Hamad Chemical Environmental Engineering 14/12/2021 A. 10-7 B. 7 × 10-7 C. 107 D. 7 × 107 Related Mcqs: Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate ?A. CO B. SO2 C. NOx D. CFC (chloro fluoro carbons)... A standard test for determination of hardness in water is termed as ______________ test?A. EDTA B. Electometric C. Total count D. Presumptive... Iron & manganese present as pollutant in water cannot be removed by__________________?A. Ion exchange process B. Oxidation followed by settling & filtration C. Lime soda process or manganese zeolite process D. Chlorination... World environment day is observed every year on the 5th of___________________?A. June B. December C. July D. September... Which of the following is an adsorbent used for the removal of SO2 from gas/air ?A. Bog iron B. Limestone powder or alkalised alumina C. Silica gel D. Active carbon...
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