Final answer:
It is false that a high explosive requires a container to detonate. High explosives, like TNT, can detonate with the appropriate initiator without needing to be confined.
Step-by-step explanation:
A high explosive does not require a container to detonate. This statement is false. High explosives are highly reactive substances that undergo a rapid and violent reaction when subjected to an external shock, pressure, or an initiator like a detonator. For example, TNT is an explosive material that requires an explosive booster to be initiated, but it does not need to be in a container to detonate. The energy and speed of high explosive reactions are such that they do not rely on atmospheric oxygen; instead, they contain their own oxidizer within their chemical structure, allowing them to react quickly and release energy in an explosive manner.