Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.
Mechanical
Sulphate/Kraft
Sulphite
Neutral sulphite semi-chemical
Correct Answer :
D. Neutral sulphite semi-chemical
Related Questions
Bitterns is a/an
Unsaturated fat
Starting material for the production of iodine
By-product of chlor-alkali industry
None of these
Bromine content in sea water may be around __________ ppm.
70
640
1875
2500
Neoprene is chemically known as
Polybutadiene
Styrene butadiene rubber (SBR)
Polyurethane
Polychlorophrene
Thermoplastic materials
Do not soften on application of heat
Are heavily branched molecules
Are solvent insoluble
None of these
Electro deposition of metals i.e. electroplating is never done on
Metals
Alloys
Refractories
Non-metals
Chloral is used in the manufacture of
DDT
BHC
Parathion
None of these
Electric bulbs are made of __________ glass.
Jena
Flint
Crookes
Pyrex
Kaolin is a/an
Refractory material
Synthetic resin
Artificial abrasive
Blue pigment
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)
Sodium chloride content in sea water is about __________ gms/litre.
2
10
25
50
Which of the following is not produced on commercial scale from sea water?
Bromine
Magnesium compounds
Potassium compounds
Sodium sulphate
Function of sodium thiosulphate (hypo) in development of photographic film/plate is to
Brighten the faint images
Remove metallic silver
Convert silver chloride to silver
Remove unexposed silver halide
Resistance to fusion of the refractory under a steady rising temperature condition is called
Spalling
Refractoriness
Both (A) & (B)
Neither (A) nor (B)
The basic constituent of vegetable oils is
Triglyceride
Fatty acids
Fatty alcohol
Mono esters
Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda?
Diaphragm electrolytic cell process
Mercury electrolytic cell process
Lime-soda process
None of these
Production of one ton of cement requires about __________ tons of limestone.
0.6
1.2
2.2
3.8
Flash point of most vegetable oils is about __________ °C.
50
100
200
300
Raw material used in alcohol distilleries in India is
Molasses
Benzol
Methylated spirit
None of these
__________ is used as a flux in the smelting of copper ore like chalcopyrite.
Coke breeze
Lime powder
Silica/quartz
Dolomite
__________ is used as a catalyst in fat splitting.
ZnO
Ni
V2O5
FeO
Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.
25
60-70
150-200
250-300
Dichloro diphenyl __________ is the full form of DDT (an insecticide).
Tetrachloroethane
Trichloroethane
Tetrachloromethane
Trichloromethane
Which is the main reducing agent during production of iron from iron ore in a blast furnace?
C
CO
CO2
H2
Aryl benzene sulphonate (ABS) is a
Detergent
Plasticiser for unsaturated polyester
Starting material for the synthesis of glycerine
Coating ingredient for photographic film
Good quality of edible salt is obtained from brine by the process of
Solar evaporation
Vacuum evaporation
Freeze drying
Electrolysis
The noble gas which occurs most abundantly in the atmosphere is
Helium
Neon
Krypton
Argon
Phenol formaldehyde is produced by condensation polymerisation. It is also known as
Teflon
Bakelite
Polyester
Nylon-66
Nylon-6 is a
Polyamide
Thermosetting resin
Polyester
None of these
Catalytic oxidation of naphthalene produces
Styrene
Phenol
Phthalic anhydride
None of these
Zeolite is a/an
Naturally occuring clay which is capable of exchanging cations
Abrasive material
Catalyst used in shift conversion
None of these