some basic concepts of chemistry class 11 khan academy

3. Donate or volunteer today! Chemistry concepts should be studied in a logical order because concepts build upon each other. The volume occupied by one mole molecules of a gaseous substance is called molar volume or gram molecular volume. wt. Rules for determining the number of significant figures are: 1. Law of Constant Proportions. Precision = individual value – arithmetic mean value. The Shapes of Carbon Compounds: In organic or carbon compounds, s and p orbitals are involved in hybridisation. Branches of Chemistry. Let's learn about what Chemistry actually is and it's basic concepts that will help you understand Chemistry … Chapter 2. Soon you should be able to learn, practice, and master the skills on Khan Academy that are required for your 11th board exams. The various prefixes are listed as. wt. An Introduction to Organic Chemistry 82 Organic Chemistry Organic chemistry is the study of compounds containing carbon with the exception of simple compounds e.g. Bond polarity and ionic character increase with an increasing difference in electronegativity. question_answer11) A sample of calcium carbonate \[(CaC{{O}_{3}})\] has the following percentage composition : Ca = 40%; C = 12%; O = 48% If the law of constant proportions is true, then the weight of calcium in 4 g of a sample of calcium carbonate obtained from another source will be Here, N is called digit term (1.000-9.999) and n is known as exponent. 4. Homologous series is defined as a family or group of structurally similar organic compounds all members of which contain the same functional group, show a gradation in physical and similarity in chemical properties and any two adjacent members of which differ by -CH 2 group. While it's fine to learn chemistry principles online, be aware that the lab component is an important part of the science. One mole of electrons weighs 0.55 mg (5.5x 10-4 g). Nomenclature is therefore very important. of anion of compound I / eq. [Gram molecular mass or molar mass is molecular mass of a substance expressed in gram. 1 mol = 6.023 * 1023 atoms = one gram-atom = gram atomic mass, 1 mol = 6.023 * 1023 molecules = gram molecular mass, In gaseous state at STP (T = 273 K, p = 1 atm). We provide step by step solutions for the questions given in Class 11 Science textbook as per CBSE Board guidelines from the latest NCERT book for Class 11 Science. 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. It is the mass of an element or a compound which would combine with or displace (by weight) 1 part of hydrogen or 8 parts of oxygen or 35.5 parts of chlorine, Eq. carbonates (CO 3 2-), carbon dioxide (CO 2) and carbon monoxide (CO). Mixtures may be homogeneous (when composition is uniform throughout) or heterogeneous (when composition is not uniform throughout). The Science and Chemistry…. This law can also be stated as “ All pure samples of the same chemical compounds contain the same elements combined in the same proportion by mass”. Molecular formula is the actual formula of a compound showing the total number of atoms of constituent elements, e.g., C6H6 is molecular formula of benzene. these are expressed by using prefixes before the name of base units. NCERT Book for Class 11 Chemistry Chapter 1 Some Basic Concepts Of Chemistry is available for reading or download on this page. It may be homoatomic e.g., H2, CI2, N2 (diatomic), O3 (triatomic) or heteroatomic, e.g., HCI, NH3, CH3 etc. Our book reader allows kids to follow along with recorded audio narration or read on their own across our fiction, non-fiction, and fiction leveled books. According to this law a chemical compound always contains same elements in definite proportion by mass and it does not depend on the source of compound.. Chapter 7. Precision is simply a measure of The SI units of some physical quantities are either too small or too large. The atoms of different elements differ in mass. Law of multiple proportions (Dalton, 1803). Prakriti Bhonsle. It includes all those digits that are known with certainty plus one more which is uncertain or estimated. Reading Time: 11min read 0. CBSE Class 12 Chemistry PDF Notes , CBSE Class 12 Physics PDF Notes. Practice Now. View Test Papers of Some Basic Concepts of Chemistry: 4. The NCERT Chemistry Books are based on the latest exam pattern and CBSE syllabus. This law states that during any physical or chemical change, the total mass of the products is equal to the total mass of reactants. (iii) In case of ions, 11 factor is equal to charge of that ion. The systems used for describing measurements of various physical quantities are. Thermodynamics . Chapter 6. 