There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant ?
A. Mercury
B. Arsenic
C. Aluminium
D. Lead
Related Questions on Chemical Environmental Engineering Mcqs
A. Of clotting of blood
B. Of jamming of respiratory tract
C. It forms carboxyhemoglobin by combining with haemoglobin of blood, thereby making it incapable of absorbing oxygen
D. It forms CO2 by combining with oxygen present in the blood
In water treatment plant, zeolite process is used to remove the _____________ of water?
A. Acidity
B. Alkalinity
C. Hardness
D. Iron & zinc
Disinfection of water is done to remove ______________________?
A. Color
B. Bad taste
C. Foul odour
D. Bacteria
The average thickness of ozone layer in stratosphere is about _______________ dobson unit (DU)?
A. 20
B. 230
C. 750
D. 1500