Applications of Electroplating
Trending Questions
With the help of a labelled diagram, describe briefly how an iron key can be electroplated with copper.
Why is chromium plating done on many objects such as car parts, bath taps etc.? Why is steel not preferred as a car part or a bath tap? [ 3 MARKS ]
Which metal is electroplated on iron for making 'cans' used for storing food?
Paheli wants to deposit silver on an iron spoon. She took silver nitrate (AgNO3) solution in a beaker and set up a simple circuit for electroplating. Which terminal of the battery should the spoon be connected to? What material should the other electrode be made of?
Question 11
Prepare a list of objects around you, that are electroplated.
One of the following is not used for electroplating metal articles. This one is :
(a) nickel
(b) chromium
(c) sodium
(d) silver
Why does a brand new bicycle have shining handlebar and wheel rims? What will happen if these are accidentally scratched?
Give a reason for the following
The blue color of aqueous copper sulfate solution fades when it is electrolysed using platinum electrodes
Chromium has a shiny appearance and it does not corrode. Then why only a thin coating of it is used instead of using it to make the complete material?
Because it is difficult to mould it to desired shape.
Because it reacts during manufacture.
Because it is not economical.
Because it has low melting point.
Impure water is …… ( good / bad ) conductor of electricity.
What are the major problems that the electroplating factories are faced with? [3 marks]
In order to obtain a coating of silver metal on a flower vase made of copper, the electrolyte has to be :
(a) silver nitrate solution
(b) copper nitrate solution
(c) sodium nitrate solution
(d) copper sulphate solution
What is different between current flowing through liquid and current flowing through solids.
- Iron chloride
- Iron sulphate
- Copper sulphate
- Sodium chloride
Which of the following metals should be electroplated on a tiffin box made of steel ?
(a) copper
(b) chromium
(c) silver
(d) tin
Tin cans, used for storing food, are made by electroplating tin onto iron. This is done because
Tin reacts with food and food is protected from getting spoilt
Food does not get spoilt as it does not come in contact with iron which is more reactive.
Tin is more reactive than iron and it acts as a preservative
Iron reacts with tin to form a stable compound.
- Tin is economical.
- Tin is a shinny metal.
- Tin is less reactive.
- Tin is more reactive.
Which of the following objects should not be chrome-plated ?
(a) car bumper
(b) gas stove
(c) frying pan
(d) bicycle bell
The object to be electroplated is made
cathode
anode
electrolyte
aqueous solution
Which of the following liquid are bad conductor of electricity - sugar solution, salt solution, tap water, distilled water and copper sulphate solution? Why?
Which of the following can be electroplated with chromium ?
A. Bakelite
B. Graphite
C. Steel
D. Teflon
(a) A and B
(b) B and C
(c) only C
(d) B and D
Can carbon rod be electroplated with carbon using carbonic acid as an electrolyte?
Why is it necessary to take care of the machines? Give some ways to maintain the machines.
- Make objects appear shiny
- Prevent corrosion
- Keep food intact in metal cans
- To neutralise the charges on the surface
Question 5
Which one of the following solutions will not conduct electricity?
(a) Lemon juice
(b) Vinegar
(c) Tap water
(d) Vegetable oil
Why is it important to take care of machines? Mention some of the methods used to take care of machines?
_________ is a bluish-white metal used to make dry cells and electrodes.
Name two metals which are usually electroplated on cheaper metals for making jewellery (or ornaments).
