if(k.className == "adPushupAds" && k.getAttribute("data-push") != "1") { 3. As we know that cathode is a negative terminal and anode is a positive terminal. Tester: It is the instrument that can test whether the given substance is conducting (means it conducts electricity) and non conducting (does not conduct electricity). When the liquid between the two ends of the tester allows the electric current to pass, the circuit of the tester becomes complete. A solution that contains oppositely charged ion… Log in. Question: Purification of metals is possible through electrolysis. To check strong currents, we can use tester. is coated over another cheaper metal, either to protect the cheaper metal or to make that metal look attractive. How to check the weak current in a circuit? Your No1 source for Latest Entrance Exams, Admission info, February 9, 2019 by SuccessCDs Team in CBSE Class 8 Science Lessons Explanation, Notes, NCERT Question Answers. Asbestos is a good conductor of electricity. Answer: (d) all of these. Your email address will not be published. Question: What is the actual direction of electric current? Question: Vinegar is a sour liquid. A solution that contains oppositely charged ions conducts electricity. can vinegar conduct electricity and why, i thought vinegar was covalent compound, please keep answering none of them are a best answer, 10 points. To check strong currents, we can use tester. Which of these is plated on the iron to prevent it from chemically reacting with food? Purification of metals can be done by electrorefining, where metals are refined by electrolytic method. To check weak currents, we use LED, that is Light Emitting Diode. Pure water can be made conducting by dissolving salt in it. Question: Chrome plating is very popular in the industry. Answer: Electrons flow from an electron rich body/object to an electron deficit one. Answer: Chrome plated objects have a good lustrous shine and appear attractive. Small amounts of mineral salts are present naturally in water. Then we need to adjust the apparatus by using wires. They are, scratch and corrosion resistant. Also, we need to take care that the wires are completing the circuit which means they should not be cut from the middle or any part as this will not allow the bulb to glow. This indicates that chemical reaction takes place. If bulb glows it means that electric current flows through it and we can said that given substance is good conductor. Then we see that a chemical reaction takes place. parts etc. These two electrodes are placed in a solution. The chemical effect of electric current (or electrolysis) is used in the production of various chemical compounds. Answer: Electrolysis has many applications in our daily life but the most common of all the applications is electroplating. Answer: Purification of metals can be done by electrorefining, where metals are refined by electrolytic method. What is the accelaration of Block A and B? HCl, vinegar, and NaOH should all conduct some current in the order below which reflects the degree to which they are dissociated in solution: NaOH solution HCl solution CH3COOH solution (vinegar is about 5% acetic acid) Assuming there was nothing wrong with the battery, the wire connections or the light bulb, the likely explanation is that the ionization current was too small to heat up the bulb filament enough to make it glow brightly. This means that there is no current passing through it or the given substance is bad conductor. Non-electrolytes are the substances which do not dissociate into ions when current is passed through them. But if the current is too weak, the filament does not get sufficient heat and the bulb does not glow. The chemical reactions take place and as a result various observations can be seen. Electrolyte used in this case is water with little acid. one can test if the given substance is a good or poor conductor? In the process of electroplating, a thin layer of a metal like gold, silver, chromium, tin, nickel, etc. Describe this application. Due to the heating effect of current, the filament of bulb gets heated to a high temperature and it starts glowing. Electrolysis is an application of electroplating. So, for such cases we can utilise LED which is a more sensitive detector of current. The purified metal after electrolysis deposits at the negatively charged electrode i.e. Any liquid with a significant concentration of ions is a conductor.
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