section 6 Flashcards
Tall oil obtained as a by-product from the black liquor recovery is
a. a black, sticky & viscous liquid.
b. used in the manufacture of greases, emulsions & soaps.
c. composed mainly of rosin & fatty acids.
d. all (a), (b) & (c).
d
In multistage equilibrium conversion of
SO2 to SO3 (2SO2 + O2 2SO3),
the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to SO3 can be increased by
a. increasing the oxygen concentration.
b. putting more quantity of V2O5 catalyst in the converter.
c. removing some quantity of SO3 during intermediate stage.
d. maintaining low temperature & pressure in the converter.
c
__________ is a polysacchride.
a. Maltose
b. Starch
c. Sucrose
d. Glucose
b
Styrene is produced from ethyl benzene by the process of
a. dehydrogenation
b. oxidation
c. alkylation
d. Dehydration
a
Acetone is produced by catalytic
dehydrogenation of
a. phenol
b. naphthalene
c. isopropanol
d. ethyl benzene
c
Nitrogen is an essential component of
a. mineral salts
b. carbohydrates
c. fats
d. Proteins
d
Bromine content in sea water may be around __________ ppm.
a. 70
b. 640
c. 1875
d. 2500
a
Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume
in air is
a. 0.14
b. 0.34
c. 0.94
d. 1.4
c
Poly tetraflouro ethylene (P.T.F.E.) is known as
a. bakelite
b. teflon
c. celluloid
d. Decron
b
Bakelite is
a. same as poly tetrafluoroethylene (PTFE).
b. an inorganic polymer.
c. same as thermosetting phenol-
formaldehyde.
d. not a polymer.
c
__________ is produced by the
dehydrogenation of ethyl benzene.
a. Styrene
b. Ethyl alcohol
c. Cumene
d. Phenol
a
Which of the following is used as a coagulant in water treatment?
a. Chloramine
b. Chlorine
c. Ferrous sulphate
d. Hydrogen peroxide
c
__________ paper is used in the manufacture of
newsprint paper.
a. Groundwood
b. Board
c. Tissue
d. Wrapping
a
Hydrodenation of vegetable oils is a/an__________ reaction.
a. endothermic
b. autocatalytic
c. exothermic
d. Homogenous
c
Permanent hardness of water is due to the presence of calcium & magnesium
a. bi-carbonates
b. sulphates & chlorides
c. carbonate
d. none of these
b
Concentration of sulphide ores is done usually by
a. roasting
b. smelting
c. froth floatation
d. electro magnetic separation
c
Dacron is a/an
a. polyester
b. unsaturated polyster
c. polyamide
d. inorganic polymer
a
Sodium carbonate (soda ash) is not used in the manufacture of
a. fire extinguishers
b. sugar
c. baking powder
d. Detergents
d
Viscose rayon
a. cannot be made from sulphite pulp.
b. utilises H2SO4, NaOH and CS2 during its
manufacture.
c. cannot yield textile grade fibre.
d. none of these.
b
Nylon 6-6 is manufactured from
a. hexamethylene diamine and adipic acid.
b. hexamethylene diamine and maleic
anhydride.
c. caprolactum.
d. dimethyl terephthalate and ethylene glycol.
a
Glauber’s salt is chemically represented by
a. Na2SO4.10H2O
b. CaCl(OCl)
c. CaSO4.H2O
d. (NH4)2SO4
a
Chemical name of Grignard reagent is
a. sodium thiosulphate.
b. ethyl magnesium chloride.
c. sodium sulphite.
d. sodium bicarbonate.
b
Which of the following processes is absent in glass manufacturing process ?
a. Sintering
b. Annealing
c. Shaping or forming
d. Melting
a
Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.
a. 1
b. 2.5
c. 5
d. 10
b
Dacron (or terylene) fibres as compared to nylon’fibres have
a. better heat & acid resistant properties.
b. poorer resistance to alkalis.
c. poorer dyeability.
d. all (a), (b) and (c).
d
Grignard reagent is chemically known as
a. ethyl magnesium chloride.
