A. 1933
B. 1943
C. 1953
D. 1963
Pollution
Pollution
A. CFC, CH4 and SO2
B. Sulphates of Na, Ca and Fe
C. Fly ash
D. All of these
A. Photochemical smog
B. Dry acid deposition
C. Industrial smog
D. Wet acid deposition
A. Degradation of marble due to high temperature
B. Air pollution released from oil refinery
C. Riparian erosion
D. Discharge of industrial waste in Yamuna river
A. Shock waves
B. Noise of traffic
C. Noise of siren
D. Unhearable sound
A. Chlorides
B. Cyanides
C. Fluorides
D. Nitrates
A. One test every 20th day
B. One test every 13th day
C. One test every 11th day
D. One test every 9th day
A. Riccinus communis
B. Iberis amara
C. Cynodon dactylon
D. All of these
A. Sr90, I131
B. Cr51, Cu64
C. Zr95, Mn54
D. All of these
A. Eichhornia crassipes
B. Escherichia coli
C. Entamoeba histolytica
D. Lemna pancicostata