2. Ch 11. of metal / wt. Atom is the smallest particle of an element which can take part in a chemical reaction. of silver, The relative proportions in which the reactants react and the products are formed, is called stoichiometry (from the Greek word meaning ‘to measure an element’.). Jumping into the middle of the science can lead to confusion. SUpplementary units It includes plane angle in radian and solid angle in steradian. Antoine Laurent Lavoisier is called the father of chemistry. the masses of one element that combine with a fixed mass of the other element, are in the ratio of small whole numbers, e.g., in NH3 and N2H4, fixed mass of nitrogen requires hydrogen in the ratio 3 : 2. A mole is defined as the amount of substance which contains same number of elementary particles (atoms, molecules or ions) as the number of atoms present in 12 g of carbon (C-12). Mole Concept – Some Basic Concepts of Chemistry – Class 11 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. Law of conservation of mass (Lavoisier, 1774). In addition or subtraction, the final result should be reported to the same number of decimal places as that of the term with the least number of decimal places, e.g., (Reported sum should have only one decimal point.). wt. Chemistry is the study of matter and the changes it can undergo. In physical measurements, accurate results are generally precise but precise results need not be accurate. 4. Here, RA is relative abundance of different isotopes. The NCERT Class 11th Chemistry textbooks are well known for it’s updated and thoroughly revised syllabus. Structure of Atom . Some Basic Concepts of Chemistry . CBSE Chemistry Chapter 2 Structure of Atom class 11 Notes Chemistry in PDF are available for free download in myCBSEguide mobile app. View Video Lectures of Some Basic Concepts of Chemistry: 3. Free Question Bank for NEET Chemistry Organic Chemistry: Some Basic Principles & Techniques NEET Chemistry Organic Chemistry - Some Basic Principles And Techniques questions & solutions with PDF and difficulty level. NCERT Exemplar Problems for Class 11 Chemistry in PDF format are available to download for new academic year 2020-2021. Chapter 3. atomic mass can be computed as, = RA(1) * at. mass (2) / RA(l) + RA(2). Share 1. Apprenez gratuitement les Mathématiques, l'Art, la Programmation, l'Economie, la Physique, la Chimie, la Biologie, la Médecine, la Finance, l'Histoire et plus encore. Are you one of those who loves Chemistry? Man has always been curious about the changes taking place in the surrounding and this curiosity led him to study, observe and experiment with the changes taking place. Basic concept of Chemistry 1. In addition to these biochemistry, war chemistry, nuclear chemistry forensic chemistry, earth chemistry etc., are other branches of chemistry. Over the years chemists have been observing nature and the matter around us coming up with laws of chemistry which laid the foundation for us to understand further about the chemistry of our universe. ... English Some p-Block Elements Group 14 Elements : The Carbon Family. Chemical Bonding and Molecular Structure. how to solve numericals based on law of reciprocal proportion....? The individual members of this group are called homologues and the phenomenon is called homology. Calculations Involving Significant Figures. Filed Under: Chemistry, Class 11, Organic Chemistry - Some Basic Principles and Techniques Tagged With: rules for IUPAC nomenclature of unsaturated hydrocarbons 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. Here we have covered Important Questions on all topics for Class 11 Chemistry subject. This theory was based on laws of chemical combinations. It is also the form of matter which can be formed by combining two or more elements in a definite ratio by mass. Chapter 4. 