Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of_________________?

Related Mcqs:

Which of the following is not a weightless pollutant ?

A. SPM B. Thermal pollution C. Radioactive rays D. Noise pollution...

Which of the following is the most lethal water pollutant ?

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

‘Pneumoconiosis’ is a disease caused by the inhalation of ______________ dust?

A. Coal B. Uranium ore C. Iron ore D. Lime...

The earth’s atmosphere is an envelope of gases present upto a height of about ______________ kms?

A. 10 B. 200 C. 1000 D. 2000...

Pick out the wrong statement ?

A. The concentric atmosphere layer just above troposphere is called stratosphere, which is rich in ozone B. Mesosphere is characterised by very low atmospheric pressure and low temperature C. Troposphere is a dusty zone containing water vapor and clouds D. The radio waves used in the long distance radio communication are reflected back to earth … Pick out the wrong statement ?Read More...