Electroplating

Q.

What is electroplating?

1. It is the process of depositing a layer of electrons on any metal electrically.

2. It is the process of depositing a layer of electrons on any non-metal electrically.

3. It is the process of depositing a layer of any desired metal on another material by means of electricity.

4. It is the process of depositing a layer of any desired non-metal on any material.

Q. The flow of charged particles is called _________.

1. electric current
2. electric circuit
3. circuit
4. water current

Q.

Sandeep wants to coat his wooden pencil with some metal to give it a shiny look. Which of the following method can he use?

1. Electroplating using metal plate as the positive electrode and pencil as negative.

2. Electroplating using metal plate as the negative electrode and pencil as positive.

3. Electroplating using metal plate as one of the electrodes and pencil as other.

4. Cannot be done as wood is a non conducting material.

Q. An electric current is passed through a conducting solution. Which of the following observations is/are correct?
एक चालक विलयन में विद्युत धारा गुजारी जाती है। निम्नलिखित में से कौनसा/कौनसे प्रेक्षण सही है/हैं?

(i) Deposition of metal may be seen on electrode
(i) धातु का निक्षेपण इलेक्ट्रॉड पर देखा जा सकता है

(ii) Colour of solution may get changed
(ii) विलयन का रंग परिवर्तित हो सकता है

(iii) Bubbles of gas may be formed on the electrodes
(iii) गैस के बुलबुले इलेक्ट्रॉडों पर निर्मित हो सकते हैं

1. Only (i)
   केवल (i)
2. Only (i) and (iii)
   केवल (i) तथा (iii)
3. Only (ii) and (iii)
   केवल (ii) तथा (iii)
4. All (i), (ii) and (iii)
   (i), (ii) तथा (iii) सभी

Q. Electric current is due to a continous flow of __________ in an electric circuit.

1. electrons
2. atoms
3. protons
4. neutrons

Q.

If we allow current to pass through the given set up for some time, which of the following can be observed?

1. Copper gets deposited on the electrode connected to the negative terminal of the battery

2. None of these

3. Copper gets deposited on the electrode connected to the positive terminal of the battery

4. Copper gets dissolved into the solution from electrode connected to negative terminal

Q. For electroplating copper on an iron object, which terminal of the battery is connected to the iron object?
(a) Positive
(b) Negative
(c) Both
(d) None of them

Q. Fill in the blanks
(a) The object to be electroplated is taken as ___ electrode.