A. Colloidal impurities
B. Dissolved oxygen
C. Turbidity
D. Chlorinous taste
Related Mcqs:
- Hydrazine (N2H4) is used mainly as a/an__________________?
A. Explosive
B. Rocket fuel
C. Detergents additive
D. None of these - Main use of hydrazine is___________________?
A. As a rocket fuel
B. In water treatment
C. As a disinfectant
D. As fire retardant - Hydrazine is largely used____________________?
A. As a starting material for ‘hypo’
B. In photographic industry
C. As rocket fuel
D. In printing industry - Most widely and commonly used coagulant for the removal of suspended impurities in water is __________________?
A. Bleaching powder
B. Slaked lime
C. Alum
D. Copper sulphate - 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 - Pick out the false statement pertaining to water treatment ?
A. Aeration of water is effective in CO2 removal
B. The zeolite water softening process reduces the hardness of water by not more than 50%
C. Sodium sulphate or sodium carbonate do not cause hardness in water
D. Water with pH value less than 7, is acidic - Pick out the true statement pertaining to water treatment ?
A. Slow sand filters can remove colour completely
B. Activated carbon can be used for taste & odour control without subsequent filtration
C. Application of activated carbon reduces the temporary hardness of water
D. Normally, the turbidity is removed by adding a coagulant prior to sedimentation - Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove____________________?
A. Colour
B. Turbidity
C. Bacteria
D. All A , B. and C. - Calgon used in water treatment is chemically ____________________?
A. Sodium phosphate
B. Sodium hexametaphosphate
C. Calcium phosphate
D. Tricresyl phosphate - Which of the following is used as a coagulant in water treatment ?
A. Chloramine
B. Chlorine
C. Ferrous sulphate
D. Hydrogen peroxide
