Polymers  MCQs

MCQs of Polymers

Showing 71 to 80 out of 168 Questions
5 6 7 8 9 10
71.
Mention monomer of natural rubber.
(a) 2-methyl buta-1, 3-diene
(b) 3-methyl -1, 2-diene
(c) 2-methyl -1, 2-diene
(d) 2-methyl -1, 3-diene
Answer:

Option (a)

72.
In natural rubber, the property of elasticity is maintained between _____ temperature.
(a) 273 K - 335 K
(b) 373 K - 415 K
(c) 423 K - 473 K
(d) 173 K - 273 K
Answer:

Option (a)

73.
At what temperature natural rubber becomes brittle ?
(a) Less than 373 K
(b) Higher than 335° K
(c) Less than 273 K
(d) Between 273 to 335 K
Answer:

Option (c)

74.
At temperature higher than 335 K rubber becomes _____ .
(a) brittle
(b) fusible
(c) hard
(d) strong
Answer:

Option (b)

75.
In which solvent does natural rubber dissolve ?
(a) H2O
(b) CH3–O–CH3
(c) HCl
(d) All of the above
Answer:

Option (b)

76.
Water absorbing capacity of natural rubber is _____ .
(a) very less
(b) higher
(c) moderate
(d) zero
Answer:

Option (b)

77.
_____ discovered vulcanization process.
(a) Henry Mosley
(b) J. D. Watson
(c) Charles Goodyear
(d) Robert Charles
Answer:

Option (c)

78.
The process of heating natural rubber with sulphur is called _____ .
(a) Galvanization
(b) Besemerisation
(c) Sulphonation
(d) Vulcanization
Answer:

Option (d)

79.
To increase the rate of vulcanization which additive substance is added ?
(a) CaO
(b) ZnO
(c) SiO2
(d) Fe2O3
Answer:

Option (b)

80.
Rubber obtained after vulcanization process does not consider as _____ .
(a) cross linked polymer
(b) semisynthetic polymer
(c) elastomer
(d) thermosetting polymer
Answer:

Option (d)

Showing 71 to 80 out of 168 Questions
5 6 7 8 9 10