JAMB - Chemistry (2010 - No. 15)
Coffee stains can best be removed by?
Kerosine
turpentine
a solution of borax in water
ammonia solution
คำอธิบาย
Borax solution refers to sodium borax in water. it is used for cleaning purposes. borax is mildly alkaline and can help break down acidic stains, such as those from coffee