What are the following substances ? Give one example of each one of them. (3 marks)
(ii) Food preservatives
(iii) Synthetic detergents
(i) Tranquilizers : Tranquilizers are chemical compounds used for the treatment of stress and
mild or even severe mental diseases.
Example : Equanil, meprobamate, veronal.
(ii) Food preservatives : Food preservatives are the compounds which prevent spoilage of food
due to microbial growth.
Example : Sodium benzoate, table salt, vegetable oils etc.
(iii) Synthetic detergents : Synthetic detergents are cleansing agents which have all the pro-
perties of soap but which actually do not contain any soap.
Example : Sodium lauryl sulphate.