Quelle est la capitale de l'Islande?

Answer 1

"Quelle est la capitale de l'Islande?" is the correct way to ask your question.

Let's break this down to understand why:

• "What" (quelle) in in its feminine form, since the corresponding noun (capitale) is feminine.
• Capital in French is "capitale," and so, it is written la capitale.
• "Of Iceland" should always be written with the corresponding definite article (le, la, les); so it would be "de la". However, since Iceland (Islande in French) begins with a vowel, we write "de l'Islande".
• You must always write your questions in proper grammatical form. There are, of course, informal ways of speaking in French, but the structure you have used is not one of them, and is in fact, an anglicism: "The capital of Iceland is?" You would need to write "What is the capital of Iceland?"

Finally, to answer your question,

La capitale de l'Islande est Reykjavik.