Q-2 Explain the difference on the basis of properties
(1) Thermosetting plastics and thermoplastics.
(2) Physical properties of metals and non metal physical properties.
(3) Useful micro organisms and harmful micro organisms.
Answers
(1) Thermosetting plastics and thermoplastics
thermoplastics:-
1- The synthesis of thermoplastic can happen by a process of addition polymerization.
2- Thermoplastics have low melting points and low tensile strength.
3- Thermoplastic is lower in molecular weight, compared to thermosetting plastic.
Thermosetting plastics:-
1- The synthesis of thermosetting plastics can happen by the process of condensation polymerization.
2- Thermosetting plastics have high melting points and tensile strength.
3- Thermosetting Plastic is high in molecular weight.
(2) Physical properties of metals and non metal physical properties.
Metals:-
1- metals are malleable i,e, they can be beaten into thin sheets with a hammer.
2- metals are ductile i.e. they can be drawn into thin wires.
3- metals are good conductors of heat and electricity.
Non-Metal:-
1- non-metals are non-malleable i.e. they cannot be beaten into thin sheets with a hammer.
2- non-metals are non-ductile i.e. they cannot be drawn into thin wires.
3- non-metals are bad conductors of heat and electricity.
(3) Useful micro organisms and harmful micro organisms.
Useful microorganisms:-
1- Recycles by decomposition.
2- Decomposes dead remains and waste products.
3- In medicine: vaccines, antibiotics, vitamins.
harmful microorganisms:-
1- Can cause diseases in humans animals and plants.
2- Can be used as a carrier of disease.
3- Spoils food.