The pH value of potable water should be between____________________?

Related Mcqs:

Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by _____________________?

A. Chemical coagulation B. Floatation & skimming C. Centrifugation D. Ultra filtration...

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...

What are the methods of treatment & disposal of radioactive wastes ?

A. Evaporation & chemical precipitation B. Biological methods & adsorption in ion exchange materials C. Fixing into a solid mass with cement and sinking deep in the sea D. All A., B. & C....

Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes________________?

A. Fading of dyes on textiles B. Corrosion, tarnishing & soiling of metals C. Reduced strength of textiles D. All A., B. and C....