The mixing up of two gases as a result of random motion of molecules is called

A. diffusion

B. effusion

C. vaporisation

D. sublimation

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. The period of oscillation of a simple pendulum depends upon
  2. The speed of sound in air at 0° C is approximately
  3. A cyclist leans inwards when he is negotiating a curve 10 that
  4. The mixing up of two gases as a result of random motion of molecules is called
  5. The radius of curvature of a spherical mirror is
  6. We see the sun before it actually rises on the horizon. This is due to
  7. When a body is partly or wholly immersed in a liquid the apparent loss of weight is equal to the weight…
  8. A proton is
  9. When we tighten the string of a sitar or tanpura its pitch
  10. Mercury is used in a barometer because
  11. To concentrate light on the defective teeth, the dentists use
  12. Which of the following is wrongly matched?
  13. The direction of heat flow between two objects depends on
  14. The spectrum of white light can be studied by
  15. Mercury is used in thermometers because
  16. When a body is projected upwards
  17. Among the following the most suitable material for the core of an electro-magnet is
  18. Nuclear fission process means
  19. Air escaping rapidly from a narrow orifice in an inflated tyre feels cool because
  20. When the earth reaches its perihelion
  21. The Indian Satellite System used for domestic communications, television and meteorology is known as
  22. The principle on which a Jet engine works is
  23. Expansion of a rod when heated
  24. The velocity of sound in air
  25. Where does the centre of gravity of a rubber ring lie?
  26. If a body weight 12N on the surface of the earth, how much will it weigh on the surface of the moon…
  27. An electric charge is measured in
  28. A pressure gauge for fluids is called
  29. The audible range of a normal human ear is frequencies ranging from
  30. Why is nuclear fusion also known as thermonuclear reaction?