When 2-bromopentane is heated with alcoholic solution of potassium hydroxide, the major product obtained is

Step-by-step solution

According to Saytzeff rule, in dehydrohalogenation reactions, the preferred product is that alkene which has the greater number of alkyl groups attached to the doubly bonded carbon atoms. Thus, 2 -bromopentane gives pent-2-ene as the major product.