Question 4. The temperature at which the r.m.s. velocity of H² becomes escape velocity from the earth is, (a) 10059°C (b) 10059 K (c) 10332°C (d) 10332 K Answer
D) 104K. Hint: Escape velocity is the minimum velocity with which a body should be protected from the surface of the earth so that it can escape from the gravitational field of the earth. The escape velocity on the surface of the earth is 11200m/s.
