JEE PHYSICS MCQ: KINETIC THEORY OF GASES

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Application +4 | -1

11^{\circ} c

, the rms speed of a gas molecule is found to be

1000 \mathrm{~m} / \mathrm{s}

. Take

R=\frac{25}{3} \mathrm{SI}

units. The molecular mass (ingrams), of the gas molecule (in nearest integer) is

View answer and explanation

Correct option: A

Option A (7) is correct because by using the RMS speed formula and substituting the given values, the molecular mass is calculated to be approximately 7 grams.

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Assertion: The pressure exerted by an enclosed ideal gas does not depend on the shape of the container.
Reason: The pressure of an ideal gas depends on the number moles, temperature and volume of the enclosed If

c_s

is the velocity of sound in air and

c

is the rms velocity, then Four particles have velocities

1,0,2,3 \mathrm{~m} / \mathrm{s}

. The root mean square of the particles is (in

\mathrm{m} / \mathrm{s}

) The translational degrees of freedom

(f_t)

and rotational degrees of freedom

(f_r)

{CH}_4

molecule are: On any planet, the presence of atmosphere implies (

{C_{rms}} =

= root mean square velocity of molecules and

{V_e} =

escape velocity) At a given temperature, the pressure of an ideal gas of density

\rho

is proportional to