Hamad Environmental Chemistry 31/05/2024 A. chromium III B. chromium IV C. chromium V D. chromium VI Related Mcqs: Which of the following is a macro nutrient ?A. boron B. iron C. copper D. carbon... In the purification of portable water the coagulant used is_________________?A. alum B. nickel sulphate C. copper sulphate D. barium sulphate... Newspaper can be recycled again and again how many times ?A. 2 B. 3 C. 4 D. 5... The yellow colour in photochemical smog is due to presence of__________________?A. dinitrogen oxide B. nitrogen dioxide C. chlorine gas D. chlorine dioxide... Which of the following is not primary pollutant__________________?A. SO3 B. CO C. NO D. H2SO4...
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