Which of the following is used in vulcanization rubber?
SF6
CF4
CI2F2
C2F2
Neoprene is
A monomer of rubber
Synthetic rubber
Natural rubber
Vulcanised rubber
Which of the following is a chain growth polymer?
Starch
Nucleic acid
Polystryene
Protein
Which of the following is not a polymer?
RNA
Oxytocin
Cholesterol
Amylose
Natural rubber is not used in making footwear for polar regions because
Natural rubber becomes soft at temperature lower than 10oC
Natural rubber becomes brittle at temperature lower than 10oC.
Natural rubber melts at temperature lower than 10oC.
Natural rubber becomes stronger at temperature lower than 10oC.
Which type of polymer is bakelite?
Addition polymer
Homopolymer
Condensation polymer
Biopolymer
When condensation product of hexamethylenediamine and adipic acid is heated to 553 K (80o) in an atmosphere of nitrogen for about 4-5 h, the product obtained is
Solid polymer of nylon - 66
Liquid polymer of nylon- 66
Gaseous polymer of nylon-66
Liquid polymer of nylon - 6
In elastomers, intermolecular forces are
Nil
weaker
Strong
Very strong
Teflon is a polymer of
Vinyl chloride
Tetrachloro ethylene
Tetrafluro ethylene
Buta - 1,3- diene
Which of the following does not reduce Fehling's solution?
Benzaldehyde
Formic acid
Glucose
Fructose
