Question

define detergents . for 2 marks

Answer 1

Detergent:
A detergent is a surfactant or a mixture of surfactants with cleaning properties in dilute solutions.

Answer 2

Detergents are often preferred over soap as they are more effective at cleaning and have a wider range of uses. Detergents can be used in hard water also because they react less to  minerals in water and do not leave any residue.