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.Management Sciences
Category: Chemical Process
Sodium carbonate (soda ash) is not used in the manufacture of___________________?
A. Fire extinguishers
B. Sugar
C. Baking powder
D. Detergents
Phthalic anhydride is used____________________?
A. In making PVC
B. As plasticisers
C. In insecticides manufacture
D. For making nylon-6
Enzymes are_________________?
A. Proteins with high molecular weight (around 10,000)
B. Derived from living organisms
C. Catalyst for temperature sensitive reactions
D. All A, B. and C.
In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 ⇌ 2SO3), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to SO3 can be increased by ?
A. Increasing the oxygen concentration
B. Putting more quantity of V2O5 catalyst in the converter
C. Removing some quantity of SO3 during intermediate stage
D. Maintaining low temperature & pressure in the converter
Which of the following is used as a coagulant in treating turbid water ?
A. Chlorine
B. Ferric sulphate
C. Calcium sulphate
D. Activated carbon
Fusion of bauxite and ________________ produces high alumina cement?
A. Alum
B. Limestone
C. Coke
D. Quartz
The function of gypsum addition during cement making is to_________________?
A. Increase the density of cement
B. Decrease the cement setting rate
C. Both A. and B.
D. Neither A. nor B.
Terylene is__________________?
A. Same as Dacron
B. A polyester
C. Both A. & B.
D. Neither A. nor B.
The major use of butadiene is____________________?
A. As a plasticiser for unsaturated polyester
B. In the manufacture of synthetic rubber
C. As an anti-skinning agent in paint
D. None of these
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