Kinetic Interpretation of Temperature NEET Questions

Physics - Kinetic Theory of Gases

Kinetic Interpretation of Temperature MCQ Questions


13.
In the kinetic interpretation, the quantity (1/2)mv̄² represents:
A.
Rotational kinetic energy of one molecule
B.
Total kinetic energy of all molecules
C.
Kinetic energy of the gas per mole
D.
Average translational kinetic energy of one molecule
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ANSWER :
D. Average translational kinetic energy of one molecule
14.
For a flask containing argon and chlorine at 27°C, the ratio of average kinetic energy per molecule of argon to that of chlorine is:
A.
70.9 : 39.9
B.
1 : 2
C.
39.9 : 70.9
D.
1 : 1
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ANSWER :
D. 1 : 1
15.
For a flask containing argon (atomic mass 39.9 u) and chlorine (molecular mass 70.9 u) at the same temperature, the ratio of rms speeds vrms(Ar) : vrms(Cl₂) is approximately:
A.
1 : 1
B.
1 : 1.33
C.
1.33 : 1
D.
39.9 : 70.9
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ANSWER :
C. 1.33 : 1
16.
The kinetic theory expression E = (3/2)NkBT tells us that for an ideal gas, doubling the absolute temperature:
A.
Doubles the total internal (translational kinetic) energy
B.
Quadruples the total internal energy
C.
Has no effect on internal energy
D.
Halves the total internal energy
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ANSWER :
A. Doubles the total internal (translational kinetic) energy
17.
The value of the Boltzmann constant kB in SI units is:
A.
1.38 × 10⁻²³ J K⁻¹
B.
6.02 × 10²³ J K⁻¹
C.
1.38 × 10²³ J K⁻¹
D.
8.314 J mol⁻¹ K⁻¹
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ANSWER :
A. 1.38 × 10⁻²³ J K⁻¹
18.
The relation between the universal gas constant R, Avogadro's number NA, and Boltzmann constant kB is:
A.
kB = R + NA
B.
kB = R × NA
C.
kB = R / NA
D.
kB = NA / R
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ANSWER :
C. kB = R / NA