No, highly unlikely.
No, it will not explode.
Yes, it very well may explode.
If you reverse the battery cables, yes the battery can possibly explode.
Yes it could over heat and explode. Don't do it.
They will not explode. They can however burst.
The battery will explode.
If you explode you die and the same applies to a car battery.
Yes, a car battery can explode if jumped improperly. Car batteries contain sulfuric acid that can produce gasses. If a spark ignites the gases the battery can explode like a bomb.
Yes
It can explode.
Yes, if you short the battery out it can explode and burn you.
Normally connecting the cables in reverse order can cause it to explode. Overcharging can also cause the battery to rupture but it is highly unlikely it would explode.