Choosing only words from the following list, write down the appropriate words to fill in the blanks (a) to (e).
(anions, anode, cathode, cations, electrode, electrolyte, nickel, voltameter)
Electroplating an article with Nickel requires an (a) ______ a solution which must be containing (b) _ ions. The article to be plated is placed as the (c) of the cell in which the plating is carried out. The (d) of the cell is made from pure nickel. The ions which are attracted to the negative electrode and discharged are called (e) ____________.

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Solution

a) An electrolyte is required to carry out an electrolysis process because it helps to conduct electricity for the movement of its free ions.
b) The solution must contain Nickel ions because it will improve the conductivity of the electrolyte.
c) The impure article to be electrolysed is placed at the cathode.
d) The pure metal gets deposited at the anode.
e) Cations are positive ions, so that they will get attracted by the negative ions present at the negative electrode.

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In the process of purification of copper metal, a thin plate of pure copper and a thick rod of impure copper are used as electrodes, and a metal salt solution is used as an electrolyte :
(a) Which electrode is connected to the positive terminal of the battery ?
(b) Which electrode is connected to the negative terminal of the battery ?
(c) Which metal salt solution is taken as electrolyte ?

Choosing only words from the following list write down the appropriate words to fill in the blanks below (anions, anode, cathode, cationa, electrode, electrolyte, nickel, voltameter)

To electroplate an article with nickel requires an:

The ________ of the cell is made from pure nickel.

Q. Give reasons:
a)The surface of the article to be electroplated should be free from non-metallic impurities.
b) A low current and for a longer time should be used during electroplating.
c) A direct current and not an a.c current should be used during electroplating.
d) The metal anode has to be replaced periodically during electroplating.
e) Silver nitrate is not preferred as an electrolyte during electroplating of an iron spoon with silver.
f) The article to be plated is always placed at the cathode.

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