Name the most common food preserative. Why is it added to food?

With reference to which classification has the statement 'Ranitidine is an antacid' been given. 

Why do we require artificial sweetening agents?

Write the chemical equation for preparing sodium soap from glyceryl oleate and glyceryl palmitate. Structure of these compounds are given below: 

Write the chemical equation for preparing sodium soap from glyceryl oleate and glyceryl palmitate. Structure of these compounds are given below:
 

Following type of non-ionic detergents are present in liquid detergents, emulsifying agents and wetting agents. Label the hydrophilic parts in the molecule. Identify the functional group(s) present in the molecule.

Define the term chemotherapy?

What is drug?

Name the macro-molecules that are chosen as drug targets.

Why should not medicines be taken without consulting doctors?

Name a substance which can be used as an antiseptic as well as disinfectant.