Question:
The temperature, at which the root mean square velocity of hydrogen molecules equals their escape velocity from the earth, is closest to:
[Boltzmann Constant $k_{\mathrm{B}}=1.38 \times 10^{-23} \mathrm{~J} / \mathrm{K}$
Avogadro Number $\mathrm{N}_{\mathrm{A}}=6.02 \times 10^{26} / \mathrm{kg}$
Radius of Earth : $6.4 \times 10^{6} \mathrm{~m}$
Gravitational acceleration on Earth $=10 \mathrm{~ms}^{-2}$ ]
$800 \mathrm{~K}$
$3 \times 10^{5} \mathrm{~K}$
$10^{4} \mathrm{~K}$
$650 \mathrm{~K}$
Question of from chapter.
JEE Main Previous Year [8April 2019 II]
Correct Option: 3
Solution:
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