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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 added to soaps to impart antiseptic properties.
(b) 2-3 per cent solution of iodine in alochol-water mixture is known as tincture of iodine. It is applied on wounds as antiseptic.
(c) Sodium benzoate acts as food preservative.
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