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MCQs

Total Questions : 3103 | Page 4 of 311 pages
Question 31. The main product of high temperature carbonisation of coal is
  1.    Coke
  2.    Ammonia
  3.    Tar
  4.    Phenol
 Discuss Question
Answer: Option A. -> Coke
Question 32. Bakelite is
  1.    Same as poly tetrafluoroethylene (PTFE)
  2.    An inorganic polymer
  3.    Same as thermosetting phenol-formaldehyde
  4.    Not a polymer
 Discuss Question
Answer: Option C. -> Same as thermosetting phenol-formaldehyde
Question 33. Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of
  1.    Carbon
  2.    Arsenic
  3.    Lead
  4.    Sulphur
 Discuss Question
Answer: Option B. -> Arsenic
Question 34. Presence of H₂S in raw water (to be chlorinated) results in the
  1.    Reduced softening capacity of zeolite
  2.    Increased dosage of chlorine to provide a disinfecting residual in the water
  3.    Easy removal of its hardness
  4.    None of these
 Discuss Question
Answer: Option B. -> Increased dosage of chlorine to provide a disinfecting residual in the water
Question 35. The temperature in the calcium carbide furnace is __________ °C.
  1.    200-300
  2.    700-850
  3.    2000-2200
  4.    4000-4500
 Discuss Question
Answer: Option C. -> 2000-2200
Question 36. Bio-degradable detergents
  1.    Can be readily oxidised
  2.    Pose problem in sewerage plant
  3.    Have an isoparaffinic structure
  4.    Should not be used as it spoils the cloth
 Discuss Question
Answer: Option A. -> Can be readily oxidised
Question 37. Bitterns is a/an
  1.    Unsaturated fat
  2.    Starting material for the production of iodine
  3.    By-product of chlor-alkali industry
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 38. Which is the most suitable dye for synthetic fibres?
  1.    Acid dye
  2.    Azoic dye
  3.    Pigment dye
  4.    Mordant dye
 Discuss Question
Answer: Option A. -> Acid dye
Question 39. Blue vitriol is chemically
  1.    Copper sulphate
  2.    Ferrous sulphate
  3.    Copper nitrate
  4.    Aluminium sulphate
 Discuss Question
Answer: Option A. -> Copper sulphate
Question 40. Presence of carbonaceous matter in the sewage
  1.    Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures
  2.    Reduces sulphate ions to sulphides causing obnoxious smell
  3.    Increases the quantity of chlorine used for its purification
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above

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