Question

Which of the following articles is made by using only man-made substances?
A.

B.

C.

D.

Answer 1

Hint: A man made material is the one that is manufactured through human effort and artificially made. These materials are usually made using natural, raw materials. Paper, steel, synthetic rubber, polyester are all man-made materials.

Complete step by step answer:
Man –made fibers are made from polymers. There are two types of man-made fibers, i.e. Synthetic fibers and regenerated fibers.
Now, regenerated are those fibers that are made from cellulose polymers that occur naturally in plants such as cotton, wood and flax whereas synthetic fibers are made only from polymers found in natural gas and by-products of petroleum. They include nylon, acrylics, polyurethane and polypropylene.
Now, among the given options glasses are the only man-made substance because they are made up of thermoplastic material. It is a plastic polymer material which becomes soft on heating and hard on cooling. These materials can further be cooled and heated several times without any change in their chemical or mechanical properties.
Whereas, feather hats are made up of natural substance of birds feather, leather shoes are animal skin products which are natural and woolen gloves are made up of animal products which are also natural I.e. all the rest of the options are natural substances.

Hence, option B is correct.

Note: The thermoplastic polymers are used in fabrication of pipes, ropes, belts, insulators and adhesives. They are further used in biomedicines as well. Some of the examples of thermoplastics include polyvinyl chloride, polystyrene, polyethylene, Teflon, etc.