Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex ?

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Pick out the wrong statement ?

A. For the manufacture of styrene, the major raw materials are benzene and ethylene B. One important copolymer of styrene is SBR, which is widely used in the manufacture of automobile tyres C. Manufacture of phenol by chloroben-zene-eaustic process involves. The chlorination of benzene, causticisation and hydrolysis D. Phenol manufacture by chlorobenzene-caustic process is competitive … Pick out the wrong statement ?Read More...

Which of the following is not a thermoplastic material ?

A. Epoxy polymer B. PVC C. Polystyrene D. Polythene...

Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of________________?

A. Cold SBR B. Butyl rubber C. Bunai N D. Buna S...

Flexible foam (for mattresses) are usually made of _________________?

A. PVC B. Silicone rubber C. Polyurethanes D. Polyamides...

Adipic acid is an intermediate in the manufacture of _____________________?

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