(a) Why do diabetic persons require artificial sweetening agents?
(b) Write the name of a food preservative. How does it preserve food?
(c) Give the name and formula of a cationic detergent.

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Solution

(a) Diabetic persons require artificial sweetening agents as these have sweet taste but no food value. They go directly through the human digestive system without being digested.
(b) Salt is a food preservative. It controls the growth of fungus while food storage. It results in difference in concentration of salts between the cell and the food. Due to this, osmosis occurs and a cell (micro-organism) loses water, dies or remains dormant or ceases.
(c) n-hexadecyl trimethyl ammonium chloride (or cetyltrimethyl ammonium chloride) is a cationic detergent.
Its formula is $(C H_{3} - (C H_{2})_{14} - C H_{2} - N (C H_{3})_{3})^{+} C l^{-}$ .

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