Most commonly used rubber vulcanisation agent is __________________?

A. Sulphur
B. Bromine
C. Platinum
D. Alumina

Thermocol (expanded polystyrene) is not used for __________________?

A. Low temperature thermal insulation as in refrigerator and air conditioners
B. Acoustic control and ceiling for building
C. High temperature thermal insulation in furnaces
D. Packing of delicate electronic gadgets

Which of the following is not a polymer of two monomers ?

A. Teflon
B. Bakelite
C. SBR
D. None of these

Buna-S is also called____________________?

A. Polyurethane
B. SBR
C. Teflon
D. Bakelite