The main pollutant of leather tanneries in the waste water is____________________?

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...