity. examples are: Common salt, marble, gypsum, washing soda etc. Click here. This unit is quite large and a chemist often expresses density in g cm3 where mass is expressed in gram and volume is expressed in cm3. • Multiplication and Division of Significant Figures 3. It has the units of (length)3. Structure of Atom . • Molecular Formula (a) Combination between hydrogen and chlorine: That's great! Atoms of different elements differ in mass. The compounds have been classified into two types. By practicing this resources candidates definitely get the idea of which his/her weak areas and how to prepare well for the examination. (B) In Health and Sanitation: But it has to be reported only up to two decimal places, i.e., the answer would be 11.36. • Atomic mass: The atomic mass of an element is expressed relative to 12C isotope of carbon which has an exact value of 12u. 1L = 1000 mL = 1000 cm3 = 1dm3. NCERT Solutions Some Basic Concepts of Chemistry – Notes. In a mixture the constituents are not present in fixed ratio. CHEMISTRY NOTES FOR CLASS 11 CHEMISTRY DOWNLOAD IN PDF. Volume of liquids can be measured by different devices like burette, pipette, cylinder, measuring flask etc. 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. For example, decomposition of mercuric oxide. Poisonous gases and chemicals are being constantly released in the atmosphere. (iii) The use of preservatives has helped to preserve food products like jam, butter, squashes etc. Let us consider the combustion of methane. Often while calculating, there is a need to convert units from one system to other. 1. Ch 6: Thermodynamics. Ch 3: Classification of Elements and Periodicity in Properties. Molarity: It is defined as the number of moles of solute in 1 litre of the solution. 1. Notes will be delivered asap. 3. (i) Calculation involving multiplication and division • Laws of Chemical Combinations are: Click here . 3. MCQs. Weight: It is the force exerted by gravity on an object. Zeros at the end or right of a number are significant provided they are on the right side of the decimal point. But even if you are not, you must know some basic concepts of Chemistry. (ii) Disinfectants such as phenol are used to kill the micro-organisms present in drains, toilet, floors etc. Molecular Mass In other words, matter can neither be created nor destroyed. Scientists are working day and night to develop substitutes which may cause lower pollution. For example, Characteristics of solids: Solids have definite volume and definite shape. • Balanced chemical equation: A balanced equation has the same number of atoms of each element on both sides of the equation. This article has highlighted some basic concepts of chemistry in the form of notes for class 11 students in order to understand the chapter with ease. Anything that has mass and occupies space is known as matter. e.g. 4. askIITians offers tutorials on all significant topics of Chemistry including Physical Chemistry, Inorganic Chemistry & Organic Chemistry. Class 11 Chemistry Handwritten Notes can be downloaded in pdf so that student can assess notes anywhere anytime. This leads to y three types of […] They are polluting environment at an alarming rate. For example, molecular formula of hydrogen peroxide = H202and Glucose = C6H1206 BY JOYOSHISH SAHA. 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. Answers of assignment are given at the end of each assignment with complete solutions. 5. Click here. Class 11 Chemistry Printed Notes will be provided in by Speed Post. For a solution containing n2 moles of the solute dissolved in n1 moles of the solvent, Today, dysentery and pneumonia are curable due to discovery of sulpha drugs and penicillin life-saving drugs. Molarity I'm sure after learning these, you might become a fan of Chemistry. In such cases, the formula is used to calculate the formula mass instead of molecular mass. (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. Physical Properties: Those properties which can be measured or observed without changing the identity or the composition of the substance. Total number of the known elements is 118 out of which 98 elements occur naturally and 20 are formed by artificial transmutation. Subtraction of numbers can be done in the same way as the addition. Click here. 2. It has given units of all the seven basic quantities listed above. Ch 4: Chemical Bonding and Molecular Structure. The law may be illustrated by the following examples. All non-zero digits are significant. Matter can exist in three physical states: In a compound, the elements are present in the fixed ratio by mass. --Every substance has unique or characteristic properties. The errors which arise depend upon two factors. It is obtained by multiplying the atomic mass of each element by number of its atoms and adding them together. Let us understand by taking the example of water (H20). Varähmihir’s Brihat Samhita gives references to perfumes and cosmetics. 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. These are stated below: (i) Inorganic Compounds: These are compounds which are obtained from non-living sources such as rocks and minerals. • Properties of Matter and Their Measurements , 1. Based on NCERT Class 11th Chemistry Chapter 1 . (C) Saving the Environment: In order to express its empirical formula, we have to take out a common factor 2. 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. Thus, formula mass of NaCl = Atomic mass of sodium + atomic mass of chlorine The atomic mass of an element is the number of times an atom of that element is heavier than an atom of carbon taken as 12. (ii) Law of Definite Proportions CBSE Class 11 Chemistry Notes are made strictly according to the NCERT Syllabus by our panel of highly experienced teachers. balance. Avogadro’s Number, NA = 6.022 × 1023 They all contain atoms of one type. 1. • Stoichiometry and Stoichiometric Calculations Fundamental Units: The quantities mass, length and time are called fundamental quantities and their units are known as fundamental units. 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 … Theory. 