A. BOD much higher than COD
B. BOD slightly higher than COD
C. COD slightly higher than BOD
D. COD much higher than BOD
Pollution
Pollution
A. Caesium oxide deposition
B. Control of diesel
C. Chemistry of depositions
D. Chemical oxygen demand
A. Thousands
B. Hundreds
C. Billion
D. Millions
A. Acidity
B. Metal toxicity
C. Aridity
D. Salinity
A. Always an unfavourble alteration
B. Always a favourable change
C. Rarely a favoruable alteration
D. Usually an unfavourable change
A. Gamma rays (from cobalt 60)
B. X-rays
C. UV (260 nm)
D. Alpha particles
A. 89%
B. 93%
C. 97%
D. 86%
A. Production of cereals
B. Trapping of UV rays
C. Cooling of earth
D. Warming of earth
A. Peroxy acetyl nitrate
B. Peroxy acyl nitrite
C. Pyridine aceto-nitrite
D. Peroxy aceto-nitrile
A. Industrial waste
B. Oil spills
C. Death of marine fauna
D. None of these