Show the products of the E₂ dehydrohalogenation reactions of the following alkyl halides using potassium hydroxide. Also, label the products as major and minor.

What are the products of the potassium hydroxide-catalyzed dehydrohalogenation reactions of the compounds below? If applicable, label the major and minor products.

(i) 3-chloropentane

(ii) 1-chlorobutane

(iii) 2-bromobutane