Silicon carbide is a/an
A. Adhesive
B. Abrasive
C. Type of glass
D. Brittle material
Select an option to see the answer and solution.
Silicone is a/an
A. Thermoplastic
B. Inorganic polymer
C. Monomer
D. None of these
Select an option to see the answer and solution.
Pig iron is produced by blast furnaces in India using mostly the iron ore named
A. Hematite
B. Magnetite
C. Siderite
D. Chalcopyrite
Select an option to see the answer and solution.
In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 ⇋ 2SO3 ), the reverse reaction becomes appreciable at a temperature of 550°C. The percentage equilibrium conversion of SO2 to SO3 can be increased by
A. Increasing the oxygen concentration
B. Putting more quantity of V2 O5 catalyst in the converter
C. Removing some quantity of SO3 during intermediate stage
D. Maintaining low temperature & pressure in the converter
Select an option to see the answer and solution.
Which of the following is used as a binding material in soap to improve soap texture?
A. Rosin
B. Borax
C. Benzyl acetate
D. Sodium carbonate
Select an option to see the answer and solution.
Soaps remove dirt by
A. Increasing the surface tension
B. Decreasing wettability
C. Supplying hydrophyllic group
D. None of these
Select an option to see the answer and solution.
Which allotrope of sulphur is insoluble in carbon disulphide?
A. Rhombic sulphur
B. Monoclinic sulphur
C. Plastic sulphur
D. Milk of sulphur
Select an option to see the answer and solution.
Solvent extracted oil
A. Has low free fatty acid content
B. Is odourless
C. Has more of unsaturates
D. None of these
Select an option to see the answer and solution.
Pick out the wrong statement.
A. Strongly caking coal should not be used in the Lurgi gasifier
B. Acetylene gas can not be used for illumination purpose
C. Water gas is called blue gas because of the color of the flame, when it is burnt
D. Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels
Select an option to see the answer and solution.
Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate
A. Is prone to thermal decomposition
B. Has high water solubility and is unstable
C. Is soluble in ammonium chloride and potassium chloride solution
D. All of the above
Select an option to see the answer and solution.
Transparent soaps (e.g. Pears) are
A. Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency
B. Metallic soaps with frothing agent and free stearic acid to achieve transparency
C. Metallic soaps with frothing agent from which glycerine has not been recovered
D. None of these
Select an option to see the answer and solution.
Most widely and commonly used coagulant for the removal of suspended impurities in water is
A. Bleaching powder
B. Slaked lime
C. Alum
D. Copper sulphate
Select an option to see the answer and solution.
Claude process of gas liquefaction employs
A. Merely compression of gas beyond its critical pressure
B. Joule-Thomson expansion cooling
C. Heat exchange with colder stream
D. Adiabatic expansion against a piston or in a turbine
Select an option to see the answer and solution.
Linde process of gas liquefaction employs
A. Exchange of heat with colder stream
B. Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
C. Adiabatic expansion against a piston or in a turbine
D. Merely compressing the gas beyond its critical pressure
Select an option to see the answer and solution.
Production of alcohol by fermentation of molasses is an __________ process.
A. Anaerobic
B. Aerobic
C. Endothermic
D. Both B and C
Select an option to see the answer and solution.
Nickel is not used as a catalyst in the __________ reaction.
A. Shift conversion
B. Oil hydrogenation
C. Steaming reforming of naphtha
D. Ammonia cracking/dissociation
Select an option to see the answer and solution.
Main constituents of natural rubber is
A. Polystyrene
B. Polyisoprene
C. Polybutadiene
D. Polychloroprene
Select an option to see the answer and solution.
The type of high refractive index glass used in optical instruments is __________ glass.
A. Pyrex
B. Flint
C. Crookes
D. None of these
Select an option to see the answer and solution.
Sucrose is a
A. Monosacchride
B. Disacchride
C. Polysacchride
D. None of these
Select an option to see the answer and solution.
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like
A. High cost
B. Fragile nature
C. Easy poisoning tendency
D. All of the above
Select an option to see the answer and solution.