The first step in bakelite formation is
Options
(a) aromatic nucleophilic substitution (b) aromatic electrophilic substitution (c) condensation (d) electrophilic addition
Correct Answer:
aromatic electrophilic substitution
Explanation:
No explanation available. Be the first […]
The polymer used in orthopaedic devices and in controlled drug release is
Options
(a) Orlon (b) PTFE (c) SBR (d) PHBV
Correct Answer:
PHBV
Explanation:
No explanation available. Be the first to write […]
Which of the following is not correct regarding terylene
Options
(a) Step-growth polymer (b) Synthetic fibre (c) Condensation polymer (d) Thermosetting plastic
Correct Answer:
Thermosetting plastic
Explanation:
Terylene is not a thermosetting polymer […]
Which of the following is currently used as a tyre cord
Options
(a) Terylene (b) Polyethylene (c) Polypropylene (d) Nylon-6,6
Correct Answer:
Nylon-6,6
Explanation:
No explanation available. Be the first to write the […]
Three dimensional molecules with cross links are formed in the case of a
Options
(a) thermoplastic (b) thermosetting plastic (c) both (d) none
Correct Answer:
thermosetting plastic
Explanation:
Thermosetting plastic have three dimensional cross-linked […]
The catalyst used in Ziegler process for polythylene manufacture
Options
(a) consists of aluminium chloride and titanium dioxide (b) is vanadium pentoxide (c) consists of aluminium triethyl and titanium tetrachloride (d) is finely […]
Dimethyl terephthalate and ethylene glycol react to form
Options
(a) neoprene (b) nylon-66 (c) decron (d) nylon-6
Correct Answer:
decron
Explanation:
Dacron (terylene) is obtained by the reaction of dimethyl terephthalate with ethylene […]
The monomer unit of polyvinyl chloride has the formula
Options
(a) CH₃ – CH₂Cl (b) CH₂ = CH₂ (c) CHCl = CHCl (d) CH₂ = CHCl
Correct Answer:
CH₂ = CHCl
Explanation:
The […]
The common acid used in the manufacture of rayon and plastics is
Options
(a) methanoic acid (b) ethanoic acid (c) propanoic acid (d) butanoic acid
Correct Answer:
ethanoic acid
Explanation:
No explanation available. […]
Bakelite is prepared by the reaction between
Options
(a) phenol and formaldehyde (b) ethylene glycol and dimethyl terephthalate (c) urea and formaldehyde (d) tetramethylene glycol and hexamethylene di-isocyanate
Correct Answer:
phenol and formaldehyde
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