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

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. Global warming may result in __________________?

   A. Flood
   B. Cyclone
   C. Decrease in food productivity
   D. All A., B. and C.

3. Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan_________________?

   A. With greater number of blades
   B. Of increased diameter
   C. Both A. & B.
   D. Neither A. nor B.

4. The resistance of water to the passage of light through it is a measure of the___________________?

   A. Turbidity
   B. Color
   C. Hardness
   D. Dissolved gases

5. The material used for coating the welding electrode is termed as the___________________?

   A. Flux
   B. Slag
   C. Protective layer
   D. Binder

6. Raoult’s law is not applicable to the___________________?

   A. Solutes which dissociate or associate in the particular solution
   B. Concentrated solutions
   C. Both B. & C.
   D. Solutions containing non-volatile solute

7. In osmosis through a semi-permeable membrane, diffusion of the___________________?

   A. Solvent is from low concentration to high concentration region
   B. Solvent is from high concentration to low concentration region
   C. Solute takes place
   D. None of these

8. Assuming applicability of ideal gas law, the pure component volume of the vapor in a saturated gas can be calculated from theoretical relationship. The volumetric composition of a vapor saturated gas is independent of the___________________?

   A. Nature of the liquid
   B. Nature of the gas
   C. Temperature of the liquid
   D. Total pressure

9. Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly _____________ substances?

   A. Radioactive
   B. Organic
   C. Inorganic
   D. None of these

10. Lagooning process is mainly a means of the__________________?

    A. Sludge disposal
    B. Reduction of excessive flow in sewers
    C. Biological treatment of wastes
    D. None of these