Coagulation:-Coagulation or precipitation is the process of aggregation together the colloidal particles so as to change them into larged sized particles which ultimately settles as a precipitate Q.17 What are Zeolites or shape selective catalysts? K 2 SO 4, MgCl, K 4 [Fe(CN) 6] 1 2 Describe “electrophoresis” briefly. Huge List of CBSE Chemistry Projects for Class 12, Chemistry Science Fair Projects Free Download, Models, Experiments, Winning CBSE Chemistry Science Experiments,cool and fun interesting investigatory project for chemistry for Kids and also for Middle school, Elementary School for class 5th Grade,6th,7th,8th,9th 10th,11th, 12th Grade and High School , MSC and College Students. Download the PDF Question Papers Free for off line practice and view the Solutions online. (1) By electrophoresis: In electrophoresis the colloidal particles move towards oppositely charged electrode.When these come in contact with the … Cataphoresis is the process used for the coagulation of colloids. Coagulation, also known as clotting, is the process by which blood changes from a liquid to a gel, forming a blood clot. Why are powdered substances more effective adsorbents than their crystalline forms? Tanning –  Animal hides are colloidal in nature. The process is known as steam reforming. This process is termed as tanning. ... NCERT Solutions for Class 12 Chemistry. Flocculation follows, which mixes the water with large paddles so that coagulated particles can be brought together into larger clumps (or “floc”) that slowly settle on… Rajasthan Board RBSE Class 12 Chemistry Chapter 5 Surface Chemistry RBSE Class 12 Chemistry Chapter 5 Test Book Type Questions RBSE Class 12 Chemistry Chapter 5 Multiple Choice Questions Question 1. Rubber is obtained by coagulation of latex. Class 12 Chemistry Surface Chemistry Brownian Movement Brownian movement may be defined as continuous zigzag movement of the colloidal particles in a colloidal solution. Question 12. Negative charges are found […] Coagulation process of latex: The milky fluid obtained from tapped rubber trees is called latex. (c) adsorption produces heat which increases the … Latest chapter wise notes for CBSE board exams. The formation of a clot is often referred to as secondary hemostasis, because it forms the second stage in the process of arresting the loss of blood from a ruptured vessel. LEARNING APP; ANSWR; CODR; XPLOR; SCHOOL OS; answr. Why is it necessary to remove CO when ammonia is obtained by Haber’s process? 232, Block C-3, Janakpuri, New Delhi, In humans, factor XII is encoded by the F12 gene. 1. What is the role of desorption in the process of catalysis? Define: Tyndall Effect. Coagulation, in physiology, the process by which a blood clot is formed. It consists of an aqueous suspension of colloidal rubber particles. NCERT Solutions for Class 11 Physics. Coagulation of lyophobic sols can be carried out by (i) Electrophoresis: The colloidal particles get attracted towards oppositely charged electrodes, get discharged and coagulated. This document is highly rated by Biotechnology Engineering (BT) students and has been viewed 1094 times. CHEMISTRY CLASS-- XII CHAPTER ... Q.5 The coagulation of 100 mL of colloidal sol. was last updated on 22nd December 2020. NCERT Exemplar Class 12 Chemistry is very important resource for students preparing for XII Board Examination. Other articles where Coagulation is discussed: water purification: Other purification steps: That process includes coagulation, a step in which chemicals are added that cause small particles suspended in the water to clump together. (Blood vessel constriction and platelet aggregation is … Coagulation is caused by (i) Electrophoresis, (ii) Mutual precipitation by mixing oppositely charged sols in proper proportion. ... Coagulation: The process of settling down of … The particles on coming in contact with these plates lose their charge and get precipitated. Answer: Coagulation: The process of converting a colloidal solution into precipitate is called coagulation. These questions are based on the latest CBSE Class 12 Chemistry Syllabus. By electrophoresis: In this method, the colloidal particles are forced to move towards the oppositely charged particles, and then they are discharged and collected at the bottom. The blood clotting process occurs with the use of platelets and fibrin. What is the ‘coagulation’ process? Rubber industry-  Latex is a colloidal solution of rubber particles which are negatively charged. [AJ2017] Answer/Explanation. 