As far as I know, yes.

In some regions of Germany, beer wasn’t traditionally as common as you might expect. By watering down wine, you get a beverage with a similar alcohol content like beer which you can drink in similar contexts - for example, it’s not a great idea to drink undiluted wine when you’re sitting outside on a hot summer day

You can mix carbonated water and wine - that’s called Weinschorle in German

I don’t think making semiconductors at home is explicitly illegal anywhere, but I doubt hobbyists can legally buy or synthesize many of the chemicals you’d need

That depends on whether it was always kept at that temperature - if it melts and re-freezes, it becomes much harder