Question

why hydrogen peroxide should be stored in light resistant container in a cool place​

Answer 1

Answer:

Hydrogen Peroxide is extremely reactive and thus has to be kept in a light resistant (dark) and cool place

Explanation:

If you look at the structure of H2O2, the O-O single bond is extremely reactive, and it wants to decompose whenever it gets a chance by releasing H2O and nascent Oxygen (O), releasing a lot of energy. Now since it's really reactive it can easily undergo decomposition with really low amount of energy. So exposure to light or even heat could lead to its decomposition, and hence that could release a really high amount of energy. Which means it could literally burn, thus is flammable too. This is why you need to keep it away from reactive elements, in a dark container, with proper ventilation.

Answer 2

Explanation:

Due to the Oxygen-Oxygen link, Hydrogen peroxide breaks down slowly at room temperature, but quickly in presence of heat, certain catalysts (e.g., metal ions), and light.