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| 1. |
Describe an activity that gives an understanding of'electroplating' |
| Answer» <html><body><p>tion:Electroplating is the process of depositing a layer of a metal on a metallic or a nonmetallic electrode by electrolysis in an electrolytic cell.Let us take an iron spoon which is to be electroplated with copper. For this, we take a copper plate and an iron spoon as electrodes and copper sulphate (CuSO 4) is taken as an electrolyte. The electrodes are connected through an external circuit as shown in <a href="https://interviewquestions.tuteehub.com/tag/figure-987693" style="font-weight:bold;" target="_blank" title="Click to know more about FIGURE">FIGURE</a>. On passing <a href="https://interviewquestions.tuteehub.com/tag/current-940804" style="font-weight:bold;" target="_blank" title="Click to know more about CURRENT">CURRENT</a> through the electrolyte, it is decomposed into Cu 2+and (SO 4) 2−ions.As Cu 2+ion is positively charged, it moves towards the negative terminal i.e. iron spoon and <a href="https://interviewquestions.tuteehub.com/tag/gets-1005751" style="font-weight:bold;" target="_blank" title="Click to know more about GETS">GETS</a> deposited on it. Thus, iron spoon gets <a href="https://interviewquestions.tuteehub.com/tag/plated-7704179" style="font-weight:bold;" target="_blank" title="Click to know more about PLATED">PLATED</a> with copper. There is no scarcity of Cu atoms because the copper atoms go into the <a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> from the positive terminal i.e. copper plate. This process called electroplating continues until the iron spoon gets coated with copper.</p></body></html> | |