Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2. Which of the following polymers has the maximum film elongation (of the order of 100%) ?

Related Mcqs:

1. Branched chair polymers as compared to linear polymers have _________________?

   A. Higher melting point
   B. Higher tensile strength
   C. Lower density
   D. None of these

2. In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher ___________________?

   A. Densities
   B. Melting point
   C. Tensile strength
   D. Hardness, rigidity & brittleness

3. Branched chain polymers compared to linear polymers have higher ____________________?

   A. Density
   B. Tensile strength
   C. Melting point
   D. Degree of irregularity in atomic packing

4. Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of _______________ percent?

   A. 1-1000
   B. 1000-1500
   C. 1500-2000
   D. 2000-2500

5. Polyvinyl acetate is never used for making_________________?

   A. Moulded articles
   B. Fibres
   C. Adhesives
   D. All A., B. & C.

6. _____________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate?

   A. Fibrous
   B. Leathery
   C. Rubbery
   D. Hard

7. Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser ?

   A. Ethylene glycol
   B. Stearic acid estors
   C. Tricresyl phosphate
   D. Esters of phthalic acid

8. Maximum consumption of polymers is in___________________?

   A. Electrical insulation
   B. Toys making
   C. Coating and films
   D. Packaging

9. Pick out the wrong statement regarding the solubility characteristics of high polymers?

   A. Greater the degree of cross-linking in the polymer, lesser is its solubility
   B. Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents
   C. Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent
   D. High molecular weight polymers on dissolving gives solution of very low viscosity

10. Cellulose content in bamboo fibre is about ______________ percent?

    A. 10
    B. 20
    C. 50
    D. 85