Naphthalene is removed from coke oven gas by
Adsorbing on palladium
Absorbing in ethanolamine
Scrubbing with wash oil
Passing it through electrostatic precipitator
Correct Answer :
C. Scrubbing with wash oil
Related Questions
Extraction of __________ employs an electrolytic process.
Aluminium
Silver
Copper
All (A), (B) and (C)
Thermoplastic materials
Do not soften on application of heat
Are heavily branched molecules
Are solvent insoluble
None of these
Hydrophilic group of a soap or detergent solution is
Water hating
Soil loving
Water loving
None of these
Calgon used in water treatment is chemically
Sodium phosphate
Sodium hexametaphosphate
Calcium phosphate
Tricresyl phosphate
__________ is not a constituent of gun powder.
Carbon
Charcoal
Sulphur
Potassium nitrate
Styrene is produced from ethyl benzene by the process of
Dehydrogenation
Oxidation
Alkylation
Dehydration
Sugar content in sugarcane on cane basis is about __________ percent by weight.
1 to 5
5 to 10
15 to 20
20 to 30
Permanent hardness of water can be removed by
Boiling
Adding Ca(OH)2
Boiling it with Na2CO3
None of these
Essential oils are usually obtained using
Steam distillation
Extractive distillation
Solvent extraction
Leaching
Hydrolysis of sugar is called
Hydration
Inversion
Esterification
None of these
Which of the following is used as a coagulant in water treatment?
Chloramine
Chlorine
Ferrous sulphate
Hydrogen peroxide
Very fine suspended and colloidal impurities are removed from water by a process called
Sedimentation
Coagulation
Disinfection
Softening
Chemical name of aspirin (an analgesic drug) is
Acetylsalicylic acid
Nictonic acid
Calcium acetate
Methyl salicylate
A good quality coal should have
Low fusion point of ash
High ash content
High sulphur content
None of these
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.).
1
10
25
40
Which one of the following is not an elastomer?
Polyisoprene
Neoprene
Nitrile-butadiene
None of these
Calcination of gypsum produces
Plaster of Paris
Salt cake
Nitre cake
Lime
Yellow glycerine is made into white, using
Activated carbon
Diatomaceous earth
Bauxite
Bentonite
Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.
SO3
Cl2
NH3
SO2
Claude process of gas liquefaction employs
Merely compression of gas beyond its critical pressure
Joule-Thomson expansion cooling
Heat exchange with colder stream
Adiabatic expansion against a piston or in a turbine
Hydrazine is largely used
As a starting material for 'hypo'
In photographic industry
As rocket fuel
In printing industry
Pick out the wrong statement.
Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action
Soap powder is prepared by mixing soap with hydrated sodium carbonate
Detergents differ from soaps in their action in hard water
Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc
Styrene is produced from ethyl benzene by the process of
Dehydrogenation
Oxidation
Alkylation
Dehydration
Presence of carbonaceous matter in the sewage
Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures
Reduces sulphate ions to sulphides causing obnoxious smell
Increases the quantity of chlorine used for its purification
All (A), (B) and (C)
Polythene is a/an __________ polymerisation product.
Addition
Condensation
Thermosetting
None of these
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
Endothermic
Exothermic
Irreversible
Both (B) and (C)
In the Lurgi coal gasifier
Coking coals cannot be used
Low carbon conversion efficiency is achieved
Entrainment of solids is higher
Large quantity of coal can be processed
Type of glass used in optical work is the __________ glass.
Soda-lime
Fibre
Lead
Borosilicate
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
Dilute H2SO4
Oleum
Ultraviolet light
None of these
Silicon carbide is a/an
Adhesive
Abrasive
Type of glass
Brittle material