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Building Materials

Q1:

Plastic

A is an organic substance

B consists of natural or synthetic binders

C finished products are rigid and stable at normal temperature

D is capable of flow when necessary heat and pressure are applied

E All the above.

ANS:E - All the above.

Plastic is organic mainly, but it may be inorganic also. It depends on the monomeric unit with which it is made by connections. If it is having carbon in main structure then it is simply organic. No doubt in it, but some polymers like silicones, which do not content carbon in it are known as inorganic polymers. But they are less in numbers so majoraly we can say that plastic is a organic substance.
 



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