Q56 / 68 · NEST (NISER) 2022 (Session 1) · Physics

A turbo-pump working at constant pumping speed of $200 \mathrm{~L} \cdot \mathrm{~s}^{-1}$ is used to evacuate a vessel of 1000 L of an ideal gas at room temperature. The approximate time (in seconds) required to reduce inside pressure of the vessel from $10^{-3} \mathrm{mbar}$ to $10^{-6} \mathrm{mbar}$ is closest to

A
30.0
B
32.0
Correct answer
C
34.0
D
36.0

Hence, the correct answer is option: 'C'.

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