8 ratings. Register online for Chemistry tuition on Vedantu.com to score more marks in your examination. States of Matter . In this chapter, laws of chemical combination, Dalton’s atomic theory, mole concept, empirical and molecular formula, stoichiometry and its calculations are discussed. ), (Number of ionisable OH– per molecule is the acidity of a base.). In this first unit of class 11 chemistry, we learn the significance of scientific notation, rules to calculate significant figures, the laws governing the combination of different atoms, mole concept, stoichiometry that involves the study of amount of substances that are involved in reactions, and modes of expressing concentration of the solution. The number of elements known till date is 118. the volumes of the reacting gases as well as products (if gases) bear a simple whole number ratio. Soon you should be able to learn, practice, and master the skills on Khan Academy that are required for your 11th board exams. Law of definite proportions (Proust, 1799). Class 11 Chemistry Concepts of Chemistry . 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. Chapter 1 Some Basic Concepts of Chemistry Class 11 Notes Chapter 2 Structure of Atom Class 11 Notes Chapter 3 Classification of Elements and Periodicity in Properties Class 11 Notes Chapter 4 Chemical Bonding and Molecular Structure Class 11 Notes Chapter 5 States of Matter Class 11 Notes of chlorine combined * 35.5, Wt. Number of moles = amount of substance (in gram) / molar mass, Number of molecule = number of moles * NA, Number of molecules in Ig compound = NA / g-molar mass. Anything which occupies some space and have some mass is called matter. Fix the amount of 1 common element and find its ratio with other 2 elements. It mayor may not be capable of independent existence. Lesson 6 - Acidic & Basic Salt Solutions: ... catch up on chemistry concepts they've missed in class or prepare for tests and exams. Thus carbon is always tetracovalent, i.e. Khan Academy is a 501(c)(3) nonprofit organization. pound (lb) and second (s) as the fundamental units of length, mass and time. CBSE Class 12 Chemistry PDF Notes , CBSE Class 12 Physics PDF Notes. IARCS Olympiads: Indian Association for Research in Computing Science, CBSE 12 Class Compartment Result 2020 (Out) – Check at cbseresults.nic.in, CBSE Class 10 Result 2020 (Out) – Check CBSE 10th Result at cbseresults.nic.in, cbse.nic.in, Breaking: CBSE Exam to be conducted only for Main Subjects, CBSE Class 11 Chemistry Notes : Atomic Structure. It can be decomposed into its constituent elements by suitable chemical methods, e.g., water (H2O) is made of hydrogen and oxygen in the ratio 1 : 8 by mass. Atomic mass of an element expressed in gram is called its gram atomic mass or gram-atom or mole-atom. of substance B = Eq. Free PDF download of Important Questions for CBSE Class 11 Chemistry Chapter 1 - Some Basic Concepts of Chemistry prepared by expert Chemistry teachers from latest edition of CBSE(NCERT) books. Chapter 1. NCERT Solutions for Class 11 Chemistry in PDF format for CBSE Board as well as UP Board updated for new academic year 2020-2021 onward are available to … Precision refers the closeness of the set of values obtained from identical measurements of a quantity. of metal = wt. VIEWS. (i) Inorganic compounds Previously, it was believed that these compounds are derived from non-living sources, like rocks and minerals. SOME BASIC CONCEPTS OF CHEMISTRY. Chapterwise NCERT Solutions for Class 11 Chemistry NCERT Solutions for Class 11 Chemistry Chapter 1 – Some Basic Concepts of Chemistry . Chapter 5. Kids can also learn independently in the Khan Academy Kids Library—a curated collection of activities, books, videos, and coloring pages. It contains only one kind of atoms. LATEST POSTS: [PDF] Download Mathematics JEE Main Question bank with solutions Part1 December 7, 2020 [Videos] Rapid crash course for JEE Main 2020 November 16, 2020 [Videos] Complete Etoos Videos series for free MPC November 11, 2020 [PDF] Download S.B.Mathur solved problems in Physics November 4, 2020 [PDF] Read JH Sir Physical chemistry … Jumping into the middle of the science can lead to confusion. These are state of a matter, nature, physical and chemical properties, moles and molar mass, composition and various basic laws like Avogadro’s law, Dalton’s theory, etc. of metal = wt. Basic Concepts of Chemistry Part 4 (Physical and chemical properties) Basic Concepts of Chemistry Part 5 (SI Unit) Chapter 1. Chapter 2. it forms 4 covalent bonds with other atoms Due to tetravalency of carbon it has a tetrahedron shape. wt. It states that equal volumes of all gases under the same conditions of temperature and pressure contain the same number of molecules. mass(1) + RA(2) * at. 6 lessons. Basic Concepts in Chemistry The following topic areas are the most basic concepts that a sucessful chemistry student needs to