Can a 4th generation iPod touch charger work on a iPhone 4?

I'm getting an iPhone 4 soon and i was just wondering if my 4th generation iPod touch charger would work on the iPhone 4 id be getting?

Yes it can charge your iPhone, but you need to make sure the charger satisfy this: 5V, 1A. If the charger fits for these, you can use it to charge your iPhone 4, if not, don't, it will do harm to your iPhone's battery.

I don't see why not

YES!

Yes. They have the same charger.

Can a iPhone 6 power bank work for a ipod gen 4.