Describe the following with example in each case:
(i) Preservatives
(ii) Tranquilizers.
(i) Preservatives: The chemical substances which are used to protect food against bacteria, yeast and moulds are called preservatives. The most common preservative used is sodium benzoate C6H5COONa.
(ii) Tranquilizers: Tranquilizers are neurologically active drugs . These medicines act on central nervous system and help in reducing anxiety and relieve tension on the nerves. For example: Valium.
Describe the following with example in each case:
(i) Antioxidants.
(ii) Biodegradable detergents.
Why should aspirin cannot be taken on an empty stomach? What does it contain chemically? Draw its structure.
Define the following and given one example of each:
(i) Anti-histamines
(ii) Disinfectants
(iii) Antacids.
Why is it essential to test the patients for “allergy to penicillin”, before it is administered?
How do antipyretic and analgesic compounds help in cases of common sickness ? Give an example for each.
