Question

why concentrated chemicals and strong acid is kept in black or dark?​

Answer 1

from penetrating (best bottles for beer, in this regard, as well).

In the case of nitric acid, I imagine that UV radiation helps in it’s degradation into NO and NO2 gas faster than if it is stored in the amber bottles that block this radiation better.

Answer 2

❤❤HERE IS YOUR ANSWER ❤❤

It undergoes slow decomposition on exposure to light//decomposes in sunlight