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

Give one example of a substance used as narcotic.

What is tincture of iodine? What is its use?

If water contains dissolved calcium bicarbonate, out of soaps and synthetic detergents which one will you use for cleaning clothes?

What are the main constitutents of dettol?

What are food preservatives?

Why should not medicines be taken without consulting doctors?

Name the sweetening agent used in the preparation of sweet for a diabetic patient.

Explain why sweetener is predicted to become great commercial success.