Q. Pick out the wrong statement.

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Q. Which of the following rubbers has the widest service temperature range (-75 to 275°C) ?

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Q. Nylon-66 compared to nylon-6 has

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Q. Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.

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Q. Which of the following is generally not drawn into fibre ?

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Q. Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6.

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Q. Which of the following is not a natural polymer ?

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Q. In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the __________ fibres.

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Q. Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.

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Q. Which of the following is not the commercial name of polymethylmethacrylate (PMMA) ?

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

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Q. In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is

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Q. Gutta parcha rubber is

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Q. The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is

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Q. Synthetic rubber

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Q. Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the

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Q. In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer ?

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Q. Cation exchange resins used in water treatment is made from __________ resin.

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Q. Size range of polymer molecules varies from __________ metre.

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Q. Cellulose content in bomboo fibre is about __________ percent.

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