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Characteristics of amorphous solids: The extra voltage thus required is called over voltage or bubble voltage. Sign up to view the full version. Industries are good means of livelihood which strengthen the national economy. It is the ease of flow of electric current through the conductor. The tendency to gain electrons in the above case is known as reduction potential. Share this link with a friend: This defect arises because of absence of metal ions from its lattice sites. Classification of solids based on their electrical conductivities: This defect results in increase in density of the substance.
It is the arrangement of electrodes in the increasing order of their standard reduction electrochemistry notes for class 12 pdf download.
For metals to be deposited on the cathode during electrolysis, the voltage required is almost the same as the standard electrode potential. This way the spheres are aligned horizontally as well as vertically.
Chemistry Notes for Class 12 Chapter 3 Electrochemistry
Oxidation potential The tendency to lose electrons in the above case electrocbemistry known as oxidation potential. Its units are ohm -1 cm 2 equiv -1 or mho cm 2 equiv -1 or Electrochemistry notes for class 12 pdf download cm 2 g-equiv The three dimensional structure is called cubic close packed structure or face centered cubic structure.
Strong electrolytes The electrolytes that completely dissociate or ionise into ions are called strong electrolytes. The number of odwnload voids present in a lattice is equal to the number of close packed particles.
They possess an average valency of 4.
Electro Chemistry – Class 12 chemistry hindi medium ebook, notes & PDF download
Here, these spheres of these bond row are placed above the first one in as taggered manner in such a way that its spheres fit in the depression of the first row. Batteries and cells used in various instruments. Coordination number is the number of nearest neighbours nootes a particle.
Chemicals are used in all the industries like agriculture, animal husbandry, fishery, wood, textile and food industries.
These notes will provide you overview of the chapter and important points to remember. If any pdf file have any copyright voilation please inform us we shell remove that file from our website.
The lattice is simple cubic lattice.
Transport number or Transference number The current flowing through an electrolytic solution is carried by the ions. Line defects- Line defects are the irregularities or deviations from ideal arrange ment in entire rows of lattice points. By cathodic protection in which a metal is protected from corrosion by connecting it to another metal that is more easily oxidised. Coulombic or Electrostatic Electrical Conductivity: Centered unit cells are those unit cells in which one or more constituent particles are present at positions in addition to those present at the corners.
CBSE short notes of 12th class Chemistry. The electrode potential is only the difference of otentials electrochemistry notes for class 12 pdf download two electrodes that we can measure by combining them to give electrochemistry notes for class 12 pdf download complete cell.
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There is no evolution of heat. When an appropriate impurity is added to an intrinsic semiconductor, it is called extrinsic semi conductors. Conductance G It is the ease of flow of electric current through the conductor.
Number of atoms in different unit cells: Strains in the metal 5. These are those substances which are weakly attracted by the magnetic field. For a electrochemical cell, Concentration of pure solids and liquids is taken as unity.
Daniell Cell An electrochemical cell of electrochemistry notes for class 12 pdf download and copper metals is known as Daniell cell. These are source of electrical energy which may have one or more cells connected in series. Strong electrolytes The electrolytes that completely dissociate or ionise into ions are called strong electrolytes.
These compounds are formed by the combination of group 13 and group 15 compounds. It completes the circuit and allows the flow of current. Electrolytic Conductors or Electrolytes Substances which allow the passage of electricity through their fused state or aqueous solution and undergo chemical decomposition are called electrolytic conductors, e.
They are called true solids. Body electrochemistry notes for class 12 pdf download unit cell: Metallic Conductors or Electronic Conductors Substances which allow the electric current to pass through them by the movement of lectrons are called metallic conductors, e. Electrochemistry is that branch of chemistry which deals with the study of production of electricity from energy released during spontaneous chemical reactions and the use of electrical energy to bring about non-spontaneous chemical transformations.
According to IUPAC convention, the reduction potential alone be called as the electrode potential unless it is specifically mentioned. It maintains the electrical neutrality on both sides.