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MCQs

Total Questions : 1113 | Page 9 of 112 pages
Question 81. __________ of SBR is adversely affected, if more quantity of styrene is added to butadiene during its co-polymerisation to produce SBR.
  1.    Percent elongation
  2.    Resilience
  3.    Freezing point
  4.    Strength
 Discuss Question
Answer: Option B. -> Resilience
Question 82. Polymers are
  1.    Micromolecules
  2.    Macromolecules
  3.    Sub-micromolecules
  4.    None of these
 Discuss Question
Answer: Option B. -> Macromolecules
Question 83. Polythene is a/an
  1.    Addition polymerisation product
  2.    Condensation polymerisation product
  3.    Thermosetting material
  4.    None of these
 Discuss Question
Answer: Option A. -> Addition polymerisation product
Question 84. Polyvinyl alcohol is used as a
  1.    Cation/anion exchanger
  2.    Water soluble adhesive
  3.    Textile fibre
  4.    Non-sticky coating on frying pans
 Discuss Question
Answer: Option B. -> Water soluble adhesive
Question 85. Polyvinyl chloride (PVC)
  1.    Is produced by polycondensation reaction
  2.    Uses either emulsion or suspension polymerisation methods
  3.    Can be made thermosetting by adding a plasticiser
  4.    Softening temperature is 200°C
 Discuss Question
Answer: Option B. -> Uses either emulsion or suspension polymerisation methods
Question 86. Glyptal used in the manufacture of paints & lacquers is a __________ polymer.
  1.    Polyamide
  2.    Polystyrene
  3.    Polyester
  4.    Polyacrylonitrile
 Discuss Question
Answer: Option C. -> Polyester
Question 87. Nylon 6, 10 which is used for bristles making is superior to nylon 6, 6 due to its lower water absorption capacity, is a/an
  1.    Polyester
  2.    Polyamide
  3.    Polyisoprene
  4.    Polystyrene
 Discuss Question
Answer: Option B. -> Polyamide
Question 88. __________ polymer is used for making unbreakable crockery.
  1.    Thermoplastic
  2.    Melamine
  3.    Addition
  4.    None of these
 Discuss Question
Answer: Option B. -> Melamine
Question 89. Poly Vinyl chloride (PVC) is a __________ material.
  1.    Thermoplastic
  2.    Thermosetting
  3.    Fibrous
  4.    Chemically active
 Discuss Question
Answer: Option A. -> Thermoplastic
Question 90. Pick out the wrong statement regarding the solubility characteristics of high polymers.
  1.    Greater the degree of cross-linking in the polymer, lesser is its solubility
  2.    Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents
  3.    Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent
  4.    High molecul ar weight polymers on dissolving gives solution of very low viscosity
 Discuss Question
Answer: Option D. -> High molecul ar weight polymers on dissolving gives solution of very low viscosity

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