12th. Which acid is used for coagulating rubber from latex? Coagulation- It is process of settling of colloidal particles. Rajasthan Board RBSE Class 12 Chemistry Chapter 5 Surface Chemistry RBSE Class 12 Chemistry Chapter 5 Test Book Type Questions RBSE Class 12 Chemistry Chapter 5 Multiple Choice Questions Question 1. Electro precipitation of smoke – The smoke is led through a chamber containing plates having a charged opposite to that carried by smoke particles. Nov 09, 2020 - Coagulation - PowerPoint Presentation, chemistry, class 12, CBSE Biotechnology Engineering (BT) Notes | EduRev is made by best teachers of Biotechnology Engineering (BT). The blood clotting process results in homeostasis and leads to repair of damaged blood vessels after cessation of blood loss. The process of coagulation can be carried out in the following ways: 1. Peptization. The coagulation of the lyophobic sols can be carried out by following methods. Each rubber particle is made up of rubber polymers covered by a layer of protein membrane. Chemistry. Join Now. is completely prevented by adding 0.25g of a protective colloid ‘A’ to it before adding 1 mL of NaCl solution. What is the coagulating power of an electrolyte? (Blood vessel constriction and platelet aggregation is the first stage.) Coagulation is generally brought about by the addition of electrolyte. The coagulation process in chemistry can be explained by taking an example of drinking water treatment, which is provided in a brief way below. Why is the ester hydrolysis slow in the beginning and becomes faster after sometime? Answer: Blood coagulation or clotting is a process by which the blood transforms from a liquid to a gel-like substance and forms a blood clot. CO when ammonia is obtained by Haber’s process? What is the cause of coagulation? Hardy – Schulze rules: i) … ... Coagulation or precipitation: The process of settling of colloidal particles as precipitate is called coagulation. Surface Chemistry. In Haber's process, hydrogen is obtained by reacting methane with steam in presence of NiO as catalyst. It can also be called as precipitation. Question from very important topics are covered by NCERT Exemplar Class 12.You also get idea about the type of questions and method to answer in your class 12th … Answer: Blood coagulation or clotting is a process by which the blood transforms from a liquid to a gel-like substance and forms a blood clot. Coagulation process of latex: The milky fluid obtained from tapped rubber trees is called latex. ... Coagulation. The coagulation-flocculation process can be used as a … CBSE > Class 12 > Chemistry 1 answers; Yogita Ingle 4 hours ago. Determine the gold number ... Q.10 How the ore is concentrated by froth floatation process? Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 12.. © Surface Chemistry class 12 Notes Chemistry chapter 5 in PDF format for free download. If they clump together and form larger particles, then it would be … Coagulation is a process of aggregating together the colloidal particles into large sized particles to form their precipitate while peptization is a process of converting fresh precipitate into colloidal particles by shaking it with the dispersion medium in the presence of a small amount of a suitable electrolyte. Chemistry Explorers - For Cbse board exams 23,916 views. Answer: Explaination: The conversion of a colloidal solution into precipitate is called coagulation. Eg- Argyrol is a silver sol used as an eye lotion, milk of magnesia is used to cure stomach disorders. Discuss the effect of pressure and temperature on the adsorption of gases. Class 12 Chemistry Surface Chemistry: Applications of Colloids: ... mutual coagulation takes place. Each rubber particle is made up of rubber polymers covered by a layer of protein membrane. The formation of a clot is often referred to as secondary hemostasis, because it forms the second stage in the process of arresting the loss of blood from a ruptured vessel. In Freundlich adsorption isotherm x/m = Kp 1/n, the value of ‘n’ at low pressure is ... in the process of adsoption, the activation energy of the molecules becomes large. Answer:Coagulating power of an electrolyte is the minimum amount of electrolyte in millimoles that must be added to one litre of a colloidal solution to bring about its coagulation. The coagulation of the lyophobic sols can be carried out by following methods. ... Desorption: It is the process of removing an adsorbed substance from a surface on which it is adsorbed. Coagulation or Flocculation or Precipitation “The phenomenon of the precipitation of a colloidal solution by the addition of the excess of an electrolyte is called coagulation or flocculation.”. 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