22855.Which is used in formation of nylon–66?
Sulphur haxafluoride
Adipic acid
Sulphurous acid
Phthalic acid
22856.Which one of the following statements is not true?
Natural rubber has the trans–configuration at every double bond
Buna–S is a copolymer of butadiene and styrene
Natural rubber is a 1, 4–polymer of isoprene
In vulcanization, the formation of sulphur bridges between different chains make rubber harder and stronger.
22857.Which type of polymer is "Cellulose diacetate fibre"?
Natural
Semi–synthetic
Synthetic
None of these
22859.Which of the following polymer is prepared from caprolactam?
Nylon 6, 6
Nylon 6, 10
Nylon 6
Nylon 11
22861.Which property that polyacetylene exhibits is unusual for an organic polymer?
Electrical conductivity
Flexibility
High boiling point
Solubility
22863.Biodegradable polymer which can be produced from glycine and aminocaproic acid is
Nylon 2 – nylon 6
PHBV
Buna – N
Nylon 6, 6
22864.Bakelite is a polymer of
benzaldehyde and phenol
formaldehyde and phenol
formaldehyde and benzyl alcohol
acetaldehyde and phenol
22865.The straight chain polymer is formed by
Hydrolysis of (CH3)2SiCl2 followed by condensation polymerisation
Hydrolysis of (CH3)3SiCl followed by condensation polymerisation
Hydrolysis of CH3SiCl3 followed by condensation polymerisation
Hydrolysis of (CH3)4Si by addition polymerisation