b. methyl magnesium chloride.
c. dichlorophenol.
d. monochloro acetic acid.
a
The function of gypsum addition during cement making is to
a. increase the density of cement.
b. decrease the cement setting rate.
c. both (a) and (b).
d. neither (a) nor (b).
b
Low purity oxygen is used for
a. L.D. steel making.
b. cutting and welding of metals.
c. medicinal purposes.
d. chemical oxidation processes.
d
starting raw material.
a. Methyl alcohol
b. Ethyl alcohol
c. Benzol
d. Dimethyl ether
b
Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have
a. high electrical insulation properties.
b. sharp melting points.
c. low co-efficient of thermal expansion.
d. compressive strength much greater than
their tensile strengths.
b
A substance produced by a living organism and capable of anti-microbial activity is called a/an
a. antibiotic
b. antiseptic
c. disinfectant
d. none of these
a
Deaeration of water in its treatment is necessary, as it
a. minimises its turbidity.
b. helps in controlling its taste and odour.
c. minimises its corrosiveness.
d. none of these.
c
Hydrochloric acid is also known as
a. oil of vitriol
b. muriatic acid
c. strong organic acid
d. green acid
b
Aryl benzene sulphonate (ABS) is a
a. detergent.
b. plasticiser for unsaturated polyester.
c. starting material for the synthesis of glycerine.
d. coating ingredient for photographic film.
a
Adipic acid is an intermediate in the
manufacture of
a. perspex
b. nylon-66
c. polystyrene
d. Bakelite
b
The temperature in the calcium carbide furnace
is __________ °C.
a. 200-300
b. 700-850
c. 2000-2200
d. 4000-4500
c
Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a
pressure & temperature of
a. 4 kgf/cm2 & 500°C.
b. 10 kgf/cm2 & 1000°C.
c. 40 kg/cm2 & 200°C.
d. 100 kgi/cm2 & 500°C.
a
Soaps remove dirt by
a. increasing the surface tension.
b. decreasing wettability.
c. supplying hydrophyllic group.
d. none of these.
d
Which of the following additives/water proofing agents is added to lower the hydrophilic
(moisture loving) characteristic of cement ?
a. Xanthates
b. Stearic acid
c. Calcium & aluminium stearate
d. Formic acid
c
Chemical name of soda ash is
a. sodium bicarbonate
b. sodium thiosulphate
c. potassium carbonate
d. none of these
d
Out of the following processes of paper pulp manufacture, the maximum corrosion problem in
digestion & handling equipments is encountered in the __________ process.
a. mechanical
b. sulphate/kraft
c. sulphite
d. neutral sulphite semi-chemical
d
__________ is used as a flux in the extraction
of iron from iron ore (hametite) in blast furnace.
a. Bauxite
b. Limestone
c. Quartz
d. Manganese
b
Gun powder uses
a. sulphur
b. charcoal
c. potassium nitrate
d. all (a), (b), & (c)
d
Dichloro diphenyl __________ is the full form of DDT (an insecticide).
a. tetrachloroethane
b. trichloroethane
c. tetrachloromethane
d. Trichloromethane
b
The basic difference between vegetable oils and fats is in their
a. density
b. chemical properties
c. physical state
d. Composition
c
Which of the following is not a food additive?
a. Citric acid
b. Invertage
c. Benzoyl peroxide
d. Ammonium chloride
d
Alum is commercially produced from
a. gypsum
b. feldspar
c. galena
d. Bauxite
d
CaO is called
a. quick lime
b. slaked lime
c. limestone
d. Calcite
a
Starting raw material for the manufacture of
maleic anhydride is
a. n-butene
b. benzene
c. either (a) or (b)
d. neither (a) nor (b)
c
Pick out the wrong statement.
a. Fibrillation of fibre during paper
manufacture is done to develop the strength in paper.
b. Alkali consumption in digestion/cooking of
bamboo is measured in terms of
permangnate number.
c. Bagasse fibre contains both lignin &cellulose.
d. Presence of sodium sulphate in pulp makes the pulp bleachability poor.
d
