A ‘body’ which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the________________?

Related Mcqs:

1. The escape velocity of a body on earth which is independent of its mass is about ______________________ km/second?

   A. 3
   B. 7
   C. 11
   D. 15

2. A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of _____________ high above earth’s atmosphere, which absorbs it?

   A. Hydrogen
   B. Carbon dioxide
   C. Ozone
   D. None of these

3. 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

4. For the gaseous phase chemical reaction, C2H4(g) + H2O(g) ↔ C2H5OH(g), the equilibrium conversion does not depend on the________________?

   A. Steam to ethylene ratio
   B. Temperature
   C. Pressure
   D. None of these

5. Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in___________________?

   A. Food industry
   B. Municipal sewage treatment
   C. Petroleum refinery
   D. Iron & steel plant

6. In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the________________?

   A. Total pressure
   B. Absolute humidity at a given temperature
   C. Both A. and B.
   D. Neither A. nor B.

7. Presence of dissolved impurities of ______________ is responsible for the red brownish color of water?

   A. Carbonates
   B. Bi-carbonates
   C. Iron & manganese
   D. Arsenic

8. A long cylinder and a sphere both of 5 cms diameter are made from the same porous material. The flat ends of cylinder are sealed. Both the cylinder and sphere are saturated with the same solution of sodium chloride. Later both the objects are immersed for a short and equal interval of time in a large tank of water which is well agitated. The fraction of salt remaining in the cylinder and the sphere are Xc and Xs respectively. Which of the following statement is correct ?

   A. Xc > Xs
   B. Xc = Xs
   C. Xc < Xs
   D. Xc greater/less than Xs depending on the length of the cylinder

9. The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is____________________?

   A. More
   B. Equal
   C. Less
   D. Double

10. The internal energy of an ideal gas does not change in a reversible _____________ process?

    A. Isothermal
    B. Adiabatic
    C. Isobaric
    D. Isometric