Global warming may result in __________________?

Related Mcqs:

1. Green house gases blanket/block the infrared radiation from earth’s surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect ?

   A. CO2
   B. H2
   C. SO3
   D. N2

2. The progressive warming up of the earth’s surface is mainly due to the___________________?

   A. Automobile exhaust
   B. Blanketing effect of CO2 in the atmosphere
   C. De-forestation
   D. Thickening of ozone layer

3. On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because __________________?

   A. Of clotting of blood
   B. Of jamming of respiratory tract
   C. It forms carboxyhemoglobin by combining with haemoglobin of blood, thereby making it
   incapable of absorbing oxygen
   D. It forms CO2 by combining with oxygen present in the blood

4. Noise pollution level in a chemical plant is expressed in __________________?

   A. Roentgen
   B. Decibel
   C. Hertz
   D. None of these

5. The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the __________________?

   A. Bacterial stability factor
   B. Relative stability
   C. Biological oxygen demand (BOD)
   D. Oxygen ion concentration

6. Presence of high concentration of ozone and smog in atmospheric air causes the __________________?

   A. Embrittlement & decrease of folding resistance of paper
   B. Cracking of rubber products
   C. Fading of dye on textiles
   D. Damage of electrical insulator on high tension power line

7. In water treatment, alum [Al2(SO4)3] is used for the process of __________________?

   A. Filtration
   B. Coagulation
   C. Sedimentation
   D. Disinfection

8. Iron & manganese present in the polluted water is removed by __________________?

   A. Simple filtration
   B. Oxidation followed by settling & filtration
   C. Chemical coagulation
   D. Chlorination only

9. COD of raw municipal sewage may be in the range of about _____________ mg/litre?

   A. 1-2
   B. 5-10
   C. 90-120
   D. 1500-2500

10. A man exposed to excessive noise level in the working environment may suffer from____________________?

    A. Hearing loss
    B. Rupture of ear drum
    C. Nervousness & fatigue
    D. All A., B. & C.