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 gases
Related Mcqs:
- The synthetic fibres produced from _____________ are known as rayon?
A. Lignin
B. Cellulose
C. Polyamides
D. Ethylene glycol - Synthetic polymer produced by using terephthalic acid and ethylene glycol is _________________?
A. Terylene
B. Nylon-66
C. PVC
D. Polystyrene - Which of the following is generally not used as eord for synthetic rubber tyre casing ?
A. Dacron
B. Nylon
C. Cellulose
D. None of these - Plasticisers are added to synthetic plastics to ________________?
A. Impart flexibility
B. Improve workability during fabrication
C. Develop new improved properties not present in the original resin
D. All A., B. and C. - ____________ polymer is used for making unbreakable crockery?
A. Thermoplastic
B. Melamine
C. Addition
D. None of these - The monomer for the production of neoprene rubber is_________________?
A. Acetylene
B. Chloroprene
C. Isoprene
D. None of these - Non sulphonated hard bakelites are not used for making _______________________?
A. Ion-exchange resins
B. Fountain pen barrels
C. Formica table tops
D. Combs - Starting material for the production of SBR is ____________________?
A. Ethyl alcohol
B. Ethylene
C. Both A. & B.
D. Neither A. nor B. - Pick out the wrong statement ?
A. Addition polymers are generally formed by chain growth polymerisation
B. Condensation polymers are generally formed by step growth polymerisation
C. Teflon is formed by step growth polymerisation
D. Bakelite is formed by step growth polymerisation - Nylon-66 compared to nylon-6 has __________________?
A. Lower melting point
B. More abrasion resistant properties
C. Higher hardness
D. All A., B. and C.
