section 1 Flashcards
Oxidation of SO2 to SO3 is favoured by
a. low temperature and low pressure.
b. low temperature and high pressure.
c. high temperature and low pressure.
d. high temperature and high pressure.
b
Gun powder, which is an explosive comprises of
charcoal, sulphur and
a. glycerene
b. salt petre
c. nitro glycerene
d. Dynamite
b
Starting raw material for the manufacture of alum
is
a. alumina
b. gypsum
c. bauxite
d. ammonium bicarbonate
c
Salt cake is chemically represented by
a. Na2SO4
b. CaSO4.H2O
c. MgSO4
d. BaSO4
a
Which of the following sugars is the sweetest?
a. Glucose
b. Fructose
c. Sucrose
d. Lactose
b
Paper pulp produced by kraft/sulphate process is
a. bleached easily
b. dull white in color
c. strong fibrous
d. dark colored
c
Claude process of gas liquefaction employs
a. merely compression of gas beyond its
critical pressure.
b. Joule-Thomson expansion cooling.
c. heat exchange with colder stream.
d. adiabatic expansion against a piston or in a
turbine.
d
The main use of HCl is in the
a. drilling of petroleum wells and pickling of
steel sheets.
b. manufacture of cationic detergent.
c. treatment of spent fuel of nuclear reactor.
d. none of these.
a
The gasification reaction represented by, C +H2O = CO + H2, is a/an __________ reaction.
a. exothermic
b. endothermic
c. catalytic
d. Autocatalytic
b
Viscose rayon is chemically
a. cellulose nitrate
b. regenerated cellulose nitrate
c. cellulose acetate
d. regenerated cellulose acetate
d
All enzymes are made of
a. fats
b. carbohydrates
c. proteins
d. amino acids
c
The combustion reaction, C + O2 = CO2, is
a. exothermic
b. endothermic
c. autocatalytic
d. none of these
a
Styrene is produced from ethyl benzene by the
process of
a. dehydrogenation
b. oxidation
c. alkylation
d. Dehydration
a
Gelatine which is a nitrogenous organic protein
is obtained by the hydrolysis of
a. callagen
b. tannin
c. molasses
d. Carbohydrate
a
The chamber process is
a. preferred over contact process for
producing 98 to 100% H2SO4 and various
oleums.
b. non-catalytic and operates only on pyrites.
c. a batch process for directly producing high
strength (98 to 100%) H2SO4.
d. none of these.
d
Sucrose content in the raw juice extracted from
sugar cane is about __________ percent.
a. 1 - 2
b. 15 - 20
c. 50 - 60
d. 80 - 85
b
- Fuel oil is a/an
a. essential oil.
b. extract from medicinal herbs.
c. mixture of higher molecular weight
alcohols (a by-product obtained during
production of alcohol from molasses).
d. none of these.
c
Styrene-butadiene-rubber (SBR) as compared
to natural rubber has
a. Poorer tensile strength.
b. poorer resistance to oxidation.
c. greater amount of heat build-up under
heavy loading.
d. all (a), (b) and (c).
d
Co-efficient of thermal expansion of glass is
decreased by the addition of __________ during its
manufacture.
a. CaO
b. MnO2
c. ZnO
d. FeS
c
The catalyst used in the manufacture of DDT
(from chloral and chlorobenzene) is
a. dilute H2SO4
b. oleum
c. ultraviolet light
d. none of these
b
Haemoglobin is a/an
a. amino acid
b. biological catalyst
c. protein
d. Enezyme
c
Epoxy resin
a. is a good adhesive.
b. is an elastomer.
c. cannot be used for surface coatings.
d. is a polyester.
a
Concentration of NaOH solution produced by
mercury electrolytic cell is about __________
percent.
a. 10
b. 25
c. 50
d. 98
c
Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?
a. High cost of mercury.
b. High specific gravity of mercury.
c. Non-availability of high purity mercury.
d. Pollution of water stream by mercury.
d
Esterification reaction produces
a. detergent
b. vanaspati
c. soap
d. Mercaptans
c
Wood charcoal is used for decolouration of
sugar, because it __________ the coloured
materials.
