If it's been opened before, Yes. I left one in my bedroom for a week by accident. The container became pressuized and it smelled terrible...
this is a guess.. orange juice
Apple juice has more sugar.
If the juice is within a sealed container, it may last a couple of days before beginning to spoil. If left in an open container, it can begin to ferment within hours, especially in warm weather. Storage in refrigeration or a dark closed space will help to last beyond a week.
Prune juice on its own has flushing effects on the digestive system. Opened, unrefrigerated prune juice is seen as potentially dangerous to drink depending on how long it has been left out, or how old the juice is.
2-3 weeks for hair products. 2-3 years for consumption
i don'tknow
you have to ferment it, and add certain ingredients
Some examples of Fermentation would be in the manufacture of wine and beer. More simply, if you leave apple juice open and unrefrigerated for a period of time, bubbles will begin to form as it begins to ferment. At first, some alcohol will form, but eventually it will end up as vinegar.
Wine. Grape juice will eventually turn to wine if allowed to ferment.
Only if it is left out a long time to ferment or spoil.
Only if the smell is not bad. Sometimes a juice of this kind will ferment.
Yes, it should be fine.