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MCQs

Total Questions : 3103 | Page 32 of 311 pages
Question 311. Viscose rayon is chemically
  1.    Cellulose nitrate
  2.    Regenerated cellulose nitrate
  3.    Cellulose acetate
  4.    Regenerated cellulose acetate
 Discuss Question
Answer: Option D. -> Regenerated cellulose acetate
Question 312. Vulcanisation of rubber
  1.    Decreases its tensile strength
  2.    Increases its ozone & oxygen reactivity
  3.    Increases its oil & solvent resistance
  4.    Converts its plasticity into elasticity
 Discuss Question
Answer: Option D. -> Converts its plasticity into elasticity
Question 313. The biochemical treatment applied to sewage effluents is a process of
  1.    Dehydration
  2.    Reduction
  3.    Oxidation
  4.    Polymerisation
 Discuss Question
Answer: Option C. -> Oxidation
Question 314. Washing of coal is done to
  1.    Remove the inherent impurities
  2.    Remove the adhering impurities
  3.    Reduce the ash content
  4.    Both B and C
 Discuss Question
Answer: Option D. -> Both B and C
Question 315. Wax is a
  1.    Mixture of glycerides
  2.    Mixture of esters of polyhydric alcohols excepting glycerine
  3.    Liquid at room temperature
  4.    Mixture of glycerides of fatty acids
 Discuss Question
Answer: Option B. -> Mixture of esters of polyhydric alcohols excepting glycerine
Question 316. Molecular weight of plastics ranges from
  1.    5000 to 10000
  2.    20000 to 250000
  3.    500 to 5000
  4.    106 to l09
 Discuss Question
Answer: Option B. -> 20000 to 250000
Question 317. Which is a high grade pulp?
  1.    Rag pulp
  2.    Mechanical pulp
  3.    Sulphate pulp
  4.    Sulphite pulp
 Discuss Question
Answer: Option C. -> Sulphate pulp
Question 318. Higher vicosity index of a lubricating oil denotes
  1.    Less changes in fluidity of oil with temperature
  2.    Substantially high change in fluidity of oil with temperature
  3.    Its unsuitability under varying temperature conditions
  4.    None of these
 Discuss Question
Answer: Option A. -> Less changes in fluidity of oil with temperature
Question 319. Acetone is produced by catalytic dehydrogenation of
  1.    Phenol
  2.    Naphthalene
  3.    Isopropanol
  4.    Ethyl benzene
 Discuss Question
Answer: Option C. -> Isopropanol
Question 320. Highly porous refractory bricks are
  1.    Less susceptible to chemical attack by molten fluxes and gases etc
  2.    Very strong
  3.    Having very high thermal conductivity
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these

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