Final answer:
The product formed when 2-chlorobutane reacts with dilute NaOH at room temperature is 2-butanol.
Step-by-step explanation:
When 2-chlorobutane reacts with dilute NaOH at room temperature, the product formed is 2-butanol. This reaction is an example of nucleophilic substitution, where the hydroxide ion (OH-) acts as a nucleophile, attacking the carbon atom attached to the chlorine in 2-chlorobutane. The chlorine is replaced by the hydroxyl group, resulting in the formation of 2-butanol.