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

Related Mcqs:

1. 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________________?

   A. Global warming
   B. Green house
   C. Atmospheric effect
   D. Ionosphere

2. In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (ζ) and thermal diffusivity (α). The units of these quantities are ?

   A. μ , α and θ all have units of m/s
   B. μ , α and θ all have units of m2/s
   C. α and θ have units of m2/s, while μ has unit of m/s
   D. α and θ have units of m/s, while μ has unit of m2/s

3. Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a _______________ calorimeter ?

   A. Bomb
   B. Throttling
   C. Junker’s
   D. Boy’s

4. Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture ______________ calorimeter is not used for measuring the dryness fraction of steam?

   A. Bomb
   B. Separating
   C. Bucket
   D. Throttling

5. Unit of mass velocity is___________________?

   A. kg/m.hr
   B. kg/m2.hr
   C. kg/hr
   D. kg/m2

6. 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

7. “The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances”. This is the_________________?

   A. Lewis-Randall rule
   B. Statement of Van’t Hoff Equation
   C. Le-Chatelier’s principle
   D. None of these

8. The total change in the enthalpy of a system is independent of the _______________________?

   A. Number of intermediate chemical reactions involved
   B. Pressure and temperature
   C. State of combination and aggregation in the beginning and at the end of the reaction
   D. None of these

9. For a single component two phase mixture, the number of independent variable properties are_________________?

   A. Two
   B. One
   C. Zero
   D. Three

10. In a binary liquid system, the composition expressed as _______________ is independent of the temperature & pressure?

    A. Kg of solute/kg of solvent
    B. Kg-mole of solute/kg-mole of solvent
    C. Kg-mole of solute/1000 kg of solvent
    D. All A., B. & C.