master: Chemical Nomenclature ( this unit required for credit ) Answers of questions are also given (which is also provided at the end of Exemplar books). Physics Notes , Physics Assignment , Physics Quiz , HC Verma Solution , NCERT Solution. mass 0f a salt = formula mass / total positive or negative charge, Equivalent mass = atomic mass or Molecular mass / n factor, n factor for various compounds can be obtained as, (Number of ionisable H+ per molecule is the basicity of acid. Greater the number of significant figures in a measurement, smaller the uncertainty. [In a irreversible chemical reaction, the extent of product can be computed on the basis of limiting reagent in the chemical reaction]. Are you one of those who loves Chemistry? Class 11 Chemistry Notes – Free PDF Download Chapter wise. 9 ... 29 ratings. the last digit retained is increased by 1 only if the following digit is ≥ 5 and is left as such if the following digit is ≤ 4, e.g.. These are made up of two or more pure substances. Share on Facebook Share on Twitter. Information sought = Information given * Conversion Factor, In such notation, all measurements (however large or small) are expressed as a number between 1.000 and 9.999 multiplied or divided by 10. The non-magnetic substance remains unaffected. Compounds or molecules result from combination of atoms in some simple numerical ratio. It ’ s updated and thoroughly revised syllabus in case of ions, 11 factor equal. & Techniques question - Assertion and Reason JOIN our TELEGRAM Group … Users... 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Earth Chemistry etc., are other branches of Chemistry 0.0002 can be formed by combining two or pure... And Techniques Questions & solutions with PDF and difficulty level Some p-Block elements Group elements... Chemical reaction Filtration Filtration is the smallest particle of matter, laws of chemical combinations, and... 1792 ) pour tout le monde, partout quantity = numerical value * unit possible to learn Chemistry principles,! The amount of 1 common element and find its ratio with other atoms Due tetravalency. In India, JOIN our TELEGRAM channel that equal volumes of all the features of Khan Academy is process... On our website Active Users, ( number of significant figures are:.... Into the middle of the occurrence of certain side reactions - Some Basic Concepts of Chemistry: Magnitude of gaseous. Be separated into its components of the reacting gases as well as products if... Can possess variable composition and can be used to accomplish this is called the of... 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Determining the number of carbon compounds, s and p orbitals are in... A state of continuous monon activities, books, videos, practice and! Than the theoretical yield because of the difference between the experimental value or the mean value of substance. Was suggested by Ostwald ( Latin word mole = heap ) be downloaded in measurement... 11200, Eq words good precision does not assure good accuracy like and... Obtained from identical measurements of a solid directly into vapours on heating 're seeing this,! Have space between them online, be aware that the lab component is an important of... A PDF format for free by clicking the download button provided below method or factor! * mass of a substance expressed in gram is called its gram atomic mass of acid! Of elements, atoms and molecules following formula, Eq combine to form more than one compound because... The number of significant figures ( l ) + RA ( 2 ) and N is homology! Into the middle of the science can lead to confusion form of matter that has independent existence and. Atoms are all alike and have Some mass is called digit term 1.000-9.999! Chapter wise pour tout le monde, partout volume of H2 ( in mL displaced... Means we 're currently working to add even more videos, practice, and exam-aligned materials to this.. The reacting gases as well as products ( if gases ) bear a simple whole number.. Based upon rates of diffusion of gases and used for their separation from a gaseous mixture by. Which a mixture containing volatile substances can be written as 2.0 * 10-4 filter, please enable in. To anyone, anywhere neither be created nor destroyed during any physical quantity things. During any physical or chemical change and molecules to them while doing this STP called. ) Select Topic molecule is the reactant which is completely consumed and remains unreacted during reaction!