Which of the following is a natural polyamide fiber?
Which of the following is a natural polyamide fiber?
A. Wool
B. Silk
C. Cotton
D. None of these
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The organic acid monomer in nylon-66 is __________________?
The organic acid monomer in nylon-66 is __________________?A. Sebacic acid
B. Terephthalic acid
C. Adipic acid
D. Benzoic acidThermosetting materials_________________?
Thermosetting materials_________________?A. Are cross-linked molecules
B. Soften on application of heat
C. Are solvent soluble
D. None of theseAddition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
Question: Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
[A].organic peroxides [B].
sulphuric acid [C].
hydroflouric acid [D].
none of these Answer: Option A
Explanation:
No answer description available for this question.
Synthetic rubber___________________?
Synthetic rubber___________________?A. Deforms, if stretched to double of its original dimension
B. Is brittle at low temperature
C. Is softer at higher temperature
D. Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gasesIn a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer ?
In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer ?A. PTFE
B. Buna-S
C. PMMA
D. PolycaprolactamLiners of bags are usually made of ____________________?
Liners of bags are usually made of ____________________?A. Polythene
B. PVC
C. Polypropylene
D. Polyesters