Hydrogenation of oil does not
Remove double bonds
Raise its melting point
Improve its resistance to oxidation
None of these
Correct Answer :
D. None of these
Related Questions
Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.
10
50
80
95
Phenol is mainly used
To produce benzene
To produce phenol formaldehyde
To produce polyester resin
As a plasticiser for unsaturated polyester
During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to
Increase the rate of absorption
Avoid corrosion
Reduce the cooling water circulation rate
None of these
Synthetic glycerine is produced from
Toluene
Phenol
Propylene
Naphthalene
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.
Independent of
Directly proportional to
Inversely proportional to
Proportional to the square of
Function of sodium thiosulphate (hypo) in development of photographic film/plate is to
Brighten the faint images
Remove metallic silver
Convert silver chloride to silver
Remove unexposed silver halide
The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by
Electrolysis
Electrolytic reduction
Electrolytic oxidation
None of these
Rancidity of the fatty oil can be reduced by its
Decoloration
Hydrogenation
Oxidation
Purification
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
Thermal pyrolysis of ethylene dichloride produces
Trichloroethylene
Vinyl chloride
Ethanol amine
Ethylene oxide
Titanium dioxide is a/an __________ colour pigment.
White
Black
Yellow
Blue
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
Kopper-Totzek coal gasifier
Can give ammonia synthesis gas (H2 + N2)
Is a moving bed reactor
Cannot use coking coal
Operate at very high pressure
Presence of sodium tripolyphosphate (an additive) in synthetic detergent
Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)
Inhibits its corrosive effects
Does not allow redeposition of dirt on the cleaned surface
None of these
Glauber's salt is chemically represented by
Na2SO4.10H2O
CaCl(OCl)
CaSO4.H2O
(NH4)2SO4
Calgon used in water treatment is chemically
Sodium phosphate
Sodium hexametaphosphate
Calcium phosphate
Tricresyl phosphate
Viscose rayon
Cannot be made from sulphite pulp
Utilises H2SO4, NaOH and CS2 during its manufacture
Cannot yield textile grade fibre
None of these
__________ Nature of hypo (sodium thiosulphate) makes it useful in photography.
Oxidising
Reducing
Complex forming
Photochemical
Addition of calcium oxide to water produces
Exothermic heat
Hissing sound
Slaked lime
All (A), (B) & (C)
Dechlorination of treated water is necessary to
Remove residual turbidity
Reduce the bacterial load on filter
Control taste and odour
Remove chlorinous taste
In sulphate pulp manufacture, the pressure and temperature in the digestor is
10 atm., 800 °C
10 atm., 170-180°C
1 atm., 170 - 180°C
1 atm., 800°C
Chloramines are used in water treatment for
Disinfection and control of taste & odour
Corrosion control
Removing turbidity
Control of bacteria
Which of the following is an organometallic compound?
Isopropyl alcohol
Tetra-ethyl lead
Zeolite
Cumene
__________ is used as a flux in the smelting of copper ore like chalcopyrite.
Coke breeze
Lime powder
Silica/quartz
Dolomite
The type of high refractive index glass used in optical instruments is __________ glass.
Pyrex
Flint
Crookes
None of these
Zeolite is a/an
Naturally occuring clay which is capable of exchanging cations
Abrasive material
Catalyst used in shift conversion
None of these
Pick out the true statement pertaining to water treatment.
Slow sand filters can remove colour completely
Activated carbon can be used for taste & odour control without subsequent filtration
Application of activated carbon reduces the temporary hardness of water
Normally, the turbidity is removed by adding a coagulant prior to sedimentation
Which form of sulphur is the most stable at room temperature?
Plastic
Monoclinic
Rhombic
Flowers of sulphur
Which of the following is not a pyrite ore?
Celestite
Galena
Gypsum
Siderite
Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively
V2O5 & Cr2O3.
Oxides of nitrogen & Cr2O3
V2O5 on a porous carrier & oxides of nitrogen
Oxides of nitrogen & V2O5 on a porous carrier