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MCQs

Total Questions : 1113 | Page 15 of 112 pages
Question 141. Rayon is superior to cotton in making gauge for wound treatment, because rayon
  1.    Is a synthetic polymer
  2.    Does not stick to the wound unlike cotton
  3.    Can absorb over 90% of its own weight of water
  4.    Both B & C
 Discuss Question
Answer: Option B. -> Does not stick to the wound unlike cotton
Question 142. Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is
  1.    Nylon-66
  2.    Teflon
  3.    Polyester
  4.    Bakelite
 Discuss Question
Answer: Option B. -> Teflon
Question 143. Plastic tubes & pipes are generally made by __________ moulding.
  1.    Injection
  2.    Transfer
  3.    Extrusion
  4.    Compression
 Discuss Question
Answer: Option C. -> Extrusion
Question 144. Polypropylene compared to polythene is
  1.    Harder
  2.    Stronger
  3.    Lighter
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 145. Acrilan fibres used for making cloth, carpet & blankets, which is a hard, horny & high melting polymeric material is nothing but
  1.    Polyacrylonitrile
  2.    Polyamide
  3.    Saturated polyester
  4.    Alkyd resin
 Discuss Question
Answer: Option A. -> Polyacrylonitrile
Question 146. Softening point of high density polythene is about __________ °C.
  1.    85
  2.    135
  3.    165
  4.    205
 Discuss Question
Answer: Option B. -> 135
Question 147. Pick out the wrong statement.
  1.    Polystyrene is a thermoplastic polymer
  2.    Protein is a natural polymer
  3.    Neoprene is a natural rubber
  4.    Polythene is a copolymer, while SBR is a homopolymer
 Discuss Question
Answer: Option C. -> Neoprene is a natural rubber
Question 148. β - glucose is the monomer of
  1.    Cellulose
  2.    Starch
  3.    Protein
  4.    None of these
 Discuss Question
Answer: Option A. -> Cellulose
Question 149. Zeigler process
  1.    Produces high density polythene
  2.    Uses no catalyst
  3.    Produces low density polythene
  4.    Employs very high pressure
 Discuss Question
Answer: Option A. -> Produces high density polythene
Question 150. Condensation polymerisation of __________ produces bakelite.
  1.    Propylene
  2.    Phenol & formaldehyde
  3.    Phenol & acetaldehyde
  4.    Urea & formaldehyde
 Discuss Question
Answer: Option B. -> Phenol & formaldehyde

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