is compatible with any Apple charger from which you can remove this adapter

I believe so. I've used it with a number of apple power bricks, and it seems to fit just fine each time, with no real problems.

Yes.

If your power supply can work on 110V and 230V yes. If it's not the case you need to buy a charger made for Switzerland.

I don’t have USB-C adapter, but it has worked will all Apple power adapters I have ever owned, so I see no reason why it would not.

This product is compatible with the macbook charging bloc :)