The ratio of root mean square velocity to average velocity of a gas molecule at a particular temperature is

Equal weights of methane and oxygen are mixed in an empty container at 25^oC. The fraction of the total pressure exerted by oxygen is

A solution of sodium metal in liquid ammonia is strongly reducing due to the presence of

Give reasons of the following:
Sodium carbonate is made by Solvay process but the same process is not extended to the manufacture of potassium carbonate.