passwella.
Menu

JAMB Chemistry 2010 Question 16

Question 16

Chemistry and Industry

Coffee stains can best be removed by

  1. A.kerosine
  2. B.turpentine
  3. C.a solution of borax in water
  4. D.ammonia solution
Show the answer and explanation

Answer: C (a solution of borax in water)

Explanation

Coffee and tea stains are removed by soaking in a warm solution of borax (sodium tetraborate) in water, which is mildly alkaline and loosens the stain.