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MCQs

Total Questions : 197 | Page 4 of 20 pages
Question 31. In nylon, after drawing occluded structures become
  1.    ellipsoids
  2.    crystals
  3.    round
  4.    polished
 Discuss Question
Answer: Option A. -> ellipsoids
Answer: (a).ellipsoids
Question 32. In diamond all atoms are combined with valency bonds and in a
  1.    one dimensional network
  2.    2D network
  3.    3D network
  4.    4D network
 Discuss Question
Answer: Option C. -> 3D network
Answer: (c).3D network
Question 33. Material can be gas even if molecules are composed of two or three atoms only when force between individual molecule is
  1.    strong
  2.    weak
  3.    negligible
  4.    variable
 Discuss Question
Answer: Option B. -> weak
Answer: (b).weak
Question 34. Diffraction patterns showing sharp spots in a four-point diagram is a characteristic of
  1.    oriented crystal lattice
  2.    amorphous halo
  3.    non amorphous halo
  4.    both a and b
 Discuss Question
Answer: Option D. -> both a and b
Answer: (d).both a and b
Question 35. For polymers, melting down of crystals and reforming is not possible when crystals have
  1.    become smaller
  2.    become larger
  3.    grown to a certain size
  4.    certain strength
 Discuss Question
Answer: Option C. -> grown to a certain size
Answer: (c).grown to a certain size
Question 36. In a continuous structure, whole material is of
  1.    same degree
  2.    different degree
  3.    constant degree
  4.    variable degree
 Discuss Question
Answer: Option A. -> same degree
Answer: (a).same degree
Question 37. Dimension of crystalline regions, extracted from diffraction data are of order of
  1.    10 nm
  2.    20 nm
  3.    30 nm
  4.    35 nm
 Discuss Question
Answer: Option A. -> 10 nm
Answer: (a).10 nm
Question 38. Shape of fibrils is
  1.    ribbon like
  2.    cylindrical
  3.    both a and b
  4.    oval
 Discuss Question
Answer: Option C. -> both a and b
Answer: (c).both a and b
Question 39. Fine details of packing includes relative extent of
  1.    rotating
  2.    fringing
  3.    folding
  4.    fringing and folding
 Discuss Question
Answer: Option D. -> fringing and folding
Answer: (d).fringing and folding
Question 40. Crystal size depending on processing conditions is limited to a maximum of
  1.    5 nm
  2.    20 nm
  3.    15 nm
  4.    10 nm
 Discuss Question
Answer: Option D. -> 10 nm
Answer: (d).10 nm

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