a. adsorbs
b. oxidises
c. reduces
d. Converts
a
Producer gas consists mainly of
a. CO, CO2 N2, H2
b. CO, H2
c. H2, CH4
d. C2H2, CO2, H2
a
Neoprene is the trade name of
a. polyurathane
b. phenol formaldehyde
c. polychloroprene
d. styrene-butadiene rubber
c
Hard water
a. does not affect the lather formation by soap.
b. is not unfit for drinking purpose.
c. pollutes the water stream.
d. all (a), (b) and (c).
b
Which of the following is an organo-metal-lic
compound?
a. Isopropyl alcohol
b. Tetra-ethyl lead
c. Zeolite
d. Cumene
b
Sulphur addition in soap is done to
a. improve the soap texture.
b. cure pimples & dandruff.
c. fasten lather formation.
d. increase its cleansing action.
b
Phosphate rock is a raw material for the
manufacture of
a. phosphoric acid
b. phosphorous
c. superphosphates
d. all (a), (b) and (c)
d
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
a. poor oxidation stability and high gum forming tendency.
b. greater tendency of decomposition at elevated temperature.
c. hydrolysis tendency in presence of water.
d. all (a), (b) and (c).
d
Which of the following is not a raw material used for the manufacture of ordinary glass?
a. Iron oxide
b. Soda ash
c. Limestone
d. Silica
a
Esterification reaction
a. produces soap.
b. is reversible.
c. is a reaction between an alcohol and an
organic acid.
d. all (a), (b) and (c).
d
In sulphate pulp manufacture, the pressure and temperature in the digestor is
a. 10 atm., 800 °C
b. 10 atm., 170-180°C
c. 1 atm., 170 - 180°C
d. l atm., 800°C
b
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
a. calcium sulphate
b. sodium chloride
c. sodium sulphate
d. magnesium chloride.
b
Pick out the endothermic reaction out of the following.
a. C+1⁄2 O2 = CO
b. CO + 3H2 = CH4 + H2O
c. CaCO3 = CaO + CO2
d. CO +1⁄2 O2 = CO2
c
Pasteurisation of milk means
a. removal of fatty and albuminous substance from it.
b. killing of organisms present in it by heating
it at controlled temperature without
changing its natural characteristics.
c. inhibiting the growth of micro-organisms
without killing them.
d. none of these.
b
Fusion of bauxite and __________ produces high alumina cement.
a. alum
b. limestone
c. coke
d. Quartz
b
__________ process is used for the manufacture
of sodium carbonate by ammonia soda process.
a. Ostwald’s
b. Bosch
c. Solvay
d. Haber’s
c
Polycaprolactum is commercially known as
a. nylon-6
b. nylon-66
c. dacron
d. Rayon
a
Frasch process is for
a. making oxygen
b. producing helium
c. mining sulphur
d. making nitrogen
c
Very fine suspended and colloidal impurities are removed from water by a process called
a. sedimentation
b. coagulation
c. disinfection
d. Softening
b
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because
a. its calorific value is very less.
b. tar neutralises the residual acids present in
pitch.
c. it reduces viscosity and imparts fluidity for
its transportation through pipelines at
economic pressure drop.
d. all (a), (b) and (c).
c
Which is the main reducing agent during production of iron from iron ore in a blast furnace ?
a. C
b. CO
c. CO2
d. H2
b
The drug used in contraceptives is
a. sulphadizene
b. mestranol
c. methyl salicylate
d. Pencillin
b
Raw materials used for producing __________
cement does not contain iron oxide.
a. waterproof
b. slag
c. white
d. Pozzolan
c
In the Lurgi coal gasifier
a. coking coals cannot be used.
b. low carbon conversion efficiency is
achieved.
c. entrainment of solids is higher.
d. large quantity of coal can be processed.
c
Neon gas is
a. flammable in nature.
b. used in color discharge tube.
c. filled in lamps having tungsten filament.
d. all (a), (b) and (c).
b
