Wood charcoal is used for decolouration of sugar, because it _______________ the coloured materials?
(A) Adsorbs
(B) Oxidises
(C) Reduces
(D) Converts
Massecuite is a terminology used in the ______________ industry ?
(A) Paint
(B) Oil hydrogenation
(C) Soap
(D) Sugar
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
Co-efficient of thermal expansion of glass is decreased by the addition of _______________ during its manufacture?
(A) CaO
(B) MnO2
(C) ZnO
(D) FeS
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
90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at _____________ °C ?
(A) < 0
(B) 10-30
(C) 250-280
(D) 500-600
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