Which of the following has the weakest intermolecular forces ?

A. Polyisoprene
B. Nylon-66
C. Polystyrene
D. Bakelite

Which of the following polymers is used for making a non stick coating on frying pans ?

A. Bakelite
B. Teflon
C. Perspex
D. PVC

The main use of butadiene is____________________?

A. As a plasticiser for unsaturated polyester
B. In the manufacture of synthetic rubber
C. As an anti-skimming agent in paint
D. None of these

Elastomers are__________________?

A. Thermosetting material
B. Exemplified by protein derivatives
C. Having high flexural strength
D. Having very high tensile strength and heat resistance

Which of the following natural bio polymers are formed as a result of polymerisation of amino-acids ?

A. Starch
B. Cellulose
C. Proteins
D. Nucleic acids

Styrene butadiene rubber (SBR) as compared to natural rubber has_______________?

A. Poor tensile strength
B. Poorer resistance
C. Greater amount of heat build up heavy loading
D. All A., B. and C.

Polycaprolactam is also known as _________________?

A. Nylon-66
B. Nylon-6
C. Teflon
D. SBR

Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its__________________?

A. Tensile strength
B. Chemical resistance
C. Flexibility
D. All A., B. & C.

Thermoplastic resins usually____________________?

A. Remain hard as long as they are hot
B. Cannot be reclaimed from waste
C. Permanent setting resins
D. Less brittle than thermosetting resins

The conversion of caprolactam in the above case is about ____________ percent?

A. 25
B. 50
C. 70
D. 90