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MCQs

Total Questions : 197 | Page 7 of 20 pages
Question 61. What is value of periodate oxidation in regenerated cellulose?
  1.    10
  2.    8
  3.    15
  4.    20
 Discuss Question
Answer: Option D. -> 20
Answer: (d).20
Question 62. Percentage accessibility of sulphite pulp measured by exchange of hydroxyl hydrogens for deutrium is
  1.    87
  2.    44
  3.    57
  4.    66
 Discuss Question
Answer: Option C. -> 57
Answer: (c).57
Question 63. Modified fringed micelle structure has at ends of each micelle a mixture of
  1.    fringing and folding
  2.    folding
  3.    fringing
  4.    bonds
 Discuss Question
Answer: Option A. -> fringing and folding
Answer: (a).fringing and folding
Question 64. Polymer that crystallize in lamellar form linked by tie molecules is called as
  1.    cellulose
  2.    nylon
  3.    ethylene
  4.    polyethylene
 Discuss Question
Answer: Option D. -> polyethylene
Answer: (d).polyethylene
Question 65. Value of degree of order ranges to unity for
  1.    crystalline fibre
  2.    non crystalline fibre
  3.    tight fibre
  4.    amorphous fibre
 Discuss Question
Answer: Option A. -> crystalline fibre
Answer: (a).crystalline fibre
Question 66. Chemical crosslinks helps in
  1.    stabilizing the structure
  2.    reduces wrinkles
  3.    reduces creases
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
Answer: (d).all of above
Question 67. In cellulose, groups are joined together via
  1.    covalent bond
  2.    valency bonds
  3.    coordinate bonds
  4.    weak bonds
 Discuss Question
Answer: Option B. -> valency bonds
Answer: (b).valency bonds
Question 68. Chemical treatments are given to replace hydroxyl groups in non crystalline region by other groups in order to change property/properties like
  1.    electrical resistance
  2.    moisture absorption
  3.    rot resistance
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
Answer: (d).all of above
Question 69. Percentage of crystallinity in natural cellulose fibers is
  1.    0.1
  2.    0.4
  3.    1
  4.    0.8
 Discuss Question
Answer: Option C. -> 1
Answer: (c).1
Question 70. Structure of cellulose II is
  1.    analogous
  2.    duplicated
  3.    realtered
  4.    anti parallel
 Discuss Question
Answer: Option D. -> anti parallel
Answer: (d).anti parallel

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