Question

Explain the difference on the basis of properties (9)

(1) Thermosetting plastics and thermoplastics.

(2) Physical properties of metals and non metal physical properties.

(3) Useful micro organisms and harmful micro organisms.​

Answer 1

Answer:

(1) Thermosetting Plastic : Plastics which are moulded once can't be softened by heating are known as Thermosetting plastics . Thermoplastics : Plastic which get deformed easily on heating and can be bent are known as Thermoplastics . (2) Physical properties of metals are Ductility , Malleability , Sonorous , high density , good conducter of electricity . Physical properties of Non - metals are poor conducter of heat , poor conducter electricity , low density , Brittle , Dull . (3) Useful Microorganisms are saccharomyces cerevisiae , Aspergillus oryzae . Harmful microorganisms are mycobacterium tuberculosis , streptococcus mutans , salmonella enteric , chlamydlophia pneumonia .

Answer 2

Answer:

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