০০। 'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of
ক) final rolling out of paper.
খ) cutting of fibres.
গ) hydration of fibres.
ঘ) fibrillation of fibre.
০১। 'Synthesis gas' meant for the synthesis of organic compound is a variable mixture of
ক) N2 & H2
খ) CO2 & H2
গ) CO & H2
ঘ) C & H2
০২। 10% oleum comprises of 10% free
ক) SO2
খ) H2SO3
গ) SO3
ঘ) H2SO4
০৩। 20% oleum means that in 100 kg oleum, there are 20 kg of
ক) SO3 and 80kg of H2SO4.
খ) H2SO4 and 80kg of SO3.
গ) SO3 for each 100 kg of H2SO4.
ঘ) none of these.
০৪। 90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C.
ক) <0
খ) 10-30
গ) 250-280
ঘ) 500-600
০৫। 99.5% purity oxygen is used in
ক) cutting and welding by oxy-acetylene flame.
খ) hospitals for medicinal purposes.
গ) gas masks and artificial breathing apparatus.
ঘ) all (a), (b), and (c).
০৬। A 'unit process' is exemplified by the
ক) distillation
খ) hydrogenation of oils
গ) absorption
ঘ) humidification
০৭। A bio-catalyst produced by living cells which acts independent of the cell is called a/an
ক) substrate
খ) enzyme
গ) nutrient
ঘ) none of these
০৮। A cane sugar factory having sugar production rate of 10 tons/day will produce about __________ tons/day of bagasse (after consumption by the factory for heating etc.).
ক) 1
খ) 10
গ) 25
ঘ) 40
০৯। A mineral is termed as 'ore', if
ক) a metal can be economically extracted from it.
খ) it contains ≥ 40% metal.
গ) the metal present in it is costly.
ঘ) all (a), (b) and (c).
১০। A mixture of chlorine & sodium bromide acts as a/an
ক) insecticides
খ) analgesic drug
গ) fire retardant
ঘ) hydrogenation catalyst
১১। A substance produced by a living organism and capable of anti-microbial activity is called a/an
ক) antibiotic
খ) antiseptic
গ) disinfectant
ঘ) none of these
১২। A unit operation is exemplified by the process of
ক) reduction
খ) desorption
গ) nitration
ঘ) combustion
১৩। Absorption of SO3 in 97% H2SO4 is
ক) exothermic
খ) endothermic
গ) not possible
ঘ) none of these
১৪। Acetone is produced by catalytic dehydrogenation of
ক) phenol
খ) naphthalene
গ) isopropanol
ঘ) ethyl benzene
১৫। Acrylonitrile is mainly used in the __________ industry.
ক) polymer
খ) printing
গ) dyeing
ঘ) photographic
১৬। Addition of calcium oxide to water produces
ক) exothermic heat
খ) hissing sound
গ) slaked lime
ঘ) all (a), (b) & (c)
১৭। Adipic acid is an intermediate in the manufacture of
ক) perspex
খ) nylon-66
গ) polystyrene
ঘ) bakelite
১৮। Air used in aerobic fermentation must be sterilized, otherwise the
ক) recovery of product will be difficult.
খ) contamination of pure culture would result.
গ) uniformity of product cannot be achieved.
ঘ) none of these.
১৯। Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.