Question

Match the following .
A. Teflon 1. can be blown up into large foam containing air bubbles
B. Polystyrene 2. easily moulded can be rolled into thin sheets
C. Polythene 3. tougher than polythene,can coated on cloth
D. PVC 4. has high melting point and very low friction

Answer 1

Teflon => high melting point , very lowest friction and non reactive.

polystyrene => very light, can be blow up to her large foam containing air bubble , in this form it is known as styrofoam or thermocol.

polythene => easily moulded, can be rolled into sheet , strong and flexible.

PVC => tougher than polythene , can be coated on a cloth base.

so, A <=> 4 , B <=> 1 , C <=> 2 , D <=> 3

Answer 2

A. Teflon - has high melting point and very low friction

B. Polystyrene - can be blown up into large foam containing air bubbles  

C. Polythene - easily moulded can be rolled into thin sheets  

D. PVC - tougher than polythene, can coated on cloth.  

Explanation:  

• All the given options are different types of structures used in day to day purposes.  

• Teflon has a very high melting point and it can be used in places which uses high temperature also it has low friction and can be used in cooking utensils.  

• Polythene is generally used in carrying bags because they can be melted and it can be rolled into sheets.  

• Polystyrene can be easily moulded into soft form like material containing air Bubbles which can be used.  

• PVC is generally used in the making of pipes since it is harder than polythene.