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.Management Sciences
Category: Chemical Process
Low purity oxygen is used for____________________?
A. L.D. steel making
B. Cutting and welding of metals
C. Medicinal purposes
D. Chemical oxidation processes
Nickel is not used as a catalyst in the____________________?
A. Fischer-Tropsch process
B. Shift conversion
C. Hydrogenation of oil
D. Ostwald’s process of HNO3 manufacture
Use of water having dissolved oxygen in boilers promotes___________________?
A. Corrosion
B. Sequestration
C. Scale formation
D. None of these
The purpose of adding Na2CO3 to water of low alkalinity is to__________________?
A. Permit the use of alum as a coagulant
B. Increase the softening capacity of zeolite
C. Facilitate easy regeneration of zeolite
D. All A , B. and C.
Molecular weight of plastics ranges from ______________________?
A. 5000 to 10000
B. 20000 to 250000
C. 500 to 5000
D. 106 to 109
Which of the following is not produced on commercial scale from sea water ?
A. Bromine
B. Magnesium compounds
C. Potassium compounds
D. Sodium sulphate
Wood charcoal is used for decolouration of sugar, because it _______________ the coloured materials?
A. Adsorbs
B. Oxidises
C. Reduces
D. Converts
Sucrose is a__________________?
A. Monosaccharide
B. Disaccharide
C. Polysaccharide
D. None of these
Esterification reaction___________________?
A. Produces soap
B. Is reversible
C. Is a reaction between an alcohol and an organic acid
D. All A, B. and C.
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