Electrolysis Quiz

What is the technique used to split compounds into their elements?

• Reduction

• Electrolysis

• Combustion

• Oxidation

What is the main difficulty with the electrolysis of aqueous solutions?

• Determining the color of the solution

• Figuring out which ions will go to each electrode

• Calculating the volume of the solution

• Measuring the temperature of the solution

Which ion will be discharged at the negative cathode when electrolyzing an aqueous solution of copper sulfate?

• Copper ions

• Chloride ions

• Sulfate ions

• Hydroxide ions

What will the hydroxide ions form at the positive anode when electrolyzing an aqueous solution of copper sulfate?

• Chlorine gas

• Pure copper

• Hydrogen gas

• Oxygen and water

In an aqueous solution of sodium chloride, which ion will be discharged at the negative cathode?

• Sodium ions

• Chloride ions

• Hydroxide ions

• Hydrogen ions

What will the chloride ions form at the positive anode when electrolyzing an aqueous solution of sodium chloride?

• Oxygen and water

• Chlorine gas

• Pure sodium

• Hydrogen gas

What is the purpose of the wire joining the two electrodes in an electrolysis experiment?

• To determine the color of the solution

• To connect the electrodes to the power supply

• To calculate the volume of the solution

• To measure the temperature of the solution

What determines which ions will react with each electrode in an electrolysis experiment?

• The color of the solution

• The reactivity series

• The volume of the solution

• The temperature of the solution

What is the main requirement for insoluble compounds like metal oxides to undergo electrolysis?

• They need to be in gaseous form

• They need to be at a high temperature

• They need to be in molten liquid form

• They need to be dissolved in water

What is the purpose of passing an electric current through an electrolyte in electrolysis?

• To measure the temperature of the solution

• To determine the volume of the solution

• To split compounds into their elements

• To change the color of the solution