TLV of mercury in potable (drinking) water is about ______________ ppm?

Related Mcqs:

Global warming may result in __________________?

A. Flood B. Cyclone C. Decrease in food productivity D. All A., B. and C....

Particles having diameter greater than 75 μm (micrometer = 10-6 mm) are called__________________?

A. Grit B. Dust C. Powder D. Smoke...

A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of _____________ high above earth’s atmosphere, which absorbs it?

A. Hydrogen B. Carbon dioxide C. Ozone D. None of these...

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....