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.Management Sciences
Category: Chemical Process
The most widely used coagulant for removing suspended impurities from water is__________________?
A. Bleaching powder
B. Chlorine
C. Calcium sulphate
D. Alum
Function of thinner in a paint is to ______________________ ?
A. Accelerate the oxidation of oil
B. Prevent gelling of the paint
C. Suspend pigments & dissolve film forming materials
D. Form a protective film
Fermentation is adversely affected by the____________________?
A. Presence of air
B. Absence of air
C. High concentration
D. Presence of ammonium salts
Paper pulp produced by Kraft/sulphate process is__________________ ?
A. Bleached easily
B. Dull white in color
C. Strong fibrous
D. Dark colored
____________________ is a thermosetting plastic ?
A. Polythene
B. Epoxy polymer
C. P.V.C.
D. Polystyrene
Portland cement consists mainly of__________________?
A. CaO & SiO2
B. SiO2 & Al2O3
C. CaO & Al2O3
D. CaO & Fe2O3
Reverse osmosis is normally used for the_______________?
A. Separation of isotopes of uranium from gaseous uranium hexafluoride
B. Separation of helium from natural gas
C. Desalination of brackish water to produce potable (drinking) water
D. Purification of oxygen
A substance produced by a living organism and capable of anti-microbial activity is called a/an < ____________________?
strong>A. Antibiotic
B. Antiseptic
C. Disinfectant
D. None of these
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