The ratio for the gap between successive orbits from the nucleous onwards is

The orbital angular momentum of an electron is
$\sqrt{3}\frac{h}{\pi }.$ Which of the following should not be the permissible value of orbit angular momentum of this electron revolving in Bohr orbit ?

In hydrogen spectrum, the spectral line of Balmer series having lowest wavelength is

If uncertainty in position and momentum are equal then uncertainty in velocity is.

Photoelectron emission is observed for three different metals A,B and C. the kinetic energy of the fastest photoelectrons versus frequency 'v' is plotted for each metal. Which of the following graphs can be observed?

The number of radial nodes, nodal planes for an orbital with $n=4,1=1$ is

The orbital with maximum energy is

Which of the following statements are correct for an electron that has n = 4 and m = -2 ?