sure, no problem! The power supplying device is rated as to its MAXIMUM current delivering capacity, so 100ma being less than 650ma, you could run up to 6 of those devices in parallel with that adapter.
You should not try to run a 650ma device with a 100ma supply though.
No, if the device needs 700mA of current, your power adapter cannot supply adequate current.
Yes...(if I'm understanding your question correctly). You want to use the 600mA adaptor on a device that once used the 100mA adaptor? Yes....you can go higher with mA, but not lower.
No. Both the voltage and the current are too low.
No. The adaptor will overheat.
Yes. You can either access that Android device via a micro USB to USB adaptor, or use an app such as AirDroid (doesn't require an adaptor) to connect/sync.
Pretty certainly no; it depends slightly on the type of adaptor - if it's regulated then you'll probably destroy the adaptor and maybe the device it's plugged unto, if it's unregulated then you'll probably destroy the device and maybe the adaptor.
Yes, there will be no problem with this adapter. The 1 amp device will only be drawing half of what the adapter can produce.
No the voltage gap is too wide. If the higher voltage is used there is the possibility that the connected device might be destroyed.
Yes - what matters is the voltage - it has to be the same. The device will only draws 1A as needed - the adaptor with higher amp,i.e, 2A is fine. As long as the adaptor has amps equal to or greater than those of the device, it will be ok!
Yes, the 1000 mA has more that enough capacity to operate a 700 mA device. If the 700 ma adapter was original equipment with the device it was to charge, then the device is more than likely drawing about 500 to 600 mA. Look on the device's nameplate and you should see the mA draw.
You can use a wired adaptor if you're using a game boy advance.
A SIM card adaptor will allow you to use a micro SIM in a standard SIM slot.