Physics Practice MCQ Page 21

Multiple Choice questions for Physics in the sets of 10 each on one page with questions and answers. All sets are useful in the preparation of subject tests for employment or admission.
Question: 527   Two gases A and B having the same temperature T, same pressure P and same volume V are mixed. If the mixture is at the same temperature T and occupies a volume V, the pressure of the mixture is
  1. 2P
  2. P
  3. P/2
  4. 4/P
Question: 528   According to the first law of thermodynamics
  1. Reducing pressure on liquids lowers the boiling point
  2. Evaporation is a cooling process
  3. A gas heats when compressed
  4. There is a mechanical equivalent of heat
Question: 529   The difference between molar specific heats of a gas at constant pressure and at constant volume is equal is to
  1. Boltzmann's constant
  2. Steafan's constant
  3. Gas constant
  4. Rydberg's constant
Question: 530   Brownian movement can be attributed to
  1. Surface tension
  2. Irregularities in the temperature of thee liquid
  3. collisions amongst the particles of the medium
  4. none of these
Question: 531   Ajar has a mixture of hydrogen and oxygen gases in the ration 1:5. The ration of the mean kinetic energies of hydrogen and oxygen molecule is
  1. 1:16
  2. 1:4
  3. 1:5
  4. 1:1
Question: 532   The specific heat of gases are explained by the principle of equipartition of energy. The principle states that the energy is equally distributed in:
  1. all possible degrees of freedom
  2. vibrational degrees of freedom only
  3. rotational degrees of freedom only
  4. internal degrees of freedom only
Question: 533   Boyle's law is an example of a/an
  1. adiabatic process
  2. isothermal process
  3. latent heat process
  4. mechanical process
Question: 534   If a gas in a closed container is allowed to expand without supplying any energy, which of the following statements about the behavior of molecules will be true? I.they will collide less frequently with each other II. they will more faster III. they will move slowly IV. the collisions will become inelastic instead of elastic V.They won't collide so frequently with the walls of the container
  1. only I
  2. I,II,IV,V
  3. I,II,III,V
  4. I,III,V
Question: 535   We define that the temperature of inversion of a gas is the temperature below which
  1. no further change follows in temperature when passed through a porous plug
  2. a gas can be easily liquefied
  3. the gas shows heating effect
  4. the gas shows a cooling effect
Question: 536   Velocities of light in water and glass have the following relations:
  1. Velocities in both the media are equal to that in vacuum
  2. the velocities in both the media are the same but less than that in vacuum
  3. the velocity in water is more than that in glass but less than that in vacuum
  4. the velocity in water is less than that in glass and that in vacuum
Question: 537   Two thin lenses, one of focal length +20 cm and another of focal length -40 cm are in contact. The focal length of the combination is
  1. -20 cm
  2. 20 cm
  3. +40 cm
  4. -40 cm
Question: 538   The refractive index of glass with respect to red light is
  1. greater than with respect to blue light
  2. equal with respect to blue light
  3. less than with respect to blue light
  4. less than and equal to blue light

Answers to the questions of Physics on this page

Following list gives the correct choice for the answer of the Physics mcqs.
527 . B       528 . C       529 . D       530 . C       531 . C       532 . A       533 . B       534 . D       535 . D       536 . C       537 . C       538 . C      

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