The method of coating one metal over another by use of electric current is known as electroplating. Copper goes into solution at the anode as it is plated at the cathode. Discuss what happens when an electrolyte is dissolved in water, and then an electric current is passed through it. Chemical Effects of Electric Current Class 8 Extra Questions HOTS. 7. Copper as anode lose electron and form Cu+2 move to electrolyte to form CuSO4. Ans: Tap water will conduct electricity as it has some salts dissolved in it. NCERT Exemplar Class 8 Science Chapter 14 is a free resource which is very helpful while preparing for your upcoming board examination. Can you see small bubbles of gases coming out from the water near the nails? The writing appears on the paper. The electric current will break up tap water into its constituent gases, hydrogen and oxygen. Electrolyte is the solution of soluble salt of metal to be deposited. What is Electroplating and How is it Done? ... Electroplating is the process of coating a thin layer of a metal such as gold, silver, chromium, etc., over another metal. This happens because the when current is passed, the K+ ions are attracted to the metal sheet. Learn the concepts of Class 8 Physics Chemical Effects of Electric Current with Videos and Stories. 4.8.6 Process Monitoring Explain why plastic containers are favoured for storing food. Using electricity, you can coat the metal of one electrode with the metal of the other with an electroplating process, also known as electrochemistry! This makes them look more attractive and also resist corrosion. Electroplating is a process that uses electric current to reduce dissolved metal ions by the use of electrolysis. 2. Give two practical examples from daily life which proves rectilinear propagation of light. (a) Aluminium(b) Iron(c) Sodium(d) PotassiumAnswer:(b). Ans: A substance which conducts electricity in the liquid state or when dissolved in water and breaks up chemically during the process is called an electrolyte. The articles to be plated should be cleaned throughly to remove dust, grease or any deposit on it. Read more about the Applications of Electrolysis for IIT JEE (Main and Advanced) at Vedantu.com. Liquid B is a better conductor than liquid A. Record your observations in Table 14.1. EXPLORE THE MANY BENEFITS THAT ELECTROPLATING CAN PROVIDE FOR YOUR BUSINESS. Decoration of articles by giving them a layer for e.g., silver plating on cutlery. 3. (iii) Food kept in iron cans gets spoilt because of reaction with iron. Class 8 Video | EduRev search giving you solved answers for the same. The term is also used for electrical oxidation of anions on to a solid substrate, as in the formation of silver chloride on silver wire to make silver/silver-chloride electrodes. Conduct copper plating activity. Ans: Take two iron nails. The experimental set-up for electroplating copper on an iron spoon is shown in Fig. This video is highly rated by Class 8 students and has been viewed 903 times. Components are generally soldered onto the PCB to both electrically connect and mechanically fasten them to it. Thus, iron spoon gets plated with copper. Electroplating is the process of depositing a thin film of one metal over another metal by passing electric current through an electrolyte. Take a filter paper soaked in potassium iodide solution to which a pinch of starch is added. This video is highly rated by Class 8 students and has been viewed 903 times. By continuing, I agree that I am at least 13 years old and have read and agree to the. Cu+2 move towards cathode to gain electron and neutralize as cu and form layer over iron. (d) Electroplating of _____ is done on objects like water taps and cycle bell to give them a shiny appearance. A coating of zinc is provided to protect iron from corrosion and rust. The process of depositing a layer of any desired metal on another material by means of electricity is called …………. This is your solution of What is Electroplating and How is it Done? The object (iron spoon) to be electroplated is made cathode (–ve electrode). Liquid A is a better conductor than liquid B. Explain why the following are made of thermosetting plastics. What is Electroplating? 3. Question 1. Give some applications of electroplating. Ans: Mercury is a metal which is liquid at room temperature. of this page. In the process of electroplating the object to be electroplated is used as Cathode and the metal which is used for coating is used as Anode. [2 Marks] SECTION –B 9. However, Fe Ni alloys can be electroplated to form very soft magnetic materials with extensive uses in magnetic and electronic applications at microscale, such as transformers, inductors, and electromagnets. Your email address will not be published. Electroplating. 5. copper plate. Value Points/Expected Answer Marks Distribution Total Marks I.1. The coating prevents iron from rusting. The object (iron spoon) to be electroplated is made cathode (–ve electrode). Lakhmir Singh Science Class 8 Chapter 14 Multiple Choice Questions (MCQs) Question 46. A materials scientist extolls the virtues of electroplating. Ans: Yes, I agree with this statement that copper conducts electricity through electrons, whereas salt solution conducts electricity through ions. Electroplating is done in industries to have an anti-reactive coating on the parts of machines so that they do not react with the raw material, to have an anti-corrosive coating for the machines so that they do not get corroded, and a heat-resistive coating for parts like boilers to … When electric current is passed through the solution, the cations move towards the cathode (negatively-charged electrode) and the anions move towards anode (positively-charged electrode). Hence it is not an electrolyte. Top are very important for perfect preparation. as a point source of light in laser beam torches. (Remember to wash and wipe the ends of tester after testing each liquid). Electrolysis is a process of chemical decomposition produced by passing an electric current through a liquid or solution containing ions. Dec 08, 2020 - Process of Electroplating - Chemical Effects of Current, Science, Class 8 Class 8 Video | EduRev is made by best teachers of Class 8. Explain the process of purification. 