Polymer Technology Mcqs for Chemical

1.

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

A. Polymers made of only one monomer is called homopolymer

B. Polymers made of more than one monomer is called copolymer or mixed polymer

C. Vulcanised rubber is more elastic than natural rubber

D. The intermolecular forces in thermoplastic polymers are intermediate to that of elastomers & fibres

A. Polystyrene is a thermoplastic polymer

B. Protein is a natural polymer

C. Neoprene is a natural rubber

D. Polythene is a copolymer, while SBR is a homopolymer

A. Denier is defined as weight in gm of 9000 metres length of a fibre, while tex is defined as weight in gm of 1000 metres length of fibre

B. Crimp is a measure of the difference between the length of the straightened and unstraightened fibre

C. Dacron fibres, acrylic fibres, viscose rayon fibres & cellulose acetate fibres are all prepared by wet spinning

D. Nylon fibres have greater water absorption capacity than polyester fibres