Q. Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent.

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Q. Density of high density polythene is about __________ gm/c.c.

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Q. Vinyl flooring is done using __________ sheets.

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Q. Thiokol is nothing but

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Q. Transistor parts and refrigerator components are normally made of

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Q. Dacron (or terylene) fibres as compared to nylon fibres have

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Q. Starting material for the production of SBR is

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Q. Which of the following is a copolymer ?

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Q. Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its

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Q. The organic acid monomer in nylon 66 is

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Q. Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is

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Q. Nylon-6 is manufactured from

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Q. Caprolactum, a raw material for the manufacture of nylon-6, is produced from

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Q. The monomer of poly vinyl chloride (PVC) is

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Q. Buna-S is also known as

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Q. Neoprene is chemically known as

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Q. The synthetic fibres produced from __________ are known as rayon.

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Q. Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to

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Q. Visco-elastic behaviour exhibited by plastics is a __________ like behaviour.

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Q. Which of the following is generally not used as eord for synthetic rubber tyre casing ?

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