Question

Match the polymers given in column I with their repeating units given in column II.

Column I	Column II
(a) Acrilan	(i)
(b) Polystyrene	(ii)
(c) Neoprene	(iii)
(d) Novolac	(iv)
(e) Buna-N	(v) (vi)

Answer 1

Hint: Polymer defines a very large molecule made up of many small numbers of monomers. Some examples of polymer are polyethene, polyester, etc. Some of the polymers are very important in our day-to-day life.

Complete Step by Step Solution:
Let's understand the given polymers in detail. Acrilan is a polymer which is very hard in nature. Also, it has a very high melting point. It is also known by the name of orlon. When acrylonitrile undergoes additional polymerization, it gives acrylonitrile. Its structure is,

Fig: Acrilan
Therefore, A matches (iv).

Now we will discuss polystyrene. The monomer units that form polystyrene are styrene. Its commercial manufacturing is done from petroleum. Its structure is,

Fig: Polystyrene
Therefore, B matches (i)

Neoprene is a synthetic rubber. The monomer units that form a neoprene are chloroprene. It is formed by the polymerization process. Its structure is,

Fig:Neoprene
Therefore, C matches (ii).

Let’s discuss about novolac. This polymer is synthesised from formaldehyde and phenol. This polymer has a very molecular weight. Its polymer chain is straight. Its structure is,

Fig:Novolac
Therefore, D matches with (v).

Buna-n is a polymer formed from acrylonitrile and 1,3-butadiene. Its structure is,

Fig:Buna-N
Therefore, E matches (iii)
Hence, the complete table is:

Column I	Column II
(a) Acrilan	(iv)
(b) Polystyrene	(i)
(c) Neoprene	(ii)
(d) Novolac	(v)
(e) Buna-N	(iii)

Note: The process of polymer formation from the monomers is termed polymerization process. For example, the polymerization of ethane gives the polymer of polyethene. There are two types, addition and condensation polymerization.