Choose the appropriate word(s) from the bracket [first, zero, second, Raoult’s law, non-ideal…

Choose the appropriate word(s) from the bracket [first, zero, second, Raoult’s law, non-ideal, addition, substitution, Henry’s law, ideal, +I, more, -I, less, dehydrohalogenation]: The reaction of aqueous $\text{KOH}$ with bromopropane is an example of ____ reaction while the reaction of alcoholic $\text{KOH}$ with the same compound is evidence of ____ reaction.