A. Gaseous
B. Mainly gaseous
C. Non-gaseous
D. Mainly non-gaseous
Pollution
Pollution
A. Phosphene
B. SiF4
C. Dust
D. Halogens
A. Pb, Hg, Cr, Cd
B. P,Mn,B,Mg
C. N,K,Mo
D. Zn,Mo,Mg,Ag
A. Cell membranes
B. DNA
C. Mitochondria and ribosomes
D. Nucleus
A. SO2
B. CO
C. CO2
D. NO2
A. Stockholm
B. Paris
C. London
D. Tokyo
A. CO
B. SO2
C. O2
D. NO
A. Sewage
B. Plastic
C. Polythene
D. DDT
A. Smoke filters
B. Ringelmann’s charts
C. Horizontal microscopes
D. All of these
A. SO2 and SO3
B. SO2 and oxides of nitrogen
C. Hydrocarbons and N2O
D. Suspended particulate matter