101. The $$S$$ in buna-$$S$$ refers to
A
sulphur
B
styrene
C
sodium
D
salicylate
Answer :
styrene
102. The mass average molecular mass & number average molecular mass of a polymer are 40,000 and 30,000 respectively. The polydispersity index of polymer will be
A
< 1
B
> 1
C
1
D
0
Answer :
> 1
103. Which of the following is not true about high density polythene?
A
Tough
B
Hard
C
Inert
D
Highly branched
Answer :
Highly branched
104. Which of the following is not a biopolymer ?
A
Proteins
B
Rubber
C
Cellulose
D
RNA
Answer :
Rubber
105. Which is a polymer of three different monomers ?
A
$$ABS$$
B
$$SBR$$
C
$$NBR$$
D
$${\text{Nylon - 2, 6}}$$
Answer :
$$ABS$$
106. Low density polythene $$(LDP)$$ is used in the insulation of electricity carrying wires and manufacture of flexible pipes and squeeze bottles because
A
it is tough, hard and rigid
B
it is chemically inert, tough, flexible and poor conductor of electricity
C
it is very tough, good conductor of electricity and flexible
D
it is chemically inert, very soft, water absorbent and poor conductor of heat
Answer :
it is chemically inert, tough, flexible and poor conductor of electricity
107. The commercial name of polyacrylonitrile is
A
dacron
B
orlon (acrilan)
C
$$PVC$$
D
bakelite
Answer :
orlon (acrilan)
108. Which of the following polymer is biodegradable?
A
B
C
D
Answer :
109. Among cellulose, polyvinyl chloride, nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest is
A
Nylon
B
Polyvinyl chloride
C
Cellulose
D
Natural Rubber
Answer :
Natural Rubber
110. Melamine plastic crockery is a codensation polymer of
A
$$HCHO$$ and melamine
B
$$HCHO$$ and ethylene
C
melamine and ethylene
D
None of these
Answer :
$$HCHO$$ and melamine