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.Management Sciences
Category: Chemical Process
Calcination of gypsum produces__________________?
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A. Plaster of Paris
B. Salt cake
C. Nitre cake
D. Lime
The end bleaching agent used to move last traces of colour bodies from the pulp is ____________________?
A. Chlorine dioxide (ClO2)
B. MgO
C. SO2 gas
D. Mercaptans
Cation exchanger is regenerated usually with_________________________?
A. NaOH
B. H2SO4
C. Hydrazine
D. Alum solution
Hydrazine is used in water treatment for the removal of___________________?
A. Colloidal impurities
B. Dissolved oxygen
C. Turbidity
D. Chlorinous taste
Average sulphur content in Indian pyrites is about _________________ percent?
A. 15
B. 35
C. 55
D. 70
Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the _____________ process?
A. Mechanical
B. Sulphate/Kraft
C. Sulphite
D. Neutral sulphite semi-chemical
Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is ______________ °C?
A. 25
B. 60-70
C. 150-200
D. 250-300
The biochemical treatment applied to sewage effluents is a process of__________________?
A. Dehydration
B. Reduction
C. Oxidation
D. Polymerisation
Which of the following is not present in bagasse fibre ?
A. Cellulose
B. Lignin
C. Pentogens
D. None of these
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