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.Management Sciences
Category: Chemical Process
A good quality coal should have ______________________?
A. Low fusion point of ash
B. High ash content
C. High sulphur content
D. None of these
Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on ____________________?
A. Slaked lime
B. Soda lime
C. Calcium perchlorate
D. None of these
Finely ground calcium aluminate & silicate is a/an ____________________?
A. Cermet
B. Cement
C. Abrasive
D. Explosive
Glauber’s salt is chemically represented by____________________?
A. Na2SO4.10H2O
B. CaCl(OCl)
C. CaSO4.H2O
D. (NH4)2SO4
P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as____________________?
A. Bakelite
B. Neoprene
C. Teflon
D. Nylon-66
Systemic insecticides________________?
A. Are absorbed throughout the plant
B. Kill insects following external bodily contact
C. Are stomach poisons
D. Emit poisonous vapour
Celluloid is chemically___________________?
A. Cellulose acetate
B. Regenerated cellulose
C. Cellulose nitrate
D. Cellulose acetate butyrate
Lime and soda ash are added to water to remove ___________________?
A. Bicarbonates & sulphates of calcium and magnesium
B. Undesirable taste and odour
C. Bacteria
D. Its corrosiveness
Deaeration of water in its treatment is necessary, as it___________________?
A. Minimises its turbidity
B. Helps in controlling its taste and odour
C. Minimises its corrosiveness
D. None of these
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