Question

what happens to the nitrogen and hydrogen which remains unconverted during the haber process

Answer 1

Answer:

The unreacted hydrogen and nitrogen gases are recycled by being fed back through pipes to pass through the hot iron catalyst beds again. The reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. ... The unreacted nitrogen and hydrogen are then recycled back into the reactor .

Answer 2

it will exhaust eventually and you will be left with either hydrogen or nitrogen depending on their quantities.