A. Carbonate
B. Calcium
C. Chloride
D. Sulphate
Related Mcqs:
- Which of the following hardness tests does not measure the indentation hardness of metals and alloys ?
A. Vickers hardness test
B. Shore scleroscope test
C. Brinell hardness test
D. Rockwell hardness test - Presence of dissolved impurities of ______________ is responsible for the red brownish color of water?
A. Carbonates
B. Bi-carbonates
C. Iron & manganese
D. Arsenic - A standard test for determination of hardness in water is termed as ______________ test?
A. EDTA
B. Electometric
C. Total count
D. Presumptive - Presence of _____________ bacteria in water causes disease like typhoid?
A. Aerobic
B. Pathogenic
C. Anaerobic
D. Non-pathogenic - Fluorosis is caused due to the presence of excessive amount of ______________ in drinking water?
A. Mercury
B. Lead
C. Fluoride
D. Arsenic - Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes_______________?
A. Foaming
B. Odour nuisances
C. Undesirable plant growth
D. Turbidity - Turbidity of water is an indication of the presence of__________________?
A. Suspended inorganic matter
B. Dissolved solids
C. Floating solids
D. Dissolved gases - Presence of excess fluorine in water causes__________________?
A. Dental cavity
B. Tooth decay
C. Fluorosis
D. Respiratory disease - Presence of ____________ in water stream are deleterious to aquatic life?
A. Soluble and toxic organics
B. Suspended solids
C. Heavy metals and cyanides
D. All A., B. & C. - The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant ?
A. Chlorine
B. Alkalis
C. Benzene hexachloride
D. Alkyl benzene sulphonate (ABS)
