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.Management Sciences
Category: Chemical Process
Removal of dirt/soil by soaps or detergent does not involve the _______________ of soil ?
A. Emulsification
B. Dispersion
C. Precipitation
D. Wetting
99.5% purity oxygen is used in_____________________?
A. Cutting and welding by oxy-acetylene flame
B. Hospitals for medicinal purposes
C. Gas masks and artificial breathing apparatus
D. All A, B, and C.
Which of the following is a detergent ?
A. Benzene hexachloride
B. Alkyl benzene sulphonate
C. Polytetrafluoroethylene
D. Cellulose nitrate
Glass is__________________?
A. Mainly CaO
B. Subjected to galvanising
C. A super cooled liquid
D. All A , B. and C.
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________________?
A. Poor oxidation stability and high gum forming tendency
B. Greater tendency of decomposition at elevated temperature
C. Hydrolysis tendency in presence of water
D. All A, B. and C
In sulphate pulp manufacture, the pressure and temperature in the digestor is____________________?
A. 10 atm., 800 °C
B. 10 atm., 170-180°C
C. 1 atm., 170 – 180°C
D. 1 atm., 800°C
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed ?
A. Furnace → converter → absorber
B. Furnace → evaporator → absorber
C. Furnace → converter → evaporator
D. Converter → furnace → absorber
Epoxy resin__________________?
A. Is a good adhesive
B. Is an elastomer
C. Cannot be used for surface coatings
D. Is a polyester
Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of __________________?
A. 4 kgf/cm2 & 500°C
B. 10 kgf/cm2 & 1000°C
C. 40 kg/cm2 & 200°C
D. 100 kgf/cm2 & 500°C
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