Which is a high grade pulp?
Rag pulp
Mechanical pulp
Sulphate pulp
Sulphite pulp
Correct Answer :
C. Sulphate pulp
Related Questions
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Hydrogenation
Hydrolysis
Hydrocracking
Hydration
The function of gypsum addition during cement making is to
Increase the density of cement
Decrease the cement setting rate
Both (A) and (B)
Neither (A) nor (B)
Penicillin, an antibiotic drug was discovered by
Alexander
Flaming
Doctor Zhivago
None of these
__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.
Pyrex
Soda lime
Lead
High silica
Industrial production of chloroform requires acetone and
Phosgene
Calcium hypochlorite
Chlorine
Ammonium chloride
Nitro-glycerine absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as controlled explosive called dynamite. The raw material used for its manufacture are glycerine, nitric acid and
Sulphuric acid
Phosphoric acid
Hydrochloric acid
Hydrofluoric acid
Liquefaction of gases cannot be done by
Exchange of heat with colder stream
Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
Merely compressing it beyond critical pressure
Adiabatic expansion against a piston or in a turbine
Aryl benzene sulphonate (ABS) is a
Detergent
Plasticiser for unsaturated polyester
Starting material for the synthesis of glycerine
Coating ingredient for photographic film
Enamels
Give good glossy finish
Are same as varnish
Are prepared from non-drying oil
Do not contain pigment
Glauber's salt is chemically
Calcium sulphate
Potassium sulphate
Potassium chlorate
None of these
Low purity oxygen is used for
L.D. steel making
Cutting and welding of metals
Medicinal purposes
Chemical oxidation processes
Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction
Decreases with decrease of thickness of the flakes
Increases with the increasing flake size keeping the flake thickness constant
Increases considerably with the rise of temperature
Decreases as the moisture content of flakes increases
Process conditions in fermentator used for production of penicillin is
25°C, 2 atm
50°C, l0 atm
30°C, 200 mm Hg (absolute)
90°C, 45 atm
Tall oil obtained as a by-product from the black liquor recovery is
A black, sticky & viscous liquid
Used in the manufacture of greases, emulsions & soaps
Composed mainly of rosin & fatty acids
All (A), (B) & (C)
In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the
Diamine and the ring
Dibasic acid and the ring
Diamine and the dibasic acid
None of these
Polycaprolactam is commercially known as
Nylon-6
Nylon-66
Dacron
Rayon
The drug used in contraceptives is
Sulfadiazine
Mestranol
Methyl salicylate
Penicillin
Separation of fresh water from sea water can be done by the __________ operation.
Osmosis
Reverse osmosis
Absorption
Adsorption
Pick out the wrong statement.
Fibrillation of fibre during paper manufacture is done to develop the strength in paper
Alkali consumption in digestion/cooking of bamboo is measured in terms of permanganate number
Bagasse fibre contains both lignin & cellulose
Presence of sodium sulphate in pulp makes the pulp bleachability poor
Epoxy resin
Is a good adhesive
Is an elastomer
Cannot be used for surface coatings
Is a polyester
Vulcanisation of rubber
Decreases its tensile strength
Increases its ozone & oxygen reactivity
Increases its oil & solvent resistance
Converts its plasticity into elasticity
A mixture of chlorine & sodium bromide acts as a/an
Insecticides
Analgesic drug
Fire retardant
Hydrogenation catalyst
Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively
V2O5 & Cr2O3.
Oxides of nitrogen & Cr2O3
V2O5 on a porous carrier & oxides of nitrogen
Oxides of nitrogen & V2O5 on a porous carrier
Resistance to fusion of the refractory under a steady rising temperature condition is called
Spalling
Refractoriness
Both (A) & (B)
Neither (A) nor (B)
The most commonly used substance to speed up the sedimentation of sewage is
Lime
Sulphuric acid
Chlorine
Sodium bisulphite
Na2CO3 is called
Washing soda
Soda ash
Plaster of Paris
Calcite
Fumigant insecticides
Kill insects, when they eat it
Emit poisonous vapour
Are absorbed throughout the plant
None of these
Sulphur addition in soap is done to
Improve the soap texture
Cure pimples & dandruff
Fasten lather formation
Increase its cleansing action
Pick out the wrong statement.
Catalytic hydrogenation of carbon monoxide produces methyl alcohol
In nylon-6, the number 6 represents the total number of carbon atoms in the ring
Raw materials for DDT manufacture are benzene and chlorine
Ethanolamines are produced by using ammonia and ethylene oxide as raw material
The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
SASOL (in South Africa)
Redcar (U.K.)
Los Angeles (U.S.A.)
Trombay (India)