Thiokol (a polysulphide rubber)
Butyl rubber
Neoprene
Polyurathane rubber
✅ The correct answer is option C.
Chemical Engineering MCQs
Which of the following is an elastomer ?
Thiokol
Phenol formaldehyde
Urea formaldehyde
Polystyrene
✅ The correct answer is option A.
Synthetic polymer produced by using terephthalic acid and ethylene glycol is
terylene
nylon-66
PVC
polyesterene
✅ The correct answer is option A.
Which of the following polymers has the tendency of decomposing before melting ?
Polystyrene
Nylon
PVC
None of these
✅ The correct answer is option C.
Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is
chloroethane
chlorophrene
isoprene
none of these
✅ The correct answer is option B.
Starting material for the production of butadiene in India is
naphthalene
benzol
ethyl alcohol
phthalic anhydride
✅ The correct answer is option C.
Pick out the wrong statement.
Addition polymers are generally formed by chain growth polymerisation.
Condensation polymers are generally formed by step growth polymerisation.
Teflon is formed by step growth polymerisation.
Bakelite is formed by step growth polymerisation.
✅ The correct answer is option C.
Zeigler – Natta catalyst (AlR3 – AlCl3) is used in the polymerisation of
vinyl acetate
vinyl chloride
propylene
styrene
✅ The correct answer is option C.
Which of the following is not a natural fibre?
Silk
Viscose rayon
Wool
Cotton
✅ The correct answer is option B.
Viscose rayon is
cellulose nitrate
regenerated cellulose nitrate
regenerated cellulose acetate
none of these
✅ The correct answer is option D.