concepts CPI

• Gun powder, an explosive, comprises of charcoal, sulfur and

  saltpeter
• The starting raw material for the manufacture of alum is

  bauxite
• Paper pulp produced by kraft/sulfate process is

  strong & fibrous
• Claude process of gas liquefaction employs

  adiabatic expansion against a piston or in a turbine.
• Viscose rayon is chemically

  regenerated cellulose acetate
• Styrene is produced from ethyl benzene by the process of

  dehydrogenation
• Gelatin which is a nitrogenous organic protein is obtained by the hydrolysis of

  collagen
• Sucrose content in the raw juice extracted

  from sugar cane is about %.


  15 - 20%
• Fusel oil is a/an

  mixture of higher molecular weight alcohols (a by-

  product obtained during production of alcohol from molasses).
• Styrene-butadiene-rubber (SBR) as compared to natural rubber

  • has poorer tensile strength.
  • poorer resistance to oxidation.
  • greater amount of heat build-up under heavy loading.

  all of the above
• Coefficient of thermal expansion of glass is decreased by the addition of___ during its manufacture.

  ZnO
• The catalyst used in the manufacture of DDT (from

  chloral and chlorobenzene) is

  oleum
• Epoxy resin

  is a good adhesive.
• Which of the following is the most adverse factor

  challenging the choice of mercury electrolytic cell

  process for the production of caustic soda

  Pollution of water stream by mercury.
• Esterification reaction produces

  soap
• Wood charcoal is used for decoloration of sugar

  because it___ the colored materials.

  adsorbs
• Producer gas consists mainly of

  CO, CO2, N2, H2
• Neoprene is the trade name of

  polychloroprene
• Sulfur addition in soap is done to

  cure pimples & dandruff.
• Phosphate rock is a raw material for the

  manufacture of

  • phosphoric acid
  • phosphorous
  • superphosphates
• Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

  greater tendency of decomposition at elevated temperature.
• Which of the following is NOT a raw material used

  for the manufacture of ordinary glass?

  Iron oxide
• Zeolite removes both temporary as well as permanent

  hardness of water by precipitating calcium and

  magnesium present in water as insoluble zeolites. Used

  zeolite is regenerated by flushing with the solution of

  sodium chloride
• Pasteurization of milk means

  killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
• Fusion of bauxite and __ produces high

  alumina cement.

  limestone
• __process is used for the manufacture

  of sodium carbonate by ammonia soda process.

  Solvay
• Polycaprolactum is commercially known as

  nylon-6
• Frasch process is for

  mining sulfur
• Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because

  it reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop.
• Which is the main reducing agent during production of iron from iron ore in a blast furnace?

  CO
• The drug used in contraceptives is

  mestranol
• Raw materials used for producing _ _cement does not contain iron oxide.

  white
• In the Lurgi coal gasifier

  large quantity of coal can be processed.
• Neon gas is

  used in color discharge tube.
• Solvent extracted oil

  A.has low free fatty acid content.

  B. is odorless.

  C. has more of unsaturates.

  none
• Which of the following is not required in the manufacture of soda ash by Solvay process ?

  A.Ammonia C. Limestone

  B. Nitric acid D. None of these

  B. Nitric acid
• The purpose of tanning in leather industry is to

  stiffen the leather.
• Kaoline is a/an


  refractory material
• Main constituent of dolomite is MgCO3
• Conversion of CO to CO2 by steam in presence of a catalyst is called

  shift conversion