A. Arizona (U.S.A.)
B. Chernobyl (undivided U.S.S.R.)
C. Pennsylvania (U.S.A.)
D. Moscow (U.S.S.R.)
Related Mcqs:
- Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters ?
A. I-131
B. Sr-90
C. Au-198
D. Ra-226 - Radioactive solid nuclear wastes are disposed off by _________________?
A. High temperature incineration
B. Pathological incineration
C. Pyrolysis
D. Underground burial in concrete containers - Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called________________?
A. Thermosphere
B. Stratosphere
C. Troposphere
D. Mesosphere - Which of the following is not a practical method of low level radioactive waste disposal ?
A. Dilution with inert material
B. Discharging to atmosphere through tall stacks after dilution
C. Disposing off in rivers & oceans
D. Filling in steel crates and shooting it off out of earth’s gravity - Radioactive substances present in the polluted water stream can be removed by_________________?
A. Biological oxygen treatment
B. Coagulation and filtration
C. Adsorption in ion exchange materials
D. None of these - What are the methods of treatment & disposal of radioactive wastes ?
A. Evaporation & chemical precipitation
B. Biological methods & adsorption in ion exchange materials
C. Fixing into a solid mass with cement and sinking deep in the sea
D. All A., B. & C. - Which of the following is a manmade source of air pollution ?
A. Automobile exhaust
B. Forest fire
C. Bacterial action in soil and swamp areas
D. All A., B. and C. - Which of the following is not a natural source of air pollution ?
A. Volcanic eruptions and lightening discharges
B. Biological decay of vegetable matter
C. Photochemical oxidation of organic matter
D. None of these - Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of _____________ present in it?
A. Coal ash
B. Potassium cyanide
C. Ortho-xylene
D. None of these - Which of the following acts as a natural source of air pollution ?
A. Forest fire
B. Deforestation
C. Volcanic eruption
D. None of these
