Question

u ll eat a yellow banana n keep the outer skin aside .. after 5mins u find the yellow peel brown and after 10 mins u find it black . why?

Answer 1

It is because ethylene in atmosphere ripens them too much.
On opening the banana stuck to the peel from inside is exposed and thus it over ripens.
When it is unpeeled it has less surface area exposed and it ripens slowly.
Hope it helps
:]