I know what you mean and my first reaction was the same as yours. Indeed, I suspect the author of the quiz might in fact have meant to wirte Czechoslovakia and made a little mistake. However, in a different sense Slovakia did indeed split form the Czech Republic, just like a husband splits from a wife, since until December 1992 they both were two distinct constituent states of one Czechoslovak federation which at the split ceased to exist, just like a marriage does.
I missed the word "north" and kept typing Malawi thinking I was spelling it wrong.
Las country settled ; island of Mahé : two clues
Orangutan ; Komodo dragon : two clues