Molecular weight of polymers are in the range of__________________?
Molecular weight of polymers are in the range of__________________?
A. 10 to 103
B. 102-107
C. 107-109
D. 109-1011
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Condensation polymerisation of __________ produces bakelite.
Question: Condensation polymerisation of __________ produces bakelite.
[A].propylene [B].
phenol & formaldehyde [C].
phenol & acetaldehyde [D].
urea & formaldehyde Answer: Option B
Explanation:
No answer description available for this question.
Phosphates (e.g., tricresyl, tributyl, tetrabutyl, triphenyl etc.) are added to polymers to act as __________________?
Phosphates (e.g., tricresyl, tributyl, tetrabutyl, triphenyl etc.) are added to polymers to act as __________________?A. Hardeners
B. Anti-shrinkage agents
C. Plasticisers
D. Transparency improverThermosetting materials_________________?
Thermosetting materials_________________?A. Are cross-linked molecules
B. Soften on application of heat
C. Are solvent soluble
D. None of theseA copolymer is formed by the combination of two or more monomer molecules
Question: A copolymer is formed by the combination of two or more monomer molecules
[A].in a chain without the elimination of water. [B].
with the elimination of small amount of water. [C].
of the same monomer by elimination of small molecules of water. [D].
none of these. Answer: Option A
Explanation:
No answer description available for this question.
_____________ tubes are good substitute for human blood vessels on heart by-pass operation?
_____________ tubes are good substitute for human blood vessels on heart by-pass operation?A. PVC
B. Polythene
C. Teflon/Dacron
D. PolystyreneProperties of a polymer is affected by the
Question: Properties of a polymer is affected by the
[A].chain length. [B].
intermolecular forces. [C].
branching & cross-linking. [D].
all (a), (b). Answer: Option D
Explanation:
No answer description available for this question.