Phthalic anhydride is made by the
Oxidation of naphthalene
Oxidation of benzene
Dehydrogenation of ethyl benzene
None of these
Correct Answer :
A. Oxidation of naphthalene
Related Questions
Hydrogen gas is not produced commercially (for nitrogenous fertiliser manufacture) by
Iron-steam reaction
Electrolysis of water
Steam reforming of naphtha
Its cryogenic separation from coke oven gas
Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about __________ °C.
-53
-103
-183
-196
P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as
Bakelite
Neoprene
Teflon
Nylon-66
Common salt is generally not produced commonly by __________ method from brine.
Freeze drying
Electrolytic
Solar evaporation
Vacuum evaporation
Good quality of edible salt is obtained from brine by the process of
Solar evaporation
Vacuum evaporation
Freeze drying
Electrolysis
Hydrochloric acid is also known as
Oil of vitriol
Muriatic acid
Strong organic acid
Green acid
Which of the following is not present in bagasse fibre?
Cellulose
Lignin
Pentogens
None of these
Acetone is produced by catalytic dehydrogenation of
Phenol
Naphthalene
Isopropanol
Ethyl benzene
Phthalic anhydride is used
In making PVC
As plasticisers
In insecticides manufacture
For making nylon-6
Which of the following is the purest form of water out of the following?
Underground water
Rain water
Well water
Lake water
Penicillin is separated from fermented broth by
Extraction with amyl or butyl acetate
Ternary Azeotropic distillation
Evaporator in calandria
Extractive distillation
Salt is the basic raw material for the manufacture of
Cement
Glass
Potteries
Caustic soda
Lime and soda ash are added to water to remove
Bicarbonates & sulphates of calcium and magnesium
Undesirable taste and odour
Bacteria
Its corrosiveness
Which of the following is not a product of coal tar distillation?
Anthracene
Creosote oil
Carbolic oil
None of these
__________ is produced using Polycondensation reaction.
Polythene
Phenol formaldehyde
Poly vinyl chloride
None of these
Which of the following is used as a coagulant in water treatment?
Chloramine
Chlorine
Ferrous sulphate
Hydrogen peroxide
Metallic soap is __________ salt of fatty acids.
Sodium
Potassium
Both sodium & potassium
Aluminium or calcium
Pick out the wrong statement.
Strongly caking coal should not be used in the Lurgi gasifier
Acetylene gas cannot be used for illumination purpose
Water gas is called blue gas because of the color of the flame, when it is burnt
Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels
Ethyl alcohol cannot be produced
From waste sulphite substrate of paper mills
By Esterification and hydrolysis of ethylene
From molasses
None of these
Lithophane is
Explosive
White lead
Filter aid
ZnS (white pigment)
Polycaprolactam is commercially known as
Nylon-6
Nylon-66
Dacron
Rayon
An oil is converted into fat by its
Hydrogenation
Hydrolysis
Hydrocracking
Hydration
Pure rectified spirit contains about __________ percent alcohol.
45
70
95
99.5
Coke used for the production of calcium carbide should have
Low ash content
Low ignition temperature
High electrical resistivity
All (A), (B) and (C)
Percentage of uranium in Carnotite ore found in Jadugoda (Jharkhand) is about
0.1 to 0.5
1 to 5
5 to 10
15 to 25
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
Which form of sulphur is the most stable at room temperature?
Plastic
Monoclinic
Rhombic
Flowers of sulphur
Which of the following is used as a coagulant in treating turbid water?
Chlorine
Ferric sulphate
Calcium sulphate
Activated carbon
Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its
Poor oxidation stability and high gum forming tendency
Greater tendency of decomposition at elevated temperature
Hydrolysis tendency in presence of water
All (A), (B) and (C)
Fusel oil is a/an
Essential oil
Extract from medicinal herbs
Mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses).
None of these