Y11/2024CT/CHEM1/EOT

What is electrolysis?

• Chemical decomposition by direct current

• Chemical decomposition by heating

• Chemical synthesis using electricity

• Physical change of a substance

What is an electrolyte?

• A compound that conducts electricity

• A non-conductive compound

• A gas that conducts electricity

• A solid that cannot dissolve

What is the role of electrodes in electrolysis?

• To dissolve the electrolyte

• To create a chemical reaction

• To heat the electrolyte

• To conduct electricity into and out of the electrolyte

What is the anode?

• The negative electrode

• The electrode that does not conduct

• The positive electrode

• The electrode that heats the solution

What occurs at the cathode during electrolysis?

• Reduction

• Evaporation

• Heating

• Oxidation

What is an electrolytic cell?

• A device that generates heat

• An assembly of electrodes in an electrolyte

• A type of battery

• A container for solid compounds

Which ions are present in molten NaCl?

• Na+ and OH-

• Na+ and Cl-

• Na- and Cl+

• H+ and Cl-

What happens to chloride ions at the anode?

• They gain electrons

• They lose electrons

• They remain unchanged

• They form a solid

What ions are produced from water during electrolysis?

• Na+ and OH-

• H+ and OH-

• Na+ and Cl-

• H+ and Cl-

What factors affect the preferential discharge of ions?

• Size of the ions

• Position in the electrochemical series, concentration, and nature of the electrode

• Temperature and pressure

• Color of the solution