Give relevant reasons for the following:
1.The blue colour remains blue during electrolysis of CuSO4 soln. using copper electrodes.
2.During electroplating,the article to be plated is always made the cathode.
3.Potassium is extracted from potassium chloride by electrolysis only.
4.solid sodium chloride does not conduct electricity but in the molten state conducts.
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2. During electrolysis positively charged ions moves towards cathode plate. Thus any object which is to be electroplated is kept in cathode plate over which the positively charged ions stick.
3.Potassium is highly reactive and is placed at the top of activity series of metals. Hence potassium can only be extracted by electrolysis.
4. The solid NaCl has strong electrovalent bond, thus ionising Na + and Cl- is impossible. Whearas in molten state the bonds are broken upto a mark and in solution state water's coavalency break NaCl into Na+and Cl- thus easy to conduct electricity as free ions only help to conduct electricity
3.Potassium is highly reactive and is placed at the top of activity series of metals. Hence potassium can only be extracted by electrolysis.
4. The solid NaCl has strong electrovalent bond, thus ionising Na + and Cl- is impossible. Whearas in molten state the bonds are broken upto a mark and in solution state water's coavalency break NaCl into Na+and Cl- thus easy to conduct electricity as free ions only help to conduct electricity
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