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.Management Sciences
Category: Chemical Process
Rosin soap is added during paper manufacture to____________________?
0
A. Impart adhesive properties
B. Improve opacity
C. Impart resistance to penetration by liquids
D. None of these
High temperature carbonisation of coal takes place at __________________ °C?
A. 2000
B. 700
C. 1100
D. < 500
In the production of soda ash by Solvay process, the by-product is____________________?
A. CaCl2
B. NH4Cl
C. NH3
D. NaOH
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
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