What are the following substances ? Give one example of each. (3 marks)
(i) Broad Spectrum antibiotics
(ii) Narcotic analgesics
(iii) Synthetic detergents
(i) Broad spectrum antibiotics : Antibiotics which kill or inhibit a wide range of Gram-positive
and Gram-negative bacteria are said to be board spectrum antibiotics.
Example : Chloroamphenicol.
(ii) Narcotic analgesics : Narcotic analgesics are administered in medicinal doses, relieve pain
and produce sleep.
Example : Morphine and many of its homologues.
(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.