Fundamentholfundamenthol
JEE Main2019Physics
Q.

The temperature, at which the root mean square velocity of hydrogen molecules equals their escape velocity from the earth, is closest to

[Boltzmann constant kB = 1.38 × 10–23 J/K

Avogadro Number NA = 6.02 × 1026 /kg

Radius of Earth : 6.4 × 106 m

Gravitational acceleration on Earth = 10 ms–2] 

  1. A

    104 K

  2. B

    650 K

  3. C

    800 K

  4. D

    3 × 105 K

Solution

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