Question

why grouping of materials is necessary​

Answer 1

Explanation:

In order to classify the material as per its usage, Sorting Material into groups is necessary.For nondegradable substances, the objects should be sorted into recyclable and nonrecyclable substances, so as to reduce wastage of material

Additionally, different materials can be combined to create a composite material. Materials are often organized into groups based on their physical, chemical and mechanical properties. So classification of materials is very important as it is helpful in recognising different materials and their characteristics.