A3) During the electrolysis of water, what two substances are formed at the interface of the
cathode in an electrolytic cell?
•oxygen
•water
•hydrogen gas
•hydrogen ions
•electricity

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering