Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in ‘gas chamber’ is about ______________ ppm?

Related Mcqs:

1. Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about ______________ ppm (parts per million)?

   A. 0.002
   B. 0.2
   C. 1.2
   D. 4.8

2. ‘Safe limit’ called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the____________________?

   A. Industrial chimney exhaust
   B. Automobiles exhaust
   C. Photochemical reaction in polluted atmosphere
   D. Burning of domestic fuel

3. Permissible safe limit (TLV) of _____________ toxic gas is 100-1000 parts per million (ppm)?

   A. Highly
   B. Moderately
   C. Extremely
   D. Very extremely

4. Threshold limit value (TLV) of CO in air is _____________ ppm?

   A. 5
   B. 50
   C. 2000
   D. 5000

5. A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from ______________ ppm?

   A. 1000 to 2000
   B. 3000 to 6000
   C. 6000 to 9000
   D. 10000 to 100000

6. TLV of ozone (O3) and phosgene (COCl2) in air is _______________ ppm?

   A. 0.1
   B. 25
   C. 100
   D. 1000

7. Methyl isocyanate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of ______________ toxic gas?

   A. Moderately
   B. Highly
   C. Extremely
   D. Very extremely

8. Out of the following, TLV of _______________ is maximum (about 500 ppm)?

   A. Carbon dioxide
   B. Toluene
   C. Carbon disulphide
   D. Acetaldehyde

9. TLV of mercury in potable (drinking) water is about ______________ ppm?

   A. 0.001
   B. 0.1
   C. 1
   D. 5

10. TLV of lead for public sewer/waste water is about ______________ ppm?

    A. 1
    B. 25
    C. 150
    D. 650