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.Management Sciences
Category: Chemical Process
Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo ?
A. Depithing
B. Digestion
C. Bleaching
D. None of these
DDT stands for___________________?
A. Diethyl-diphenyl-trichloromethane
B. Dichloro-diphenyl-trichloromethane
C. diphenyl-dichloro-trichloromethane
D. Dichloro-diphenyl-trichloroethane
Which of the following is not a food additive ?
A. Citric acid
B. Invertage
C. Benzoyl peroxide
D. Ammonium chloride
Soap cannot be used with hard water, because _________________?
A. Hard water contains sulphate
B. They form insoluble calcium soaps which precipitate
C. They attract back the removed dirt
D. None of these
How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln ?
A. 500°C
B. 750°C
C. 1000°C
D. 1500°C
Which of the following contains least amount of N2 ?
A. Coke oven gas
B. Blast furnace gas
C. Producer gas
D. Water gas (blue gas)
Saponification number of an oil or fat____________________?
A. Gives an idea about its molecular weight
B. Is inversely proportional to its molecular weight
C. Detects its adulteration
D. All A , B. & C.
High purity nitrogen is used in__________________?
A. Making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils
B. Fire fighting purposes
C. Both A. & B.
D. Neither A. nor (B)
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