Sucrose content in cane sugar may be around ______________________ percent ?
A. 50
B. 70
C. 95
D. 80
Chemical Process
Use of hydrated lime in water treatment_________________?
Use of hydrated lime in water treatment_________________?
A. Before filtration, reduces the bacterial load on filters
B. After filtration, combats the corrosiveness of water due to the presence of O2 & CO2
C. Is to adjust the pH value
D. All A , B. and C.
Grignard reagent is chemically known as ____________________?
Grignard reagent is chemically known as ____________________?
A. Ethyl magnesium chloride
B. Methyl magnesium chloride
C. Dichlorophenol
D. Monochloroacetic acid
Raw materials required for the manufacture of __________________ is acetylene and hydrochloric acid?
Raw materials required for the manufacture of __________________ is acetylene and hydrochloric acid?
A. Phthalic anhydride
B. Vinyl chloride
C. Maleic anhydride
D. Dacron
Parathion and Malathion are _____________________?
Parathion and Malathion are _____________________?
A. Pesticides
B. Plasticisers for unsaturated polyesters
C. Pain-relieving drugs (analgesic)
D. Tranquilisers
Which of the following is not produced on commercial scale from sea water ?
Which of the following is not produced on commercial scale from sea water ?
A. Bromine
B. Magnesium compounds
C. Potassium compounds
D. Sodium sulphate
Glycerine can be obtained from ________________ ?
Glycerine can be obtained from ________________ ?
A. Fat
B. Naphthalene
C. Cumene
D. Sucrose
Permanent hardness of water is due to the presence of calcium & magnesium __________________?
Permanent hardness of water is due to the presence of calcium & magnesium __________________?
A. Bi-carbonates
B. Sulphates & chlorides
C. Carbonate
D. None of these
Deaeration of water in its treatment is necessary, as it___________________?
Deaeration of water in its treatment is necessary, as it___________________?
A. Minimises its turbidity
B. Helps in controlling its taste and odour
C. Minimises its corrosiveness
D. None of these
Use of water having dissolved oxygen in boilers promotes___________________?
Use of water having dissolved oxygen in boilers promotes___________________?
A. Corrosion
B. Sequestration
C. Scale formation
D. None of these