Atoms

The shortest Wave length in the lyman series of hydrogen spectrum is 912 Å. The shortest wavelength present in paschen series of spectral lines will be

A flask contains Argon and Chlorine in the ratio of 2:1 by mass. The temperature of the mixture is 27°C. The ratio of root mean square speed of molecules of two gases will be: (atomic mass of Argon =40 u and molecular mass of Chlorine = 71 u)