__________ is produced by the dehydrogenation of ethyl benzene.
Styrene
Ethyl alcohol
Cumene
Phenol
Correct Answer :
A. Styrene
Related Questions
Zeigler process
Produces high density polyethylene
Produces low density polyethylene
Uses no catalyst
Employs very high pressure
Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate
Is prone to thermal decomposition
Has high water solubility and is unstable
Is soluble in ammonium chloride and potassium chloride solution
All (A), (B) and (C)
Fourdrinier machine is used in the manufacture of
Nylon-6
Paper
Antibiotics
Sugar
Catalytic oxidation-dehydrogenation of methyl alcohol produces
Formaldehyde
Phenol
Acetone
Maleic anhydride
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used
As a lubricant
As a rust preventive
In hard water for cleaning of cloth
As a foam depressant in distillation column
Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the
Fertiliser manufacture
Car battery solution
Synthesis of oleum
Water treatment
Pick out the endothermic reaction out of the following.
C+ ½O2 = CO
CO + 3H2 = CH4 + H2O
CaCO3 = CaO + CO2
CO + ½O2 = CO2
Calcination of gypsum produces
Plaster of Paris
Salt cake
Nitre cake
Lime
Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.
10
50
80
95
Hydrolysis of sugar is called
Hydration
Inversion
Esterification
None of these
Which of the following is not a raw material used for the manufacture of ordinary glass?
Iron oxide
Soda ash
Limestone
Silica
Viscose rayon
Cannot be made from sulphite pulp
Utilises H2SO4, NaOH and CS2 during its manufacture
Cannot yield textile grade fibre
None of these
Solvent extracted oil
Has low free fatty acid content
Is odourless
Has more of unsaturates
None of these
Glauber's salt is chemically
Calcium sulphate
Potassium sulphate
Potassium chlorate
None of these
Use of hydrated lime in water treatment
Before filtration, reduces the bacterial load on filters
After filtration, combats the corrosiveness of water due to the presence of O2 & CO2
Is to adjust the pH value
All (A), (B) and (C)
High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to
Flocculate the impurities
Facilitate fast filtration
Both (A) and (B)
Neither (A) nor (B)
Nylon-66 is so named because the
Average degree of polymerisation of the polymer is 1966
Number of carbon atoms between two nitrogen atoms are 6
Number of nitrogen atoms between two carbon atoms are 6
Polymer was first synthesised in 1966
Production of alcohol by fermentation of molasses is a/an __________ process.
Anaerobic
Aerobic
Endothermic
Both (B) and (C)
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)
An alkali metal salt of Palmitic acid is known as
Soap
Metallic soap
Detergent
Alkaloid
Wet chlorine gas produced during electrolysis of brine is dehydrated by
Spraying 66° Be H2SO4 counter current to the flow of the gas
Passing it through a bed of diatomaceous earth
Passing it through a bed of silica gel
None of these
Varnish does not contain
Thinner
Pigment
Both (A) & (B)
Neither (A) nor (B)
High temperature carbonisation of coal takes place at __________ °C.
2000
700
1100
< 500
Bakelite is chemically known as
Polyvinyl chloride (PVC)
Polybutadiene
Phenol formaldehyde
Polyurethane
Hydrophilic group of a soap or detergent solution is
Water hating
Soil loving
Water loving
None of these
Haemoglobin is a/an
Amino acid
Biological catalyst
Protein
Enzyme
Which is the main reducing agent during production of iron from iron ore in a blast furnace?
C
CO
CO2
H2
Hydrogenation of edible vegetable oils
Is an exothermic reaction
Increases their melting point
Is done in presence of nickel catalyst
All (A), (B) and (C)
DDT should not be allowed to come in contact with iron (during its manufacture) to
Avoid its decomposition
Prevent sulphonation of the monochlorobenzene by the acid catalyst
Achieve non-hygroscopic property
None of these
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