World’s worst radioactive pollution was caused by nuclear reactor disaster which occured in ___________________?

Related Mcqs:

1. 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...

2. Radioactive solid nuclear wastes are disposed off by _________________?

   A. High temperature incineration B. Pathological incineration C. Pyrolysis D. Underground burial in concrete containers...

3. 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...

4. 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...

5. 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...

6. 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....

7. 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....

8. 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...

9. 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...

10. Which of the following acts as a natural source of air pollution ?

    A. Forest fire B. Deforestation C. Volcanic eruption D. None of these...