Electroplating

Q. The element which is mainly electroplated on car parts to give them a shiny appearance is .

1. gold
2. silver
3. chromium

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 positive terminal of the battery.

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

3. Copper residues settle in the electrolyte.

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

Q.

Rohit has an impure copper plate and wants to purify it by electroplating. Using an electrolytic setup, he can do this by

1. using the impure copper plate as the positive terminal electrode.
2. using impure copper plate as the negative terminal electrode.
3. breaking the impure copper plate into 2 halves and using them as electrodes.
4. simply placing the impure copper plate in the electrolyte.

Q.

The process of depositing a layer of a desired metal on another material by means of electricity is called __.

Q.

Deposition of the metal takes place on which electrode during electroplating?

1. It is deposited at the electrode connected to the positive terminal of battery.

2. It is deposited at the electrode connected to the negative terminal of battery.

3. It is deposited at both the electrodes.

4. It depends on the concentration of the solution.

Q.

Sandeep wants to coat his wooden pencil with some metal to give it a shiny look using electricity. This can be done by

1. electroplating using metal plate as the positive electrode and pencil as the negative.
2. electroplating using metal plate as the negative electrode and pencil as the positive.
3. cannot be done as wood is a non-conducting material.
4. electrorefining using metal plate as one of the electrodes and pencil as other.

Q.

In the given arrangement, if we replace the copper plate connected to the negative terminal of the battery with a carbon rod, which of the following happens?

1. The mass of the copper plate increases.

2. Carbon gets coated on the copper rod.

3. Copper gets coated on the carbon rod.

4. The mass of the carbon rod decreases.

Q.

What is electroplating?

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

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

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 electrons on any metal electrically.

Q. A thin layer of zinc is deposited on a metal to ___________.

1. change its colour
2. prevent corrosion
3. change the shape
4. make the object appear rusty

Q. Assertion(A): The process of deplating is done in-order to recover gold and other valuable metals from the circuits of computers and mobiles.
Reason(R): Deplating is exactly same as the process of electroplating.

1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true but R is not the correct explanation of A
3. A is false but R is true
4. A is true but R is false