Which of the following is used to make non stick cookware ?
1. PVC
2. Polysterene
3. Polyethylene
4. PTFE
Polyethene, PVC, teflon and neoprene are example of -
1. Homopolymer.
2. Addition hetropolymer.
3. Biodegradable polymer.
4. Copolymer.
Product (E) is "
(1) Nylon 66
(2) Nlyon 6
(3) Styrene
(4) Polystyrene
Acetate rayon is prepared from:
(1) acetic acid
(2) glycerol
(3) starch
(4) cellulose
Rubber is heated with sulfur and the process is known:
1. galvanization
2. vulcanization
3. bessemerization
4. sulphonation
Terylene is a:
(1) Polyamide
(2) Polyester
(3) Polyether
(4) Long chain hydrocarbon
Thermosetting plastics are:
1. Cross-linked polymers
2. Don’t melt or soften on heating
3. Cross-linking is usually developed at the time of moulding where they harden irreversibly
4. All of the above
Which are true for terpolymer?
(1) Contains three monomers
(2) ABS plastic
(3) A polymer of acrylonitrile, butadiene and styrene
(4) All of the above
Which is/are true for elastomers?
1. These are synthetic polymers possessing elasticity
2. These possess very weak intermolecular forces of attractions between polymer chains
3. Vulcanised rubber is an example of elastomer
4. All of the above
If N1, N2, N3,.... are the number of molecules with molecular masses M1, M2, M3..... respectively, then mass average molecular mass is expressed.
1.
2.
3.
4.