Question

considering the hazards information from the sds, which is the safest choice on how to store bleach? in a container with no lid in a container made of metal in a room set to 20 °c with the cap closed tightly

Explanation:

Bleach (typically sodium hypochlorite) is a corrosive and volatile substance. Storing it with the cap closed tightly prevents spillage, evaporation, and contact with incompatible substances. A container with no lid is unsafe (evaporation, contamination). Metal containers are unsuitable as bleach can corrode metal. While 20°C is a common temp, the key safety factor for storage is sealing to prevent hazards, so "with the cap closed tightly" is safest.

Answer:

D. with the cap closed tightly