(a)Why is bithional added to soap ?
(b)What is tincture of iodine ? Write its one use.
(c)Among the following, which one acts as a food preservative ? Aspartame, Aspirin, Sodium Benzoate, Paracetamol 3mark
(a)To impart antiseptic properties 1mark
(b)2-3% solution of iodine in alcohol – water mixture / iodine dissolved in alcohol , used as an antiseptic/ applied on wounds. (1/2,1/2)mark
(c)Sodium benzoate / Aspartame 1mark