Chemical Effects of Electric Current Quiz

What is the chemical effect of electric current?

• Increase in temperature

• Change in color

• Formation of sound waves

• Formation of new substances

Explain the process of electrolysis.

• Electrolysis is the process of using a magnetic field to drive a chemical reaction.

• Electrolysis is the process of using heat to drive a spontaneous chemical reaction.

• Electrolysis is the process of using an electric current to drive a non-spontaneous chemical reaction.

• Electrolysis is the process of using sound waves to drive a non-spontaneous chemical reaction.

What is electroplating? Provide an example.

• Example: Electroplating of diamonds onto a wooden spoon.

• Example: Electroplating of silver onto a copper spoon.

• Example: Electroplating of platinum onto a paper spoon.

• Example: Electroplating of gold onto a plastic spoon.

How does electric current affect substances like water and copper sulphate?

• It causes freezing of water and evaporation of copper sulphate.

• It causes boiling of water and dissolution of copper sulphate.

• It causes electrolysis in water and deposition of copper metal in copper sulphate.

• It causes combustion of water and sublimation of copper sulphate.

Name two factors that affect the chemical effects of electric current.

• Color of the electrodes and color of the electrolyte

• Temperature and pressure

• Nature of the electrodes and nature of the electrolyte

• Size of the electrodes and size of the electrolyte

Explain the concept of electroplating with the help of an example.

• Electroplating is the process of creating a metal object using a 3D printer.

• Electroplating involves the use of heat to change the color of a metal object.

• One example of electroplating is the process of coating a metal object with a thin layer of gold to give it a shiny and decorative finish.

• Electroplating is the process of coating a metal object with a thin layer of plastic for protection.

How does electric current affect the chemical composition of a substance?

• It can change the color of the substance

• It can cause chemical reactions to occur, leading to changes in the substance's chemical composition.

• It has no effect on the chemical composition

• It can make the substance taste sweeter

What are the factors that influence the chemical effects of electric current?

• Color of the wires, length of the wires, material of the wires

• Nature of the electrodes, nature of the electrolyte, concentration of the electrolyte, and current flowing through the circuit

• Temperature of the room, time of day, humidity in the air

• Voltage of the battery, size of the battery, shape of the battery

Give an example of a substance that undergoes a chemical change due to the effect of electric current.

• Water

• Salt

• Sugar

• Oxygen

Which of the following is a good conductor.

• nylon

• wood

• copper

• none