Manufacture of phthalic anhydride uses __________ as a catalyst.
Ni
Cr
V2O5
Al2O3
Correct Answer :
C. V2O5
Related Questions
Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of
Nitric acid
Hydrochloric acid
Methyl alcohol
Formic acid
Raw material used in alcohol distilleries in India is
Molasses
Benzol
Methylated spirit
None of these
Very fine suspended and colloidal impurities are removed from water by a process called
Sedimentation
Coagulation
Disinfection
Softening
A 'unit process' is exemplified by the
Distillation
Hydrogenation of oils
Absorption
Humidification
__________ of rubber decreases after its vulcanisation.
Resistance to the action of organic solvent
Tackiness
Maximum service temperature
Tensile strength
Which of the following is not present in bagasse fibre?
Cellulose
Lignin
Pentogens
None of these
Permanent hardness of water can be removed by
Boiling
Adding Ca(OH)2
Boiling it with Na2CO3
None of these
Celluloid is chemically
Cellulose acetate
Regenerated cellulose
Cellulose nitrate
Cellulose acetate butyrate
Adipic acid is an intermediate in the manufacture of
Perspex
Nylon-66
Polystyrene
Bakelite
Viscosity index improver (like polystyrene or polyisobutylene) is added to lubricant to
Reduce its viscosity
Increase its viscosity
Reduce the variation in its viscosity with temperature
Increase the variation in its viscosity with temperature
Hydrophilic group of a soap or detergent solution is
Water hating
Soil loving
Water loving
None of these
Hydrochloric acid is also known as
Oil of vitriol
Muriatic acid
Strong organic acid
Green acid
Helium is produced on commercial scale from
Air
Natural gas
Coke oven gas
None of these
In an integrated steel plant, NH3 present in coke oven gas is normally recovered as
(NH4)2SO4
NH4Cl
(NH4)2 NO3
Liquid NH3
Pig iron is produced by blast furnaces in India using mostly the iron ore named
Hematite
Magnetite
Siderite
Chalcopyrite
Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.
10
50
80
95
Sucrose is a
Monosaccharide
Disaccharide
Polysaccharide
None of these
CaCl(OCl) is the chemical formula of
Hypo
Bleaching powder
Plaster of Paris
Aqua regia
Glauber's salt is chemically
Calcium sulphate
Potassium sulphate
Potassium chlorate
None of these
Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have
High electrical insulation properties
Sharp melting points
Low co-efficient of thermal expansion
Compressive strength much greater than their tensile strengths
Yellow glycerine is made into white, using
Activated carbon
Diatomaceous earth
Bauxite
Bentonite
Chalcopyrite is the main ore of
Copper
Lead
Tin
Iron
Deaeration of water in its treatment is necessary, as it
Minimises its turbidity
Helps in controlling its taste and odour
Minimises its corrosiveness
None of these
Which of the following is not an antibiotic?
Penicillin
Streptomycin
Tetracycline
Quinine
Ore concentration by froth floatation utilises the __________ of ore particles.
Density difference
Wetting characteristics
Terminal velocities
None of these
Which of the following is an yellow pigment?
Titanium dioxide
Ferrous sulphate
Lead chromates
Zinc sulphides
The biochemical treatment applied to sewage effluents is a process of
Dehydration
Reduction
Oxidation
Polymerisation
Finely ground calcium aluminate & silicate is a/an
Cermet
Cement
Abrasive
Explosive
Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an
Explosive
Soap
Detergent
Analgesic drug
Fermentator temperature during production of alcohol from molasses is around __________ °C.
5
30
130
300