In the context of chemistry, dehydration is a process in which a substance loses water. Which of the following reactions best illustrates a dehydration reaction?
A) Combining sodium hydroxide with hydrochloric acid to form sodium chloride and water.
B) Heating ethanol to form ethene and water.
C) Dissolving salt in water to form a salt solution.
D) Reacting zinc with hydrochloric acid to produce zinc chloride and hydrogen gas.
