you do this and that and this and also that
Yes.
In electrolysis, oxygen and hydrogen gas are produced at different electrodes (oxygen at the anode and hydrogen at the cathode). Since these electrodes do not have to be in close proximity, the...
Yes. This can be done by condensation, since the two gasses change from gas to liquid at different temperatures.
electrolysis
Used to have to do this by cooling (liquidifacation), by now they've got semi-permeable membranes that can do the job.