This study investigated the pretreatment of Oil Palm Empty Fruit Bunches (OPEFB) using ionic liquids (ILs) to understand their impact on reducing sugars produced during hydrolysis. The pretreatment of OPEFB was conducted with imidazolium chloride [IM][Cl] ILs at varying weights of 2.5 g, 5 g, 7.5 g, and 10 g, followed by hydrolysis with 2% dilute sulfuric acid. The lignin, cellulose, and hemice…