The first nuclear explosion over the city of Hiroshima took place in 1945 on:

Related Mcqs:

1. The first nuclear explosion was conducted by USA in:

   A. Jun-44
   B. Sep-44
   C. Jul-45
   D. Aug-45

2. Keeping the frequency of nuclear tests, it is estimated that on an average the five nuclear powers conducted nuclear tests at the rate of:

   A. One test every 20th day
   B. One test every 13th day
   C. One test every 11th day
   D. One test every 9th day

3. The nuclear installation should be at a place where there is no inhabitation atleast within:

   A. 2 km
   B. 4 km
   C. 8 km
   D. 10 km

4. The first nuclear reactor disaster occurred at:

   A. Chernobyl
   B. TMI-2
   C. Narora
   D. Trombay

5. The following radioactive isotopes are formed by nuclear fission:

   A. Sr90, I131
   B. Cr51, Cu64
   C. Zr95, Mn54
   D. All of these

6. Exposure of human beings to high energy from nuclear power plants can cause:

   A. Cancer of skin and bone
   B. Cancer of heart and brain
   C. Cancer of skin and bone marrow
   D. Cancer of kidneys

7. The primary nuclear fuel used in the atom today is:

   A. Uranium-234
   B. Uranium-235
   C. Uranium-236
   D. Uranium-237

8. Chollistan Desert located near the city:

   A. Multan
   B. Bahawalpur
   C. Sahiwal
   D. Rawalpindi

9. Biological Oxygen Demand (BOD) is a measure of:

   A. Industrial wastes poured into water bodies
   B. Extent to which water is polluted with organic compounds
   C. Amount of carbon monoxide inseparably combined with haemoglobin
   D. Amount of oxygen needed by green plants during night

10. Aerosols reduce primary productivity by:

    A. Decreasing O2
    B. Reducing photosynthesis
    C. Competing with CO2
    D. Being toxic to chloroplasts