The widest explosive limit is of _____________, thereby making it the most explosive gas?

Related Mcqs:

1. Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gasair mixture), rendering it the property of the most explosive gas ?

   A. Hydrogen
   B. Acetylene
   C. Carbon monoxide
   D. Ammonia

2. 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?

   A. < 1
   B. 10-100
   C. 100-200
   D. 100-1000

3. ‘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

4. Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at which it acts as a natural asphyxiate is ≥ _____________ percent?

   A. 84
   B. 88
   C. 80
   D. 92

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

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

6. Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air’s water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes_________________?

   A. Poor visibility due to sky darkening
   B. Irritation in eyes
   C. Respiratory trouble
   D. All A., B. and C.

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

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

9. Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is _____________ decibels?

   A. 35
   B. 75
   C. 95
   D. 105

10. Tolerable limit of nitrogen oxides in air is _____________ ppm?

    A. 0.1
    B. 1
    C. 5
    D. 25