The rate of corrosion of zinc is atleast 10 times slower than that of steel, thus a thin coating of zinc can protect steel for long time. b. UAE. Description. She has started this educational website with the mindset of spreading Free Education to everyone. 2. Chromium metal is quite expensive and hence it is not economical to make whole object out of chromium. The negatively charged object to be plated is submerged into a solution of positively charged metal ions. Solved Examples for You. 2. Some Uses of Electroplating: Imitation jewelry is made by applying a layer of gold or silver. What are the Uses of Electrolysis Uses of Electrolysis The process of electrolysis has many important industrial applications. Every metal item we purchase, for example, utensils, are very smooth and lustrous. 1)Chromium metal has a shiny appearance and it does not corrode. Filed Under: Chemical effect of electric current, Class 8 Tagged With: chromium plating, copper plating, elecroplating, gold plating, nickel plating, silver plating, tin plating, use of electroplating. Smoothness. 1)Immerse the cleaned copper plate in the copper sulphate solution in the beaker. Chromium plating is done on many objects made of iron metal such as bicycle ,handlebars ,bicycle bell ,wheel rims, bathroom fittings ,LPG stoves ,motorcycle parts, and many, many other objects. A cyanide-copper solution, for example, gave adherent deposits of copper directly on iron and steel. Class 8 Science Chapter 14 Chemical Effects of Electric Current . Plastic wire is. a. Connect the copper plates to the positive terminal of a battery through a switch. For high aspect ratio electroplating the standard procedure has been to use PMMA as a photoresist and synchrotron X-ray exposure for patterning. Applications of Electroplating Class 8 Physics Chemical Effects of Electric Current Artificial jewelry , usually made of less expensive metals is often plated with a thin layer of a precious metal like gold and silver to make it more lustrous, appealing but cheaper. Question 4 Which is the polluting waste generated by electroplating factories? Nickle is used in decorative items, cars, and machinery parts. The positively charged copper ions lose their positive charge on coming in contact with the negatively charged Ion key and from copper atoms.These copper atoms deposit on the iron key to form a thin layer of copper metal all over the surface of iron key.In this way, copper metal in the electrolyte comes out of the solution and forms a thin layer on the iron key. CBSE Science Class 8. The chemical effects of electric current is used in industries or factories for the following purposes: 1) Electroplating metals. Electroplating is the process of depositing a thin film of one metal over another metal by passing electric current through an electrolyte. A cyanide-copper solution is still used for this purpose and also for the initial plating on zinc die castings. By simply posting your questions on Question & Answer Forum, you can have them answered by academic experts. The metal objects are usually electroplated with chromium, nickel, silver ,gold or copper metals. Contact. All Chapter 14 - Chemical Effects of Electric Current Revision Notes to help you to revise complete Syllabus and Score More marks. It is a matter of fact that yes - some metals are way more expensive, rare, … Question 3 Name the metal which is electroplated on car parts such as bumpers and bicycle handle bars? Join discussion; Upgrade; Download EduRev app here for Class 8 preparation. Tin cans are made by electroplating tin on iron. 9. It is widely used in industry for coating metal objects with a thin layer of a different metal. These ornaments have the appearance of silver or gold but they are much less expensive. The process used in electroplating is called electrodeposition. 4.8.3 Cathode Efficiency and Anode Efficiency. The cathode is a strip of pure copper and the anode is an unclean copper lump. NCERT Exemplar Class 8 Science Chapter 14 Chemical Effects of Electric Current. A few practical applications and uses of this process are as follows: 1. The lightning conductor used in building protects the building by : Need … 3. Class-8ICSE Board - Applications of electrolysis: Electroplating - LearnNext offers animated video lessons with neatly explained examples, Study Material, FREE NCERT Solutions, Exercises and Tests. Electroplating is a process that uses electrical current to reduce dissolved metal cations so that they form a coherent metal coating on an electrode 4. Electroplating is used in various commercial appliances. Electroplating on a commercial scale was begun about 1840–41 and was accelerated by the discovery of cyanide solutions for plating silver, gold, copper, and brass. Filed Under: Chemical effect of electric current, Class 8 Tagged With: electroplating by chromium, electroplating by tin, use of electroplating. c. Both of these. Free PDF Download - Best collection of CBSE topper Notes, Important Questions, Sample papers and NCERT Solutions for CBSE Class 8 Science Chemical Effects of Electrical Current. NCERT Solutions for Class 8 Science Chapter 14. Nickel and chromium-coated articles are used in automobiles and household appliances. a. 8. View Answer. Chrome-plating of steel parts on automobiles and motorcycles is a common application of electroplating . This is one of the very common applications of electrolysis. Uses of Electroplating. - 31631792 salmataj646 is waiting for your help. When a metal object is electroplated with chromium, it is called chromium plating, When a metal object is electroplated with tin, it is called tin plating, When a metal object is electroplated with Nickel it is called Nickel plating, When metal object is electroplated with silver it is called silver plating, When a metal object is electroplated with gold it is called gold plating, When a metal object is electroplated with copper it is called copper plating. 3)Switch on the electric current by closing the switch. Chemical Effects of Electric Current - Chapter Wise CBSE Solved Question and Answer Based On NCERT . Offer running on EduRev: Apply code STAYHOME200 to get INR 200 off on our premium plan EduRev Infinity! Other examples of electroplating applications are: Steel parts such as camshafts, crankshafts, and hand tools resists wear better when they are electroplated with chromium. 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