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Answer:
Sorry, Bro there are 5 questions and they are so long
Answer:
5. Zinc
6. i) you have answered in the question only
ii)Current
iii)Salts and minerals
iv) electrorefining
7.During electrolysis, the concentration of the electrolyte remains unchanged; the number of electrons extracted at the cathode is equal to the number of electrons supplied at the cathode; Since metal atoms are deposited on the cathode, the mass of the cathode increases and the mass of the anode decreases by an equal amount.
8.The purification of metals by electrolysis. It is commonly applied to copper. A large piece of impure copper is used as the anode with a thin strip of pure copper as the cathode. ... Gold and silver in the impure copper form a so-called anode sludge at the bottom of the cell, which is recovered.
diagram is in the image....
9)The process of coating the surface of a conducting material with a metal. ... Electroplating is usually used to cover a less expensive metal with a more expensive metal, or to cover a corrosive metal with a less corrosive or noncorrosive metal.
It is based on chemical effect of the electric current.
Electroplating is widely used in industry and decorative arts to improve the surface qualities of objects—such as resistance to abrasion and corrosion, lubricity, reflectivity, electrical conductivity, or appearance.
10) No .If we'll add sugar then it'll not conduct electricity, if we'll add salt it'll conduct electricity.
Pure water contains very few ions, so it does not conduct electricity very well. When table salt is dissolved in water, the solution conducts very well, because the solution contains ions. ... When sugar is dissolved in water, the solution does not conduct electricity, because there are no ions in the solution.
