Presence of excess fluorine in water causes__________________?

Related Mcqs:

The term Biological Oxygen Demand (BOD) is used in relation to ______________________?

A. Potable water B. Cooling water C. Distilled water D. Industrial effluents...

Which of the following is the most lethal water pollutant ?

A. Phenol and cyanide B. Chlorine C. Alkalis D. Suspended solids...

Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes__________________?

A. Blood poisoning B. Anaemia C. Nervous system disorder D. All A., B. & C....

Exposure to SO2 containing chimney gases results in the__________________?

A. Reduction in strength of leather & cloth B. Acceleration of corrosion rates of metals C. Increased drying & hardening time of paints D. All A., B. and C....

Thermal pollution due to excessive heat & temperature in the working place causes__________________?

A. Reduction in working efficiency of manpower B. Fatigue C. High breathing rate D. All A., B. & C....