Which of the following is most poisonous?

Related Mcqs:

1. Carbon monoxide is a poisonous gas, 1% of which in the air can kill a person in:

   A. No time
   B. In ten minutes
   C. In five minutes
   D. In fifteen minutes

2. Which of the following does not cause pollution?

   A. CO2
   B. SO2
   C. H2
   D. CO

3. Biological control component is central to advanced agriculture production. Which of the following is used as a third generation pesticide?

   A. Pathogens
   B. Pheromones
   C. Insect repellant
   D. Insect hormone analogue

4. Which of the following is the use of lichens in case of pollution?

   A. They treat the polluted water
   B. They act as bio-indicators of pollution
   C. They promote pollution
   D. Lichens are not related with pollution

5. A hydrocarbon having the following number of carbon atoms doesn’t exist freely in the atmosphere:

   A. C16
   B. C18
   C. Both (a) & (b)
   D. C10

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

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

7. The automobile emission can be reduced by adding the following in the petrol:

   A. Calcium salts
   B. Cobalt salts
   C. Silicon oil
   D. Barium salts

8. Which of the following is not a commonly used pesticide?

   A. Aldrin
   B. Lindane
   C. Chlordane
   D. Chloremphenicol

9. Which of the following is not used for disinfection of drinking water?

   A. Chlorine
   B. Chloramines
   C. Phenyl
   D. Ozone

10. Which of the following enhances BOD of water?

    A. Algae
    B. Sand
    C. Moss
    D. Sugar mill effluents