Plus Two Chemistry Solid state| Imperfections in solids| Part 5

🔹 +2 Chemistry Final Exam Special :- Important Topics Video Classes 🔹 ♦️ ZENITH INTELLECTUS ♦️ 1. Solid State Part 1    • Plus Two Chemistry Solid State part 1 (Mal...   Part 2    • Plus Two Chemistry Solid State Part 2   Part 3    • Packing efficiency. 12th Chemistry. Solid ...   Part 4    • Unit Cell & Z value. Solid state Plus Two ...   Part 5    • Plus Two Chemistry Solid state| Imperfecti...   ---------------------------------- Solution    • Henry's Law & Raoult's law| 12 Chemistry| ...   --------------------------------- Nernst equation    • Nernst Equation & its derivation for Danie...   ---------------------------------- Chemical kinetics    • +2 SAY/ Improvement Chemistry| Chemical Ki...      • Plus Two Chemistry Most Important derivati...   --------------------------------- Surface chemistry    • +2 Chemistry Focus Area| Surface Chemistry...   --------------------------------- Metallurgy    • Plus two Focus Points | Refining | Chemist...   --------------------------------- P-block elements    • +2 Chemistry| p Block| Focus Area| Inter H...   --------------------------------- Cordination compounds    • Coordination compounds| Nomenclature| Sure...   --------------------------------- Organic Chemistry Halo Alkanes & Halo Arenes    • Organic Chemistry Focus Area | Plus two| ഇ...   Alcohol, Phenols & Ethers    • Organic Chemistry +2 Alcohols Phenols and ...   Aldehydes Ketones & Acids Part 1    • +2 Chemistry| Aldehydes ketones & Acids| പ...   Part 2    • +2 Organic Chemistry| Most Important Named...   Amines Part 1    • +2 Organic Chemistry| Amines| Focus Area| ...   Part 2    • +2 Organic Chemistry| Amines | Part 2| Foc...   ---------------------------------- SN1 & SN2 mechanism    • SN1 & SN2 Mechanism | വളരെ ഈസിയായി പഠിച്ചെ...   -------------------------------------- Ellingham diagram    • Ellingham diagram| +2 Chemistry | Most eas...   ------------------------------------- All The Best For Your Exams.. *പഠനത്തിൽ എന്നും കൂടെ കാണും*🥰💯🥇 imperfections in solids, point defect, line defect, schottky and frenkel defects and anion vacancy. Definition of F centre. Point defects explain about the imperfections of solids along with the types of point defects. Crystalline solids are formed by joining a large number of small crystals. Different types of defects are found in crystals after the process of crystallization. Point defects are accounted for when the crystallization process occurs at a very fast rate. These defects mainly happen due to deviation in the arrangement of constituting particles. In a solid, when the ideal arrangement of solids is distorted around a point/ atom it is called a point defect. Defects or Imperfections in crystalline solid can be divided into four groups namely line defects, point defects, volume defects and surface defects. Historically, crystal point defects were first regarded in ionic crystals, not in metal crystals that were much simpler. There are 3 types of point defects: Stoichiometric defect Frenkel defect Schottky defect 1. Stoichiometric Defect: In this kind of point defect, the ratio of positive and negative ions (Stoichiometric) and electrical neutrality of a solid is not disturbed. Sometimes it is also known as intrinsic or thermodynamic defects. Fundamentally, they are of two types: Vacancy defect: When an atom is not present at their lattice sites, then that lattice site is vacant and it creates a vacancy defect. Due to this, the density of a substance decreases. Interstitial defect: It is a defect in which an atom or molecule occupies the intermolecular spaces in crystals. In this defect, the density of the substance increases. A non-ionic compound mainly shows vacancy and interstitial defects. An compoundshows the same in Frenkel and Schottky defect. 2. Frenkel Defect: In ionic solids generally, the smaller ion (cation) moves out of its place and occupies an intermolecular space. In this case, a vacancy defect is created on its original position and the interstitial defect is experienced at its new position. It is also known as dislocation defect. The density of a substance remains unchanged. It happens when there is a huge difference in the size of anions and cations. Example: ZnS Schottky Defect This kind of vacancy defects is found in Ionic Solids. But in ionic compounds, we need to balance the electrical neutrality of the compound so an equal number of anions and cations will be missing from the compound. It reduces the density of the substance. In this, the size of cations and anions are of almost the same.