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.Management Sciences
Category: Chemical Process
Common salt is generally not produced commonly by ________________ method from brine ?
A. Freeze drying
B. Electrolytic
C. Solar evaporation
D. Vacuum evaporation
Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material ?
A. Slag cement
B. Glasses
C. Porcelain/Potteries
D. Teflon
Vulcanisation of rubber____________________?
A. Decreases its tensile strength
B. Increases its ozone & oxygen reactivity
C. Increases its oil & solvent resistance
D. Converts its plasticity into elasticity
Penicillin is made employing _______________ fermentation process?
A. Continuous
B. Aerobic batch
C. Anaerobic batch
D. None of these
Lurgi coal gasifier is a pressurised _______________ bed reactor ?
A. Moving
B. Fixed
C. Fluidised
D. Entrained
Dacron (or Terylene) fibres as compared to nylon fibres have__________________?
A. Better heat & acid resistant properties
B. Poorer resistance to alkalis
C. Poorer dyeability
D. All A , B. and C.
Pick out the exothermic reaction out of the following ?
A. C + H2O = CO + H2
B. CaC2 + H2O = Ca(OH)2 + C2H2
C. MgCO3 = MgO + CO2
D. All (A), B. and (C)
Oils are partially hydrogenated (not fully) to manufacture Vanaspati , because fully saturated solidified oils ?
A. Cause cholesterol build up and blood clotting
B. Are prone to rancid oxidation
C. Always contain some amount of nickel (as their complete removal is very difficult)
D. Have affinity to retain harmful sulphur compounds
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