1. The method used to accomplish this is called factor label method or unit factor method or dimensional analysis. Mixtures: The combination of two or more elements or compounds which are not chemically combined together and may also be present in any proportion, is called mixture. The correct answer = 1.12 (iii) Law of Multiple Proportions for longer periods. However, a popular unit of measuring volume, particularly in liquids is litre (L) but it is not in SI units or an S.I. Get CBSE Class 11 Chemistry chapter notes on ‘Some Basic Concepts of Chemistry’and learn about laws of chemical combinations, mole concept, molarity, molality, etc. We have discussed the physical and chemical classification of matter. Characteristics of liquids: Liquids have definite volume but not definite shape. The mass of a substance is constant whereas its weight may vary from one place to another due to change in gravity. Mathematically, The final result has four decimal places. Moreover, students cannot move to advance topics before completely mastering the … Its symbol is ‘mol’. 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. Chapter 1: Some Basic Concepts of Chemistry; Chapter 2: Structure of Atom Characteristics of Gases: Gases have neither definite volume nor definite shape. • Compounds are formed when atoms of two or more elements combine in a fixed ratio to each other. Cisplatin and taxol have been found to be very effective for cancer therapy and AZT (Azidothymidine) is used for AIDS victims. The amount of products formed then depends upon the reactant which has reacted completely. 5. The students’ grasping power increases as well because Class 11th Chemistry Chapter 1 Notes are detailed and in a simplified format to support better learning. Ch 8: Redox Reactions. We have provided Some Basic Concepts of Chemistry Class 11 Chemistry MCQs Questions with Answers to help students understand the concept very well. The formula of a compound which gives the actual ratio of the atoms of various elements present in one molecule of the compound. Chemical Bonding and Molecular Structure. 3. The examples of chemical properties are characteristic reactions of different substances. do not consist of molecules i.e., single entities but exist “as ions closely packed together in a three dimensional space as shown in -Fig. • Stoichiometry: The quantitative study of the reactants required or the products formed is called stoichiometry. For example: When iron filings and sulphur powder are mixed together, the mixture formed is heterogeneous. Mixtures. Metre: It is the length of the path travelled by light in vacuum during a time interval of 1/299792458 of a second. These are neither created nor destroyed in a chemical reaction. Class 11 Chemistry Concepts of Chemistry: Mass & Weight: Mass & Weight. E.g. (i) It has provided chemical fertilizers such as urea, calcium phosphate, sodium nitrate, ammonium phosphate etc. N.C.E.R.T Chapter 01. (ii) Organic Compounds are the compounds which are present in plants and animals. Mole fraction Also, we do not need to open several books as all points are available in one place. • Avogadro number: The number of atoms, molecules or any other particles present in a given system are expressed in terms of Avogadro constant. Ampere: The ampere is that constant current which if maintained in two straight parallel conductors of infinite length, of negligible circular cross section and placed, 1 metre apart in vacuum, would produce between these conductors a force equal to 2 x 10-7 N per metre of length. 1. (A) In Agriculture and Food: About Mrs Shilpi Nagpal Some Basic Concepts of Chemistry Class 11 Notes aims at easing out the student's learning and revision process. It can vary 55. In addition … According to the rule the final result = 0.024 Most of the elements exist as isotopes which are different atoms of the same element with different mass numbers and the same atomic number. 4. It is usually represented by NA: CBSE Guide Some Basic Concepts of Chemistry class 11 Notes. There are two classifications of matter: physical and chemical. Solids 2. Where n is the common factor and also called multiplying factor. 4 In a compound, constituents cannot be separated by physical methods 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. So, SI unit of density can be obtained as follows: i.e., 2 = 2.000000 • Dimensional analysis: It helps to express the measured quantities in different systems of units. (B) Chemical classification (v) Avogadro’s Law. For example, carbohydrates, proteins, oils, fats etc. 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. CBSE Class 11 Chemistry Notes : Basic Concepts of Chemistry. 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. 4. (v) Avogadro’s Law: Avogadro proposed that, equal volumes of gases at the same temperature and pressure should contain equal number of molecules. All the atoms of a given element have identical properties including identical mass. The reactant which is not consumed completely in the reaction is called excess reactant. Antoine Laurent Lavoisier is called the father of chemistry. For example, book, pencil, water, air are composed of matter as we know that they have (ii) Compounds: It may be defined as a pure substance containing two or more elements combined together in a fixed proportion by weight and can be decomposed into these elements by suitable chemical methods. Counting numbers of objects. VIEWS. (b) Combination between nitrogen and hydrogen: The two gases lead to the formation of ammonia gas under suitable conditions. 0. Are you one of those who loves Chemistry? 2. Refer the revision notes to shine in Chemistry. Thus, 2.005 has four significant figures. 3. After that, the coefficients are added or subtracted as the case may be. Classification of Elements and Periodicity in Properties . (iii) Law of Multiple Proportions For example, 0.03 has one significant figure and 0.0052 has two significant figures. SHARES. Chemistry has a direct impact on our life and has wide range of applications in different fields. 4. • Empirical Formula • Importance of Chemistry Some Basic Concepts of Chemistry Class 11 Notes- The chapter tells the importance of chemistry. Limiting reagent is very effective for cancer therapy and AZT ( Azidothymidine ) is equal to mass... • mixtures: many of the atoms substance is constant whereas its weight may vary from one place another! Actual masses of the path travelled by light in vacuum during a time interval of 1/299792458 a... Moreover, the answer would be 11.36 interval of 1/299792458 of a particular component to the total mass of same... 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