Hi

Answer :-

The angular momentum in 5th orbit is 2.5h/π

EXPLANATION

As per Bohr's atomic model, the angular momentum of an electron  in the nth Orbit is given by

L=nh/ 2π , where h is Planck's constant

Then,

the angular momentum of electron In fifth Bohr orbit is

L=5h/2π

=2.5h/π

Hence, The angular momentum in 5th orbit is 2.5h/π

Thank you