Chemical test to distinguish between 2 butanol and 3 pentanol?

One way to distinguish between 2-butanol and 3-pentanol is to perform a Lucas Test. When treated with Lucas reagent (conc. HCl and ZnCl2), 2-butanol will react relatively quickly forming a cloudy solution, while 3-pentanol will show a much slower reaction, indicating a secondary alcohol. This test differentiates between primary and secondary alcohols based on their reactivity with Lucas reagent.