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  • Question
  • The Killer gas which caused Bhopal gas tragedy in 1984 was


  • Options
  • A. phosgene
  • B. methyl iso-cynate (MIC)
  • C. carbon monoxide
  • D. sulphur dioxide

  • Correct Answer
  • methyl iso-cynate (MIC) 


  • Environmental Engineering problems


    Search Results


    • 1. In water treatment plant, zeolite process is used to remove the __________ of water.

    • Options
    • A. acidity
    • B. alkalinity
    • C. hardness
    • D. iron & zinc
    • Discuss
    • 2. As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ ?g/m3.(?g-microgram)

    • Options
    • A. 10
    • B. 90
    • C. 800
    • D. 750
    • Discuss
    • 3. Pick out the wrong statement

    • Options
    • A. Low ozone layer thickness in polar regions is due to cold climatic conditions
    • B. Amount of unburnt hydrocarbons emitted by two stroke petrol engine is more as compared to that emitted by a four stroke engine.
    • C. Carbon monoxide present in the two stroke petrol engine exhaust is much less as compared to that emitted from a four stroke engine.
    • D. Mercury as a pollutant can enter the blood stream & the digestive system/ lungs and is responsible for causing minamate disease.
    • Discuss
    • 4. The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the

    • Options
    • A. catalytic conversion
    • B. green house effect
    • C. global warming
    • D. both (b) and (c)
    • Discuss
    • 5. Ozone is

    • Options
    • A. a primary pollutant.
    • B. a secondary pollutant.
    • C. impervious to ultra-violet rays.
    • D. both (b) and (c)
    • Discuss
    • 6. Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is

    • Options
    • A. neutralised by alkali treatment.
    • B. left as such without any treatment.
    • C. diluted with fresh water to reduce its acidity.
    • D. none of these.
    • Discuss
    • 7. Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of

    • Options
    • A. CO2
    • B. SO2
    • C. hydrocarbons
    • D. CFC (chloro fluoro carbon)
    • Discuss
    • 8. Ethanolamine is an absorbant used for the removal of __________ from air/gas.

    • Options
    • A. HF
    • B. SO2
    • C. H2S
    • D. both (b) & (c)
    • Discuss
    • 9. The lowest layer of atmosphere is known as the

    • Options
    • A. stratosphere
    • B. troposphere
    • C. ionosphere
    • D. none of these
    • Discuss
    • 10. The progressive warming up of the earth's surface is mainly due to the

    • Options
    • A. automobile exhaust.
    • B. blanketing effect of CO2 in the atmosphere.
    • C. de-forestation.
    • D. thickening of ozone layer.
    • Discuss


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