6. 3. Ans: Zinc is electroplated on iron to prevent it from rusting. What will be the nature of – (i) plate A (ii) plate B (iii) the solution. Take out the ends of the tester from the lemon juice, dip them in water and then wipe them dry. Draw a circuit diagram showing a dry cell connected to a bulb through a switch. 1. Class 8 Video | EduRev sample questions with examples at the bottom The longer lead (leg) from the LED should be connected to the positive terminal of the battery and the shorter lead to the negative terminal of the battery. Electroplating is a very useful process. 4.8.1 Plating Solution Make-up and Analysis Techniques. Foetus 1 1 2 Pressure 1 1 3 Time Period 1 1 4 Electroplating 1 1 5 Global warming 1 1 II. A general children's introduction to chemistry, focused on the elements, for ages 8–10. How will you show experimentally that an electric current can bring about a chemical change? Explain why the following are made of thermosetting plastics. Testosterone 1 1 8. The process uses an electric current to reduce dissolved metal cations to develop a lean coherent metal coating on the electrode. NCERT Exemplar for Class 8 Science Chapter 14 Chemical Effects of Electric current 20. books of Class 8. In this article we will talk in detail about electroplating with some demonstrations and uses of electroplating. Articles Modern plating. It is important to remind learners that circuit diagrams are just schematics of a circuit. Dec 20, 2020 - What is Electroplating and How is it Done? E. LONG-ANSWER QUESTIONS: Answer in about 60 words. 6 Uterus 1 1 7. Question from very important topics are covered by NCERT Exemplar Class 8.You also get idea about the type of questions and method to answer in your Class 8th examination. Pollutants from electroplating industries are very harmful. To use electrolysis to separate water into hydrogen and oxygen gas 4. In Grade 8, learners will practice drawing electrical circuits using the correct circuit symbols. 14.8. Mercury is a liquid and conducts electricity. (ii) Gold or silver is electroplated on jewellery made out of a cheaper metal to make it look attractive. What is this phenomenon called? The bulb does not glow in … What do you think will happen now? All Living Science Solutions for class Class 8 Science are prepared by experts and are 100% accurate. and ………….. Complete What is Electroplating and How is it Done? Clean them with sand paper. Boojho set up this circuit for purification of copper. briefly explain the process of electroplating? 4.8.2 Current Density, pH, Temperature and Conductivity. What is electroplating? Electroplating. A general children's introduction to chemistry, focused on the elements, for ages 8–10. We should not try to put out a fire in an electrical appliance by pouring water on it. There are also specific types of electroplating such as copper plating, silver plating, and chromium plating. NCERT Exemplar Class 8 Science is very important resource for students preparing for VIII Board Examination. Very Short Answer Questions - Chemical Effects of Electric Current, Short Answer Questions - Chemical Effects of Electric Current, Long Answer Questions - Chemical Effects of Electric Current, Test: Chemical Effects Of Electric Current - 4, Test: Chemical Effects Of Electric Current - 3, RD Sharma Solutions for Class 8 Mathematics. Printable Practice worksheets for Class 1 to Class 12 are available on StudiesToday for free download in pdf format for all students. Class 8 Science Chapter 14 Chemical Effects of Electric Current . Observe the circuit given in Fig. Electroplating is a popular metal finishing and improving process used in a wide range of industries for various applications. Over the years, we have developed and perfected our industrial electroplating processes that make use of various metals and metal alloys to achieve the desired result for our customers. Draw a well labelled diagram for electroplating of copper on iron spoon. The temperature around the electroplating equipment should be optimum. You will also love the ad-free experience on Meritnation’s Living Science Solutions. Class 8 What is Electroplating and How is it Done? Conducting properties of liquid cannot be compared in this manner. 3. Protection of the surface of bases metals which corrode for e.g., iron is plated with chromium. All questions and answers from the Living Science Book of Class 8 Science Chapter 15 are provided here for you for free. What will be the nature of – (i) plate A (ii) plate B (iii) the solution. How will you carry out electroplating of copper in the laboratory? Draw a well labelled diagram for electroplating of copper on iron spoon. In chemistry and manufacturing, electrolysis is a technique that uses direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. To prevent this, iron is electroplated with tin, which is less reactive than iron, to make tin cans. 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