Chemical Engineering Mcqs

Pick out the true statement pertaining to water treatment ?
  • (A)  Slow sand filters can remove colour completely
  • (B)  Activated carbon can be used for taste & odour control without subsequent filtration
  • (C)  Application of activated carbon reduces the temporary hardness of water
  • (D)  Normally, the turbidity is removed by adding a coagulant prior to sedimentation
Pick out the wrong statement ?
  • (A)  Kraft method of pulp manufacture can process all types of fibrous raw materials
  • (B)  Digestion time for bagasse is less than that for wood base materials
  • (C)  Both temperature and pressure in the digestor is less in case of the sulphite method as compared to that in the sulphate method
  • (D)  None of these
Pick out the wrong statement?
  • (A)  Azoic dyes are mostly applied on cotton fabrics
  • (B)  Basic dyes (e.g. amino derivatives) are applied mostly to paper
  • (C)  Mordant dyes are applied mainly to wools
  • (D)  None of these
Pick out the wrong statement pertaining to the soap manufacture?
  • (A)  Transparent soaps are made by cold process
  • (B)  Organic pigments are used as colouring materials in the soap manufacture
  • (C)  Both laundry as well as toilet soaps are manufactured by hot process
  • (D)  Colourless rosin is used in the manufacture of laundry soaps
Pick out the wrong statement ?
  • (A)  Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%
  • (B)  Contact process of sulphuric acid manufacture produces pure acid of concentration ≥ 98%
  • (C)  75% oleum can be produced by distillation of 20% oleum
  • (D)  Contact process of sulphuric acid manufacture uses nickel as the catalyst