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MCQs

Total Questions : 1113 | Page 7 of 112 pages
Question 61. Transistor parts and refrigerator components are normally made of
  1.    Polystyrene
  2.    Polyester
  3.    High density polythene
  4.    Polyurathane
 Discuss Question
Answer: Option A. -> Polystyrene
Question 62. Polyvinyl chloride (PVC) is
  1.    A thermosetting material
  2.    A condensation polymerisation product
  3.    Made by employing emulsion polymerisation
  4.    None of these
 Discuss Question
Answer: Option C. -> Made by employing emulsion polymerisation
Question 63. Ion exchange resins are made of
  1.    Lucite
  2.    Sulphonated bakelite
  3.    Polystyrene
  4.    Teflon
 Discuss Question
Answer: Option B. -> Sulphonated bakelite
Question 64. Which of the following types of polymers has the strongest inter particle forces?
  1.    Elastomers
  2.    Fibres
  3.    Thermoplastics
  4.    Thermosetting polymers
 Discuss Question
Answer: Option D. -> Thermosetting polymers
Question 65. Pick out the wrong statement.
  1.    Denier is defined as weight in gm of 9000 metres length of a fibre, while tex is defined as weight in gm of 1000 metres length of fibre
  2.    Crimp is a measure of the difference between the length of the straightened and unstraightend fibre
  3.    Dacron fibres, acrylic fibres, viscose rayon fibres & cellulose acetate fibres are all prepared by wet spinning
  4.    Nylon fibres have greater water absorption capacity than polyester fibres
 Discuss Question
Answer: Option C. -> Dacron fibres, acrylic fibres, viscose rayon fibres & cellulose acetate fibres are all prepared by wet spinning
Question 66. Orion is
  1.    A copolymer
  2.    A condensation polymer
  3.    Obtained by polymerising vinyl cyanide
  4.    All of the above
 Discuss Question
Answer: Option C. -> Obtained by polymerising vinyl cyanide
Question 67. __________ moulding is used for shaping of thermosetting plastics exclusively.
  1.    Compression
  2.    Injection
  3.    Transfer
  4.    Extrusion
 Discuss Question
Answer: Option C. -> Transfer
Question 68. Which of the following is not a polymer of two monomers?
  1.    Teflon
  2.    Bakelite
  3.    SBR
  4.    None of these
 Discuss Question
Answer: Option A. -> Teflon
Question 69. Catalyst used in the production of high density polythene by low pressure Ziegler process is
  1.    Aluminium triethyl activated with TiCl₄
  2.    Platinum
  3.    Molybdenum
  4.    Nickel
 Discuss Question
Answer: Option A. -> Aluminium triethyl activated with TiCl₄
Question 70. 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
  1.    Terylene
  2.    Polybutadiene
  3.    PVC
  4.    Polypropylene
 Discuss Question
Answer: Option A. -> Terylene

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