Write the structures of the monomers used for getting the following polymers:
Melamine – formaldehyde polymer
Shyam went to a grocery shop to purchase some food items. The shopkeeper packed all the items in polythene bags and gave them to Shyam. But Shyam refused to accept the polythene bags and asked the shopkeeper to pack the items in paper bags. He informed the shopkeeper about the heavy penalty imposed by the government for using polythene bags. The shopkeeper promised that he would use paper bags in future in place of polythene bags.
Answer the following :
(a) Write the values (at least two) shown by Shyam
(b) Write one structural difference between low-density polythene and high-density polythene.
(c) Why did Shyam refuse to accept the items in polythene bags?
(d) What is a biodegradable polymer ? Give an example
Which of the following statements about low-density polythene is false?
It is a poor conductor of electricity
Its synthesis requires dioxygen or a peroxide initiator as a catalyst.
It is used in the manufacture of buckets, dustbins etc.
It is used in the manufacture of buckets, dustbins etc.
Write the names of monomers used for getting the following polymers:
(i) Bakelite
(ii) Neoprene
The polymer containing strong intermolecular forces e.g. hydrogen bonding is
natural rubber
Teflon
Nylon 6,6
Nylon 6,6
Which polymer is used in the manufacture of paints and lacquers?
Bakelite
Glyptal
Polypropene
Polypropene
The two monomers used in the preparation of dextron are
3-hydroxy butanoic acid and 3-hydroxy pentanoic acid
∈ amino caproic acid and glycine
isobutylene and isoprene
lactic acid and glycolic acid
