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More Questions on This Topic :

Question 1. Density of high density polythene is about __________ gm/c.c.
  1.    1.18
  2.    1.05
  3.    0.95
  4.    0.99
Answer: Option C

Question 2. Density of low density polythene is about __________ gm/c.c.
  1.    0.38
  2.    0.56
  3.    0.81
  4.    0.91
Answer: Option D

Question 3. Neoprene is a
  1.    Monomer
  2.    Synthetic rubber
  3.    Polyester
  4.    None of these
Answer: Option B

Question 4. Antioxidants are added to rubber to protect it from the attack of light, heat & atmospheric ozone. Which of the following is an antioxident used in rubber?
  1.    Carbon
  2.    Alkylated diphenyl amine
  3.    Thiokol
  4.    Magnesium
Answer: Option B

Question 5. Nylon-6 as compared to nylon-66 is
  1.    Harder
  2.    More abrasion resistant
  3.    Having higher melting point
  4.    None of these
Answer: Option D

Question 6. Pick out the wrong statement.
  1.    Linear polymers are formed from bifunctional groups only and are normally thermoplastic
  2.    Cross-linked branched chain polymers are either elastometric or thermosetting
  3.    Branching in case of cross-linked polymers caused by small amount of impurities in bifunctional monomer formulation reduces its solubility and increases the softening point
  4.    Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction
Answer: Option D