The minimum kinetic energy of a ground state hydrogen atom required to have head-on collision with another ground state hydrogen atom but at rest to produce a photon is given by,

Statement-$\mathbf{1}$ : The Bohr model of the hydrogen atom does not explain the fine structure of spectral lines.

and
Statement-$\mathbf{2}$: The Bohr model does not take into account the spin of the electron

STATEMENT-1 : If the accelerating potential in an X-ray tube is increased, the wavelengths of the characteristic X-rays do not change.

because

STATEMENT-2 : When an electron beam strikes the target in an X-ray tube, part of the kinetic energy is converted into X-ray energy.