Pick out the one which is not a chemical coagulant ?

Related Mcqs:

Pick out the wrong statement ?

A. Low ozone layer thickness in polar regions is due to cold climatic conditions B. Amount of unburnt hydrocarbons emitted by two stroke petrol engine is more as compared to that emitted by a four stroke engine C. Carbon monoxide present in the two stroke petrol engine exhaust is much less as compared to that … Pick out the wrong statement ?Read More...

Pick out the wrong statement?

A. Benzopyrene which causes cancer is present in traces in tobacco, charcoal & petrol driven automobile exhaust B. NO2 is capable of penetrating the troposphere and can absorb both ultraviolet & visible light C. Hydrocarbon pollutants are produced by sweet gum, oak & natural rubber trees D. H2S is not at all produced during combustion … Pick out the wrong statement?Read More...

Noise level inside a jet airliner in normal flight is about ______________ decibels?

A. 80 B. 100 C. 125 D. 150...

Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of _____________ present in it?

A. Coal ash B. Potassium cyanide C. Ortho-xylene D. None of these...

Dissolved oxygen content in river water is around _____________ ppm?

A. 5 B. 100 C. 250 D. 500...