NCERT Class 12 Chemistry Part 1 The Solid State
Objectives: After studying this Unit, you will be able to • Describe general characteristics of solid state; • Distinguish between amorphous and crystalline solids; • Classify crystalline solids on the basis of the nature of binding forces; • Define crystal lattice and unit…
NCERT Class 11 Chemistry The s Block Elements
THE s -BLOCK ELEMENTS The s-block elements of the Periodic Table are those in which the last electron enters the outermost s-orbital. As the s-orbital can accommodate only two electrons, two groups (1 & 2) belong to the s-block of the Periodic Table.Group 1 of the Periodic…
NCERT Class 11 Chemistry The p Block Elements
THE p -BLOCK ELEMENTS In p-block elements the last electron enters the outermost p orbital. As we know that the number of p orbitals is three and, therefore, the maximum number of electrons that can be accommodated in a set of p orbitals is six. Consequently there are six…
NCERT Class 11 Chemistry Redox Reactions
REDOX REACTIONS Chemistry deals with varieties of matter and change of one kind of matter into the other. Transformation of matter from one kind into another occurs through the various types of reactions. One important category of such reactions is Redox Reactions. A number of…
NCERT Class 11 Chemistry Organic Chemistry Some Basic Priciples and Techniques
ORGANIC CHEMISTRY – SOME BASIC PRINCIPLES AND TECHNIQUES In the previous unit you have learnt that the element carbon has the unique property called catenation due to which it forms covalent bonds with other carbon atoms. It also forms covalent bonds with atoms of other…
NCERT Class 11 Chemistry Hydrogen
HYDROGEN Hydrogen has the simplest atomic structure among all the elements around us in Nature. In atomic form it consists of only one proton and one electron. However, in elemental form it exists as a diatomic (H2) molecule and is called dihydrogen. It forms more compounds…
NCERT Class 11 Chemistry Hydrocarbons
HYDROCARBONS The term ‘hydrocarbon’ is self-explanatory which means compounds of carbon and hydrogen only. Hydrocarbons play a key role in our daily life. You must be familiar with the terms ‘LPG’ and ‘CNG’ used as fuels. LPG is the abbreviated form of liquified petroleum gas…
NCERT Class 11 Chemistry Environmental Chemistry
ENVIRONMENTAL CHEMISTRY You have already studied about environment in your earlier classes. Environmental studies deal with the sum of all social, economical, biological, physical and chemical interrelations with our surroundings. In this unit the focus will be on…
NCERT Class 11 Chemistry Answer to Some Selected Problems
Please refer to attached file for NCERT Class 11 Chemistry Answer to Some Selected Problems
NCERT Class 11 Chemistry Thermodynamics
THERMODYNAMICS Chemical energy stored by molecules can be released as heat during chemical reactions when a fuel like methane, cooking gas or coal burns in air. The chemical energy may also be used to do mechanical work when a fuel burns in an engine or to provide electrical…
NCERT Class 11 Chemistry Structure of Atom
STRUCTURE OF ATOM The existence of atoms has been proposed since the time of early Indian and Greek philosophers (400 B.C.) who were of the view that atoms are the fundamental building blocks of matter. According to them, the continued subdivisions of matter would ultimately…
NCERT Class 11 Chemistry State Of Matter
STATES OF MATTER INTRODUCTION In previous units we have learnt about the properties related to single particle of matter, such as atomic size, ionization enthalpy, electronic charge density, molecular shape and polarity, etc. Most of the observable characteristics of chemical…
NCERT Class 11 Chemistry Some Basic Concepts Of Chemistry
SOME BASIC CONCEPTS OF CHEMISTRY Chemistry deals with the composition, structure and properties of matter. These aspects can be best described and understood in terms of basic constituents of matter: atoms and molecules. That is why chemistry is called the science of atoms and…
NCERT Class 11 Chemistry Equilibrium
EQUILIBRIUM Chemical equilibria are important in numerous biological and environmental processes. For example, equilibria involving O2 molecules and the protein hemoglobin play a crucial role in the transport and delivery of O2 from our lungs to our muscles. Similar equilibria…