Question

Fill in the blanks.
(a) Many monomers join together to form a larger unit called
(b) Polyester is made up of small units called
(c) Plastics are
conductors of heat.
(d) Bakelite and melamine are examples of
plastics.
(e)
fibre on burning smells like burning hair.​

Answer 1

Answer:

a) The monomers combine with each other via covalent bonds to form larger molecules known as polymers.

b) Poly+ester

Polyester (Poly+ester) is actually made up of the repeating units of a chemical called an ester.

c) Plastics are poor heat conductors, because they have virtually no free electrons available for conduction mechanisms like metals. The thermal insulating capacity of plastics is rated by measuring the thermal conductivity.

d)Bakelite and melamine are the examples of thermosetting plastics. Plastic is a poor conductor of heat and electricity. Plastic does not react with air and water and with many of the chemicals.

e) Wool is obtained from the fleece of sheep. Hence on burning,woollen fibre smell like the burning hair.