The main use of activated carbon in water treatment is to control ___________________?
A. Bacterial growth
B. Taste and odour
C. Turbidity
D. None of these
Chemical Process
Separation of fresh water from sea water can be done by the _______________ operation ?
Separation of fresh water from sea water can be done by the _______________ operation ?
A. Osmosis
B. Reverse osmosis
C. Absorption
D. Adsorption
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like_________________?
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like_________________?
A. High cost
B. Fragile nature
C. Easy poisoning tendency
D. All A, B. and C.
Presence of H2S in raw water (to be chlorinated) results in the_____________________?
Presence of H2S in raw water (to be chlorinated) results in the_____________________?
A. Reduced softening capacity of zeolite
B. Increased dosage of chlorine to provide a disinfecting residual in the water
C. Easy removal of its hardness
D. None of these
______________ is an ore of lead?
______________ is an ore of lead?
A. Quartz
B. Galena
C. Siderite
D. Chalcopyrite
Hydrogen gas is not produced commercially (for nitrogenous fertiliser manufacture) by _____________________?
Hydrogen gas is not produced commercially (for nitrogenous fertiliser manufacture) by _____________________?
A. Iron-steam reaction
B. Electrolysis of water
C. Steam reforming of naphtha
D. Its cryogenic separation from coke oven gas
The most commonly used substance to speed up the sedimentation of sewage is___________________?
The most commonly used substance to speed up the sedimentation of sewage is___________________?
A. Lime
B. Sulphuric acid
C. Chlorine
D. Sodium bisulphite
Which of the following is not produced commercially from sea water ?
Which of the following is not produced commercially from sea water ?
A. Magnesium & potassium compounds
B. Common salt
C. Bromine
D. Iodine
Oleum produces fumes of_____________________?
Oleum produces fumes of_____________________?
A. SO2
B. H2SO4
C. SO3
D. SO2 + H2SO4
Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in______________________?
Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in______________________?
A. Pyrolysis of oil
B. Sintering of porous catalyst
C. Hydrogen embrittlement
D. All A, B. and C.