Which is the main reducing agent during production of iron from iron ore in a blast furnace ?
(A) C
(B) CO
(C) CO2
(D) H2
Bromides contained in hot mother liquor is treated with ______________ during manufacture of bromine from sea water ?
(A) SO3
(B) Cl2
(C) NH3
(D) SO2
Process conditions in fermentator used for production of penicillin is____________________?
(A) 25°C, 2 atm
(B) 50°C, l0 atm
(C) 30°C, 200 mm Hg (absolute)
(D) 90°C, 45 atm
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
Air used in aerobic fermentation must be sterilized, otherwise the ___________________?
(A) Recovery of product will be difficult
(B) Contamination of pure culture would result
(C) Uniformity of product cannot be achieved
(D) None of these
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used_______________________?
(A) As a lubricant
(B) As a rust preventive
(C) In hard water for cleaning of cloth
(D) As a foam depressant in distillation column
Prussian blue is chemically represented by__________________?
(A) FeO.TiO2
(B) Ca SO4 . 2H2O
(C) Fe4 [Fe (CN6)3]
(D) AlF3 . 3NaF
Molasses is the starting material for the production of ___________________ ?
(A) Alcohol
(B) Essential oil
(C) Fatty acids
(D) Massecuite
Insulin is an __________________ drug?
(A) Anti-malarial
(B) Anti-TB
(C) Antibiotic
(D) None of these
Solvay process as compared to dual process (i.e. modified Solvay process) ?
(A) Can use low grade brine
(B) Has less corrosion problems
(C) Involves higher investment in NH3 recovery units than that for crystallisation units for NH4Cl
(D) Both