NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Physics MCQs (Practice_Test 32 of 35)
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- In a porous plug experiment, the change in temperature of the gas depends upon
- its specific heat
- its thermal conductivity
- the difference in pressure on either side of the plug
- the rate of flow of the gas through the porous plug
- Consider the following statements
- The energy change during a reversible adiabatic process is zero.
- Entropy is a state function.
- The entropy of a thermally isolated system never decreases.
- The entropy change during an irreversible adiabatic process is zero.
- Of these statements
- 1 and 3 are correct
- 2,3 and 4 are correct
- 2 and 4 are correct
- 1,2 and 3 are correct
- The efficiency of the reversible cycle shown in the given figure is
- 16.7%
- 33.3%
- 50.0%
- 66.7%
- The percentage of lighter gases like hydrogen and helium is very small in the atmosphere of the earth. This can be explained on the basis of
- kinetic theory of matter
- temperature gradient of the atmosphere
- Brownian motion of the gas molecules
- concept of equipartition of energy
- Consider the following statements about Brownian motion
- The motion is continuous, random and irregular.
- No two particles, execute the same motion.
- Smaller the particles, faster the motion.
- The motion is dependent on external influences.
- Of these statements
- 2,3 and 4 are correct
- 1,3 and 4 are correct
- 1,2 and 4 are correct
- 1,2 and 3 are correct
- Consider the following statements: Viscosity of a
- gas increases with temperature.
- gas decreases with temperature.
- liquid generally decreases rapidly with temperature.
- liquid generally increases rapidly with temperature.
- Of these statements
- 1 and 3 are correct
- 1 and 4 are correct
- 2 and 3 are correct
- 2 and 4 are correct
- Which of the following pairs are correctly. Matched?
- Law of liquefaction of gases: Joule-Kelvin
- Law of distribution of speed: Maxwell
- Law of equipartition of energy: Boltzmann
- Select the correct answer from the codes given below
- 2 and 3
- 1 and 3
- 1 and 2
- 1,2 and 3
- In the equation of state for real gases (P + a⟋a2) (v-b) = RT the constant ‘a’ determines
- Vc alone
- Pc alone
- Tc alone
- Vc and Pc
- A radiating gas at temperature T (Kelvin) fills a cavity of volume V. If the system expanded adiabatically and reversibly to a volume of 8V, then the temperature would change by a factor of
- 8
- 2
- Match List I (Physical quantity) with List II (Units) and select the correct answer
List-I | List-II |
|
|
- A
- B
- C
- D
- 1
- 4
- 3
- 2
- 5
- 4
- 2
- 1
- 1
- 5
- 3
- 2
- 5
- 2
- 4
- 1