21. Water cannot be used to extinguish fire caused by electric current, because A.It may cause electrocution B.It may cause hydrolysis C.It may cause electrolysis D.It may spoil the wiring
Option A Solution: Using water for putting out electric fires is risky, as the firemen can be electrocuted by the water jet. Water is a good conductor of electricity, and, the electric current flows through the water-jet directly into the hands of the person who is holding the waterhose, resulting in immediate electrocution.
