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(a) Why is bithional added to soap ? (...

(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

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(a) Bithional is a disinfectant and used as an antiseptic in medicated soap .
(b) Tincture of iodine is 2-3% solution of iodine in alcohol and water . It is a powerful antiseptic and applied on wounds .
(c) Sodium Benzoate acts as a food preservative .
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