Average sulphur content in Indian pyrites is about __________ percent.
15
35
55
70
Correct Answer :
B. 35
Related Questions
Sulphur removal by heating of pyrite ore in presence of air is called its
Reduction
Roasting
Calcination
Smelting
Sulphuric acid completely saturated with sulphur trioxide is called
Concentrated sulphuric acid
Oleum
Sulphurous acid
Dilute sulphuric acid
Thermal pyrolysis of ethylene dichloride produces
Trichloroethylene
Vinyl chloride
Ethanol amine
Ethylene oxide
Grignard reagent is chemically known as
Ethyl magnesium chloride
Methyl magnesium chloride
Dichlorophenol
Monochloroacetic acid
Neoprene is chemically known as
Polybutadiene
Styrene butadiene rubber (SBR)
Polyurethane
Polychlorophrene
At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system).
P
√P
P2
1/P
Alcohol percentage in molasses may be around
10
40
70
85
Sucrose is a disaccharide consisting of
Glucose and glucose
Glucose and fructose
Glucose and galactose
Fructose and galactose
Lurgi coal gasifier is a pressurised __________ bed reactor.
Moving
Fixed
Fluidised
Entrained
Refractory bricks burnt at very high temperature have got
Greater resistance to corrosion by slags
Less resistance to corrosion by slags
High spalling tendency
None of these
20% oleum means that in 100 kg oleum, there are 20 kg of
SO3 and 80kg of H2SO4
H2SO4 and 80kg of SO3
SO3 for each 100 kg of H2SO4
None of these
Essential oils are usually obtained using
Steam distillation
Extractive distillation
Solvent extraction
Leaching
Dacron is a
Condensation product of Hexamethylene diamine and adipic acid
Thermosetting material
Condensation product of dimethyl terephthalate and ethylene glycol
None of these
Cumene is the starting material for the production of
Benzoic acid
Phenol and acetone
Isoprene
Styrene
Yeast is used in the manufacture of
Penicillin
Antibiotics
Wine
Pasteurised milk
Catalyst used during the manufacture of 'Vanaspati Ghee' is
Zinc
Nickel
Platinum
Copper
Chloral is used in the manufacture of
DDT
BHC
Parathion
None of these
Digestion of wood-base materials (for manufacture of pulp) is done to
Remove lignin
Produce long fibres
Prevent deterioration on storage
None of these
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
Linde process of gas liquefaction employs
Exchange of heat with colder stream
Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
Adiabatic expansion against a piston or in a turbine
Merely compressing the gas beyond its critical pressure
Pick out the wrong statement.
Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate
Glass is decolorized during its manufacture by adding antimony oxide, manganese dioxide or arsenic oxide
Ordinary glass is represented chemically by Na2O . CaO . 6SiO2
Red color is imparted to glass by addition of arsenic oxide
Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.
Adsorbs
Oxidises
Reduces
Converts
Viscose rayon
Cannot be made from sulphite pulp
Utilises H2SO4, NaOH and CS2 during its manufacture
Cannot yield textile grade fibre
None of these
Contact process of sulphuric acid manufacture
Yields acid of higher concentration than chamber process
Yields acids of lower concentration than chamber process
Is obsolete
Eliminates absorber
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
Endothermic
Exothermic
Irreversible
Both (B) and (C)
Solvent extracted oil
Has low free fatty acid content
Is odourless
Has more of unsaturates
None of these
Which of the following is not produced commercially from sea water?
Magnesium & potassium compounds
Common salt
Bromine
Iodine
Hydrophilic group of a soap or detergent solution is
Water hating
Soil loving
Water loving
None of these
Kaolin is a/an
Refractory material
Synthetic resin
Artificial abrasive
Blue pigment
Fusion of limestone and __________ produces high alumina cement.
Sand
Bauxite
Quicklime
Calcite