Electrolysis in Chemistry Quiz

What is electrolysis?

• A process of heating substances to break bonds

• The breakdown of a compound using electricity

• A chemical reaction in a galvanic cell

• The process of dissolving ionic compounds in water

Which of the following is an electrolyte?

• Distilled water

• Sodium chloride solution

• Benzene

• Pure ethanol

During electrolysis, at which electrode does oxidation occur?

• Anode

• Cathode

• Both electrodes

• None of the above

What type of ions move toward the cathode during electrolysis?

• Positive ions (cations)

• Negative ions (anions)

• Neutral molecules

• Protons

Which of the following metals cannot be deposited using aqueous solutions in electrolysis?

• Copper

• Lead

• Sodium

• Silver

What gas is released at the anode during electrolysis of acidified water?

• Oxygen

• Hydrogen

• Nitrogen

• Chlorine

Which of these factors does NOT affect the products of electrolysis?

• Nature of electrolyte

• Type of electrodes

• Concentration of electrolyte

• Mass of electrolyte

What happens at the cathode during electrolysis?

• Electrons are lost (oxidation)

• Electrons are gained (reduction)

• Ions dissolve into the solution

• Hydrogen gas is always released

What is the role of the electrolyte in electrolysis?

• To insulate the electrodes

• To allow the flow of ions

• To produce a spark for current flow

• To prevent chemical reactions

In the electrolysis of molten NaCl, what is formed at the cathode?

• Chlorine gas

• Sodium metal

• Sodium chloride

• Oxygen gas