Application of Electrolysis

Q.

Why is tin electroplated on iron to make cans used for storing food?

Q. Explain the electrolysis of copper sulphate solution with the help of a diagram.

Q. A change in colour of an electrolyte on passing electric current through it indicates a chemical change.

1. False
2. True

Q.

Name a substance used almost exclusively for making filaments of electric bulbs.

Q. Which of the following statements is true about the electrolysis of water?

1. Oxygen gas is released at the cathode.
2. Hydrogen gas is released at the anode.
3. Electrolysis of water is not possible as distilled water is a poor conductor of electricity.
4. The volume of hydrogen gas released is double the volume of oxygen gas.

Q. During electrolysis of water, $H^{+}$ ions electrons to form hydrogen gas at the electrode connected to terminal of battery.

1. gain
2. lose
3. positive
4. negative

Q. The formation of bubbles at electrodes during electrolysis is an example of the chemical effect of electrical current.

1. False
2. True

Q. The process of chemical decomposition produced by passing an electric current through a liquid is known as:

1. Electrolysis
2. Electroplating
3. Galvanization
4. Electrochemistry

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

Q. Aqueous $CuS{O}_4$ is a/an solution which is in colour.

1. acidic
2. basic
3. salt
4. blue
5. orange
6. brown

Q.

Choose and give the correct answer from the following : platinum, ${\mathrm{PbBr}}_2$, ${\mathrm{Cl}}_2$, ${\mathrm{O}}_2$, cathode, anode.

During electroplating nickel gets deposited at __________.