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 least number of significant figures, e.g.. I'm sure after learning these, you might become a fan of Chemistry. Antoine Laurent Lavoisier is called the father of chemistry. Ch 11. It mayor may not be capable of independent existence. 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. An digits are significant except zeros in the beginning of a number. Molecular Mass = average relative mass of one molecule / 1 / 12 th * mass of C-12 atom. 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. In this chapter, laws of chemical combination, Dalton’s atomic theory, mole concept, empirical and molecular formula, stoichiometry and its calculations are discussed. To understand these concepts, Class 11 Chapter 1 Chemistry Notes are prepared by … Chapter 2. 4.6. of metal / wt. Chapter 2. The actual yield of a product in any reaction is usually less than the theoretical yield because of the occurrence of certain side reactions. Nomenclature There are over 6 million known organic compounds. 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. It 15 made up of small particles which have space between them. Jumping into the middle of the science can lead to confusion. Share with your friends. wt. Chapterwise NCERT Solutions for Class 11 Chemistry NCERT Solutions for Class 11 Chemistry Chapter 1 – Some Basic Concepts of Chemistry . Chemistry. 3. The number of elements known till date is 118. 1. View Test Papers of Some Basic Concepts of Chemistry: 4. Thus carbon is always tetracovalent, i.e. The present system of symbols was introduced by Berzelius. 2. Some Basic Concepts of Chemistry . [One amu or u (unified mass) is equal to exactly the 1 / 12th of the mass of 12C atom, i.e., 1 amu or u = 1 / 12 * mass of one carbon (C12) atom. 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. atomic mass can be computed as, = RA(1) * at. CHEMISTRY NOTES FOR CLASS 11 CHEMISTRY DOWNLOAD IN PDF. 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. wt. 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. NCERT Exemplar Problems Class 11 Chemistry Solutions Pdf free download was designed by expert teachers from latest edition of NCERT Exemplar Books to get good marks in board exams. 1. They can possess variable composition and can be separated into their components by some physical methods. of oxygen combined * 8, = wt. Percent yield = actual yield / theoretical yield * 100. (iii) In case of ions, 11 factor is equal to charge of that ion. it forms 4 covalent bonds with other atoms Due to tetravalency of carbon it has a tetrahedron shape. 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I'm sure after learning these, you might become a fan of Chemistry. the volumes of the reacting gases as well as products (if gases) bear a simple whole number ratio. pound (lb) and second (s) as the fundamental units of length, mass and time. Fix the amount of 1 common element and find its ratio with other 2 elements. whenever gases react together. ), (Number of ionisable OH– per molecule is the acidity of a base.). 2. of A / Eq. If you're seeing this message, it means we're having trouble loading external resources on our website. There are some basic concepts which help us to understand chemistry better. CBSE Class 11 Chemistry Notes : Basic Concepts of Chemistry. Course summary; Some basic concepts of chemistry. of metal = wt. Vani Potepalli. 0. 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