As long as the ATV is wired 12 volt, not 6.
Yes, you can use a twelve volt car battery charger. Be sure to set it on low.
Charge it with a 12 volt battery charger.
No
No, a 12 volt charger will overcharge a 8 volt battery and destroy it.
No it will not work
no it can't
No, the battery is DC not AC.
If you are asking the question, can you charge a 6 volt battery with a 12 volt charger, the answer is no.
It is not recommended to charge a 6 volt battery with a 12 volt battery charger as it can damage the battery. The higher voltage can overcharge the battery and cause it to overheat. It is important to use the correct charger with the matching voltage to prevent damage to the battery.
No you cannot.
No